RMUTCON 2022_ABSTRACT INTERNATIONAL CONFERENCE

The 11th Rajamangala University of Technology International Conference T“hReM1U1Tth DRraivjianmg atonwgaarlda IUnnoivveartisointy, EocfoTneocmhynaonlodgGyreInenteTrencahtniolnoaglyCfoornference The 11th Ra“jRamMaUngTalaDUrinviivnergsittoywofaTrdecIhnnonloogvyatIinotner,nEatciooSnnuaolsmtCaoyinaafenbrldeenGDcereeveenlopTmecehntn”ology for “RMUT Driving toward Innovation, Economy and Green Technology for Development” Sustainable Railway Area Detection Using Deep Segmentation Networks Saifun Khrueakhrai and Jakkree Srinonchat* Signal Processing Research Laboratory Department of Electronics and Telecommunications Engineering Faculty of Engineering, Rajamangala University of Technology Thanyaburi 39 Moo 1, Rangsit-Nakhon Nayok, Pathum Thani 12110, Thailand * Corresponding email: [email protected] Abstract Detecting obstacles or suspicious objects in the railway area is essential for rail transport, especially high- speed trains. However, the detection system is developed using image processing by adjusting parameters and features, but there are limitations in the system's performance and accuracy when used in a complex environment. This paper, therefore, presents an exploring deep segmentation network for railway area detection at the pixel level. The system was designed based on the SegNet technique combined with a pre- trained convolutional neural network VGG- 16. The 1,000 input dataset was collected from the captured video frames from the front rail vision divided into 80% and 20% training and testing sets, respectively. The parameter value of the number of training sessions is 100 cycles. In testing, brightness and darkness were improved by the gamma correction technique to analyze the endurance performance of the system. Keywords: deep segmentation network, convolution neural networks, rail area detection 353

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRTMMhUeUTT11DthriivRviinnagjgatotmowwaaarndrgdIanIlnnaonvUoavtniaoitnvi,oeEnrcs, oiEtnycoomonfyoTamneydcaGhnrndeoeGnlorTgeeyecnhInnToetlecorhgny afooltroiognyafol rConference “RMUT Driving toward InnovatioSnu, sEtSaciunosantbaoliemnDaybevlaeenlDodpemGveerlneote”pnmTenetc”hnology for Sustainable Development” Drying Kinetics Models of Mini Heat Pump Dryer for Sliced Bananas Phairoach Chunkaew*, Aphirak Khadwilard and Chakkraphan Thawonngamyingsakul Department of Mechanical Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna Tak, Muang, Tak 63000, Thailand *Corresponding email: [email protected] Abstract The objective of this research is to model a mini heat pump dryer from sliced bananas. Six models of Newton, Henderson and Pabis, Logarithmic, Two-term, Modified Henderson and Pabis, and Diffusion approach from the literature are selected and adapted for prediction of the drying kinetics of sliced bananas from the mini heat pump dryer. The experiments are carried out at a drying temperature of 60 oC, with air flow rates of 0.117, 0.128, and 0.140 m3 s-1 and evaporator bypass air at 60%. To test, an air system with a closed loop and a heat pump's working fluid R134a are used. Sliced bananas have an initial moisture content of 244 - 281% dry basis and are dried until their final moisture content is lower than 6.24 ± 0.007% dry basis. Their constants in the models of selected models are fitted with experimental data by non-linear regression analysis. The criteria for evaluating the models are the values of the coefficient of determination (R2), the root mean square error (RMSE), and the reduced chi-square (  2 ). It was found that among the models tested, the diffusion approach model of this study could be considered the most appropriate. Keywords: sliced banana, drying kinetics, models, heat pump dryer 364

The 11th Rajamangala University of Technology International Conference Th“eTR1hM1“e“thRUR1RMT1MaDUtjhaUrTmiRvTaDiannDjrggaiavrtmoliianwvaigaUnnrntgdgoivwIatneolarnawrsoidUatvyarIntndoiiofnvInToen,evrnEcashoctiinotvoynoanlotoo,migofEyynTcaIo,nennEtcdeohcrGmonnranyoeteSolainooumnngTsdayytealGcaiCIhnrnnnoeatdonebelfnolGreegrnTryeDeaenfceteochivernoennlTooalepolcmgChyenonfoont”rlfoegryenfcoer Sustainable Development” Hall Effect Sensor Using Micro Strip Add-drop Filter Chatchawal Sripakdee* Department of Science, Faculty of Science and Technology, Rajamangala University of Technology Phra Nakhon, Bangkok, THAILAND *Corresponding email: [email protected] Abstract The conduction electron - photon interaction from the whispering gallery mode generated by launching the polarized laser into the gold micro-strip Hall effect sensor at the resonant frequency is studied and proposed. The most sensor efficiency is operated at the input power of 100-400 mW and the response time is 1.3 fs. Keyword: Hall effect sensor, Add-drop microstrip 395

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMTUhUTeT 1D1rtiihvviiRnnggatjotaowmwaaradrndIgnInanolnavoaUvtiaontnii,ovEnec,roEsnictooymnyooSfamunTysdteSaaGciunnrhsdeantebaGnolienlrToDeaegebcenhyvleenTIloDoenlpcoetmhgveyenrelnnfoootla”protmgioyennfota”rl Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” The Site Survey and Study of 40 kw Hybrid Wind Turbine & Solar PV (Case Study at Tak Province) Nima Azhari1, Wirachai Roynarin2*, Sirisak Pangvuthivanich1 and Suthep Simala1 1Doctor of Engineering Program in Energy and Materials Engineering Faculty of Engineering Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani, Thailand 2Energy Research and Service Center Faculty of Engineering Rajamangala University of Technology Thanyaburi, Thanyaburi, Pathumthani, Thailand *Corresponding email: [email protected] Abstract The oil industry holds a significant risk to the environment, and it may have an impact on it at multiple levels: air, water, soil, and, as a result, all living species on our planet. Pollution is the most common and dangerous result of oil and gas industry activities in this environment. But these days, we are able to replace fossil fuels with clean and green energy. This sustainable clean energy can be from the wind by installing a wind turbine or it can be from the sun by installing PV panels. The Durian farm in Tak province is being analyzed by the Faculty of Engineering at Rajamangala University of Technology Thanyaburi to install a 10-kW wind turbine and a 30-kW solar panel. The average wind speed in the area at the location of the durian farm and the simulation of the installation of solar power generation systems installed on the ground and assessed by the World Bank's energy generation model is 5.34 m/s. This wind speed is suitable for a 10kW low-speed wind machine. It is expected to generate 120 electrical units from solar cells and 83 electrical units from low-speed wind turbines per day. Therefore, the capacity of this hybrid system is estimated to generate approximately 73,500 electrical units per year. The budget allocated for this project is 6 million Thai baht. On the other hand, it is cost-effective and has a payback time of 7.5 years while the system has a lifetime of more than 15 years. This system is designed for the long run, which results in producing clean energy and reducing carbon dioxide emissions. Keywords: Lithium battery storage, wind turbine, Solar Cell, Hybrid system 4306

The 11th Rajamangala University of Technology International Conference TTh“ehR“1eMR1t1hMU1RTUtahDjTRarmDiavaijrnanivggmiatnolagawnaUtgorndwailvIaanerrndUsoiItnvnyaintvoioofenvTra,seEtciithocynonnoo,lofEomgTcyyoeanIcnnohtdmenrGyonrSalaeotuenignosdytnTaGaeiIlncrnCheatneobenonlrelfnoTeDgraeyectenhifvocenernlooalpolmgCyeonfnot”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Design and Development of Posture Correction Shirt with Tensile Force Analysis Nareerut Jariyapunya*, Sunee Hathaiwaseewong, Areeya Thongsalee, Krit Poomfuang and Nanjaporn Roungpaisan Rajamangala University of Technology Thunyaburi, Department of Textile Engineering, Faculty of Engineering, Pathum Thani, 12110, Thailand *Corresponding email: [email protected] Abstract This research aimed to analyze body compression of posture-correcting shirt in order to determine its pressure value during worn. Interestingly, pressure or compression of tight-fitting wear tended to influence the clothing physiology of the user and thus, along the same lines, efficiency of compression clothing would be dependent upon proper clothing pressure distributions. In addition, to develop most effective posture correction shirt, compression pressure using an applied theory of Laplace’s Law would be referred to calculate and predict appropriate pressure distributions during worn. The results of the study indicated that when elastic fabric of posture correction shirt was tested for determination of its tensile stretch, it was found that its tensile strength had maximum force of 294.61 N with maximum elongation of 426.53% based on standard ISO 13934-1 while its force decay was found to be only just 6%. Regarding the statistical analysis, polynomial regression was applied to analyse the fitting-line in order to predict the strain (ε) accurately at the magnitude of the fabric stress (σ) which is based on standard EN 14704-1. Last but not least, it may be concluded from the testing that when fabric was stretched at 50%, the pressure value was found to be 3-5 mmHg meaning the pressure distributions in the fabric were significantly low and were considered to be best for wearing comfort. Keywords: Posture Correction Shirt, Tight-fitting, Compression, Pressure, Elastic Fabric 4317

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowmwaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienlrToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenrelnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Activated Carbon Production from Carbon Wastes Discarded from Thermochemical Processes Chaiyan Chaiya1*, Lalita Attanatho2 and Yoothana Thanmongkhon2 1Department of chemical engineering, Faculty of Engineering, Rajamangala University of technology Thunyaburi, Pathum Thani, 12110, Thailand 2Expert Centre of Innovative Clean Energy and Environment, Thailand Institute of Scientific and Technological Research (TISTR), Pathum Thani, 12120, Thailand * Corresponding email: [email protected] Abstract The residue materials as carbon discarded from two thermochemical processes gasification, and pyrolysis were derived to activated carbon via steam and the CO2 activation process. The gasification waste is the carbon from a hardwood called GC, while the pyrolysis waste is the carbon from tires called PC. They were activated under the same conditions. The activation process was set up under N2 conditions by varying the activation time to 700-900 C, steam flowrate as 13-24 ml/min, and CO2 flowrate as 25-100 ml/min. The results showed that the yield of activated carbon from GC by using steam and CO2 was in the same range as 70-90%; meanwhile, the yield of activated carbon from PC by steam was 9-35% and highly 88-96% activated by CO2. The BET N2-adsorption model showed the noticeable results that the surface area increased with the increasing of activating temperature and gas flow rate under all conditions, except that the activated carbon from GC by using steam. It seems that the steam effect's increase of steam rate in GC activation decreased surface area significantly. The activated carbon from GC obtained the highest surface area was 711.76 m2/g from steam activation and 422.15 m2/g from CO2 activation. However, the activated carbon from PC showed an unsatisfied amount of surface area of 228.58 m2/g and 77.43 m2/g activated by steam and CO2, respectively. Keywords: Activated carbon, Gasification waste, Pyrolysis waste, Steam, Carbon dioxide 4328

The 11th Rajamangala University of Technology International Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Analysis of a Concave Bulletproof Plate for Refracting the Bullet Impact Direction with Finite Element Method Nuttapong Meesanu1, Prasert Wirotcheewan2, Duongruitai Nicomrat3 and Prakorb Chartpuk4* 1, 2, 4 Department of Mechanical Engineering 1, 2, 4 Faculty of Engineering, Rajamangala University of Technology Phra Nakhon 3 Division of Environmental Sciences and Natural Resources 3 Faculty of Science and Technology, Rajamangala University of Technology Phra Nakhon 1381 Pracharat 1 Road, Wongsawang Sub-district, Bang Sue District, Bangkok, Thailand *E-Mail: [email protected] Abstract This research has designed a concave shape of bulletproof plate with SKD11 material which leads to the bullet changing direction when the bullet impacts on a bulletproof plate at the speed 880 m/s, according to the National Institute of Justice (NIJ), Level 4. The bullet was made of tungsten carbide referred from the theory of damage simulation of Johnson-Holmquist (JH-2) with finite element simulation using the Ansys/Explicit dynamics program. The bullet was shot at the middle of the bulletproof plate at 5-, 6-, 7-, and 8-mm depths of concave area. It showed that the plate could not resist the penetration from the bullet and there was no reflection when the bullet impacted the middle of the plate. The hooting position which aimed from the center with a radius of 7.5 mm could change the bullet direction when it hit the bulletproof plate. It penetrated in the middle of the plate and scattered into small metal pieces. The result of these 2 simulation models indicated that the bulletproof plates could not resist bullet penetration. This parameter analysis can be used to analyze the direction of the bullet’s refraction to reduce the damage from 7.62 mm bullet destruction. The significant parameters were concentrated on the material type used for making the bulletproof plate and the thickness of the bulletproof plate. Keywords: Concave bulletproof plate, Bullet impact, NIJ 4 39

The 11th Rajamangala University of Technology International Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” The Parameter Analysis of the Tungsten Carbide and SUS304 Armor Plate with a Finite Element Method (1 line space) Maitree Thawornsin1, Songwut Mongkonlerdmanee2, Duongruitai Nicomrat3 and Prakorb Chartpuk4* 1, 2, 4 Department of Mechanical Engineering 1, 2, 4 Faculty of Engineering, Rajamangala University of Technology Phra Nakhon 3 Division of Environmental Sciences and Natural Resources 3 Faculty of Science and Technology, Rajamangala University of Technology Phra Nakhon, 1381 Pracharat 1 Road, Wongsawang Sub-district, Bang Sue District, Bangkok, Thailand * Corresponding email: [email protected] (1 line space) Abstract In the wake of the unrest of three southern provinces, riots and the use of powerful weapons for detriment, bulletproof armor plates have been developed and designed from materials with capability of destroying 7.62 mm bullets with speed of 878±9.1 m/s in accordance with National Institute of Justice Level 4 (NIJ 4). The research using materials tungsten carbide (WC) with 6, 8, and 10-mm thickness and SUS304 with 5, 6, 8, and10 mm thickness were performed according to the Johnson-Holmquist failure model damage theory (JH-2) and the Steinberg-Cochran-Guinan-Lund- model's theory of damage, respectively. Both plates of the material were stacked in two layers when the bullet head were slammed into plate 1, broken and caused the bullet penetrated through to the second plate, where it could embrace the bullet scrape. Each plate was thus simulated by the finite element method. For plate 1, a WC material at all thickness of 6, 8 and 10 mm could not withstand the penetration of the bullet and was damaged by the bullet whereas plate 2, SUS304 material at thicknesses of 5, 6, 8, and 10 mm could not withstand the penetration of the bullet, but at a thickness of 5 and 6 mm, the bullets were broken and damaged. These bullets changed to fuselage debris and penetrated through the plate at a thickness of 8 and 10 mm. These damaged and shattered bullet metals were clearly observed on the back of the plates. Therefore, with all thickness parameters for being a double stacking plate, the armor plates are not yet able to withstand the penetration of the 7.62 mm bullets because the increased thickness of the first WC plate had resulted in the damage to the bullet head but also caused the metal fragments penetrating the armor plate and showing broken plate pieces together with the metal fragments. As the thickness of plate 2 made of SUS304 increased, the weakening of the plate decreased. It would result in less bullet metal holding. In the details, it was observed that at the increased thickness, the metal fragments were less dispersed after penetrating the armor plate. The increases in the same thickness at 12, 14, 16 mm for both plates 1 made of WC, and plate 2 made of SUS304 confirmed that the armor plates at thicknesses of at least 16 mm began to withstand the penetration of a 7.62 mm bullet. (1 line space) Keywords: 7.2 mm bullet, Armor plate, Finite element method (1 line space) 40

SESSION 3 Medical Science and Herb 43

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” “New Technologies in Healthcare”: Concept, Experience, Innovation Potentials and Development Jinpitcha Mamom Sathiyamas Department of Adult Nursing and the Aged, Faculty of Nursing, and Center of Excellence in Creative Engineering Design and Development, Faculty of Engineering, Thammasat University, Khlong Luang, Pathum Thani 12121, Thailand * Corresponding email: [email protected] Abstract Innovative technology played an important role in developing healthcare of global nursing today. Healthcare technology needs high-intensive nursing and accurate of diagnostic for treating patients. It is important to note that innovative healthcare can enhance assistive technology, medical device, and clinical service. Healthcare professionals are effective patient-centered care, medical technology, information system, and supportive service. Technology adoption of innovative provides a flexible care, patient-centered, virtual medication, and technical innovations that enhance the quality of life. A new paradigm shift in innovative healthcare, responsibility of disease prevention, and health management. Taken together, developing innovative healthcare will open up new approaches to prevention, therapeutic, diagnostic system, device, and technology. Mainly these innovations are geared to optimize the patient comforts and concedes more freedom mobility. New healthcare to bring innovative nursing will facilitate appropriate health service to patient needs. Technology provides clinicians with information and tools, such as clinical decision support that can improve the quality of care, which reduces potential medical errors. Medical device technology is shifted from personal digital assistance (PDAs), decreasing cost, developing new products, furthering research and development, and providing better cares. Keywords: Innovative healthcare, Innovative technology, Medical technology 442

The 11th Rajamangala University of Technology International Conference Th“eTR1Mh1“te“hURRR1TMaM1DjUtahrUmTiRvTaiDnanDgjrgaiatrvomliiawnvaaUignrnndtggoivIwatneolranawsroidtvUayarIntodniofinvnITone,evErcnahscotinoitvonoyanlootmo,igofEyynTcaIo,nnenEtdceohrcGmnonraenyoteSiolanooumnnTgsdaeyytlacGCahiInrnnnoeaondteblefonelGrgernTyerDnaeefcoceteehrivnoennlTooalepolcmgChyenonfoont”rlfoegryenfocer Sustainable Development” Robotic Haptic Sensing and Interaction for Surgery HHoonngbbiinnLLiuiu1 1InInstsittiututeteoof fAAuutotommaatitoionn(C(CAASSIAIA),),HHoonnggKKoonnggInInstsittiututeteoof fSSccieiennccee&&InInnoovvaatitoionn, ,CChhinineseeseAAcacaddememyy of Sciences Abstract Haptic capability, both sensing and interaction, is essential for a robot working in unstructured environments, yet robotic haptic technology today is still very primitive compared to even the simplest biological creatures. Haptic interaction is a cornerstone of many medical interventions/practices to ensure safety and efficacy. Our lab designs robots with advanced haptic perception and interaction capabilities to address unmet needs in medicine, enabling safer and more effective diagnosis and treatment. We commit our work to benefit both patients and the medical profession while advancing the frontier of haptic robotics research. In this lecture, I will share our experience of how to create augmented haptic sensing for medical instruments, and how we achieve effective haptic interaction during diagnosis and robotic endoscopy Keywords: 453

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Evaluation of in vitro Antioxidant and Antityrosinase Activities of Mimusops elengi L. Flower Extracts Jindaporn Khongdetch1*, Pitchya Tangsombatvichit2, Orrapun Selamassakul3 and Nattapon Kaisangsri3 1Research and Development Institute, Rajamangala University of Technology Suvarnabhumi, Pra Nakorn Si Ayutthaya, THAILAND 2 Faculty of Science and Technology, Rajamangala University of Technology Suvarnabhumi, Pra Nakorn Si Ayutthaya, THAILAND 3 School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, THAILAND *Corresponding Author E-mail: [email protected] Abstract Mimusops elengi, commonly known as Pikul in Thailand and used as a medicinal plant in traditional medicine. This study was investigated the different solvent extracts of M. elengi L flower for their in vitro antioxidant and antityrosinase activities. The 50% ethanolic extract showed the highest inhibition of tyrosinase production (60.86%) and possessed the highest antioxidant activities with IC50 of 0.25 and 1.34 mg/mL for DPPH and ABTS assays, respectively. The total phenolic content was determined by using Folin-Ciocalteau reagent, and it was consistent with the antioxidant capacities; the 50% ethanolic extract of M. elengi L flowers gave the highest total phenolic content with 141.63 mg GAE/g crude extract. Therefore, the present work confirms marked in vitro antioxidant and antityrosinase activities of M. elengi L. flowers. As a result of the current study's confirmation of significant in vitro antioxidant and antityrosinase activity of M. elengi L flowers, it may be used as a novel active ingredient for whitening and anti-aging agents in a cosmetic industry. Keywords: Antioxidant, Antityrosinase, Total phenolic content, Mimusops elengi L flowers 464

TheT1h1teh R11atjhaRmaajnagmalaanUgnailvaerUsintyivoefrTseitcyhnooflTogeychInntoelrongaytioInnatelrCnoantfieorneanlceConference “TRMh“eURT1M1DUthriTvRiDnagjraitvomiwnaagrndtgoIwanlnaaordvUaItninoinnvo,evErasctoiitnoyonmo, fEy TcaonendcoGhmnreyoeSlnaounTgsdeytcaGhiInnrneoatelbeonlrgenyTDaefocetrhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Use of Herbs and Traditional Medicine Among Asian Youths in the Digital Age: Cosmetics, Beauty and Anti-Aging Lavanchawee Sujarittanonta1*, Lin fan2 and Rajendra Khimesra3 11FFaaccuullttyyooff SScciieennccee aanndd TTee((ccRRhhMMnnooUUllooTTggPPyy)),,,,RRBBaaaajjannamggmkkaaoonnkkgg11aa00llaa8800UU00nn,,iiTTvvehheraarssiiillitaatyynnoddoff TTeecchhnnoollooggyy PPhhrraa NNaakkhhoonn 22CCoolllleeggee ooff MMaannaaggeemmeenntt,, NNaattiioonnaall SSuunn YYaatt--sseenn UUnniivveerrssiittyy,, KKaaoohhssiiuunngg CCiittyy880044,, TTaaiiwwaann 33BBiirrllaa IInnssttiittuuttee ooff MMaannaaggeemmeenntt TTeecchhnnoollooggyy ((BBIIMMTTEECCHH)),, UUttttaarr PPrraaddeesshh 220011330066,, IInnddiiaa * Corresponding email: [email protected] Abstract The new age of digital medicine has revolutionized treatments for health and beauty, including cosmetics and anti-aging. Various technological solutions and digital tools are now readily available and easily accessible to help people maintain not only their health, but also improve their physical appearance. At the same time, there is also a strong “back to nature” and “sustainability” wave that avoids chemicals and scientific processing. This research explores the use of herbs and traditional medicine among Asian youths of the digital age, because this is the age group that is most conscious about their physical appearance, and are educated through social media to be more concerned about environmental pollution’s effect on health and aging. Therefore, open-ended questions were asked through social media to youths in Thailand, Taiwan and India aged between 18-22 to find out their use of herbs and traditional medicine for health, beauty and anti-aging purposes. It was found that the majority of our Taiwanese and Thai youth informants found environmentally friendly ways of staying young and healthy through their use of herbal plants, some of which also can slow down the normal ageing process. Similarly, Indian medicinal systems such as Ayurveda, Siddha, and Unani have a long history; and more and more Indian youths are following environment-friendly traditional Indian medicine-based products for vitality, beauty, cosmetics, and anti-aging. We also found that both LGBT lifestyles, plastic surgery and the magic of digital solutions had an extremely positive influence on beauty ideals in Taiwan, where the cosmetic industry is booming; meanwhile in Thailand, creative campaigns promote herbs used in Thai cooking for their medicinal properties in boosting immunity against COVID-19. Keywords: herb, traditional medicine, cosmetics, beauty, anti-aging, digital age, Asian youths 475

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Characteristics of Natural Fermented Miang Extracts Used as An Important Antioxidant in Cosmetics Duongruitai Nicomrat Rajamangala University of Technology Phra Nakhon, 399 Samsen Rd. Vachira Phayaban Dusit Bangkok 10300, Thailand * Corresponding email: [email protected] Abstract The research team had thought of studying the properties of developed natural fermented Miang extract for being an important antioxidant substance in cosmetics to transfer to the Sakadee community, Nan Province. The research had started at the development of a natural fermentation process (modified local method), studied the extraction process yielding important substances from natural miang fermentation, and evaluated the total phenolic contents (TPC) and anti-oxidation of bioactive extracts. The outcome Miang fermented studies transferred included the study for the fermentation process affecting the quality of bioactive compound and the extraction procedures for crude bioactive compounds that could tentatively be one active ingredient in skin cream cosmetics. It was demonstrated that natural aerobic fermentation and following anaerobic fermentation with a stock of lactic acid bacteria (LAB) isolates to control pathogen contamination induced the efficiency and characteristics of fermentation insignificantly different from the controls (commercial miang). Moreover, the optimum fermentation time took approximately 20 days. In the process of extracting bioactive substances with ethanol by soaking the extracts with water and virgin coconut oil with the maceration method at room temperature and shaking in 50% ethanol for 3 hours resulted in high contents of TPC and antioxidant properties. In addition, the developed approach using inoculated LAB influenced characteristics such as color, odor, and taste of fermented miang meat well accepted by the users. TPC as well as the antioxidation properties for miang were effectively enlightening the proper controllable conditions for obtaining high bioactive constituents for possibly being a potent gradient applied in cosmetics. Keywords: Miang Extracts, Antioxidant, Anaerobic Fermentation 486

The 11th Rajamangala University of Technology International Conference The 11th“RRaMjaUmTanDgrailvainUgnitvoewrasirtdy oInf Tneocvhantoiolong,yEIcnotenronmatyioannadl CGornefeenreTneccehnology for “RTMhUeT1D1trhivRinagjtaowmaardngInanloavaUtinoinv, eErcsointoymoyfaTndecGhrneeonSlouTgescytahiInnnoaltobeglreynfDaoretivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Anti-Aging Activity of Tagetes patula L. Extracts Entrapped in Niosomes Korawinnwwiicchh BBoooonnppiissuuttttiinnaanntt11**,,WWiirriinnddaaCChhoommpphhoooo11,,KKeettssaanniiSSrriipprraasseerrtt11,, AAmmoornrnCChahiayiaysaasta2t,2,PPrereyeyapapoornrnCChhaiayiyasaasta2t2a,nSdaSeanegnnganpaapTa hTohnognsgas1a1 1Innovative Natural products from Thai Wisdom (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi (RMUTT), Pathumthani 12130, Thailand 2Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Klong 6, Thanyaburi, Pathumthani 12110 Thailand * Corresponding email: [email protected] Abstract In this study, the ethanolic extract from French-marigold (Tagetes patula L.) entrapped in niosomes was prepared by using cholesterol:glyceryl monostearate (GMS) at the ratio of 7:3, and added 0.05% of stearic acid as enhancers, and size reduced by Hand-shaking method and Microfluidizer at 20,000 psi for 5 rounds. The results demonstrated that the niosomes prepared using GMS as stabilizer showed higher physical properties and colloidal stabilization than stearic acid. The nanoparticle sizes, zeta potential, polydispersity index (PDI), and % entrapment efficiency (EE) of the ethanolic extract from French-marigold (Tagetes patula L.) entrapped in niosomes were 188.24 ± 21.89 nm, -49.6 mV, 0.53, and 87.77 ± 0.08 %, respectively. Moreover, the extract entrapped in niosomes at the concentration of 0.1 mg/mL stimulated of the collagen biosynthesis and anti-aging gene expression (SIRT1 and FOXO1) on human dermal fibroblasts as well as the anti-melanogenesis on melanocytes (B16F10) cells. In addition, it showed non-cytotoxicity on human dermal fibroblasts. This study has suggested that the ethanolic extract from French-marigold entrapped in niosomes can be further developed into anti-ageing cosmetic products. Keywords: French marigold, melanogenesis, nanovesicles, whitening, collagen biosynthesis 497

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Collagen Biosynthesis Stimulation and Anti-Melanogenesis Activities of Ludisia discolor Extracts Entrapped in Niosomes Korawinwich Boonpisuttinant*, Jinapa Sangsee and Sarinporn Udompong Innovative Natural products from Thai Wisdom (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi (RMUTT), Pathumthani 12130, Thailand * Corresponding email: [email protected] Abstract The physico-properties of the Ludisia discolor (Ker Gawl.) A.Rich. ethanol extract (or LD) entrapped in niosomes were prepared by using Cholesterol: Tween 60 at the ratio of 7:3 and added stearic acid as enhancers. The reduction of nanoparticle sizes was using Hand-shaking method and Microfluidizer at 20,000 psi for 5 rounds. The results showed that nanoparticle sizes, zeta potential, polydispersity index (PDI), and % entrapment efficiency (EE) of the LD extract entrapped in niosomes were 103.10 ± 8.63 nm, -24.81 mV, 0.327, and 94.03±0.48 %, respectively. Moreover, the LD extract entrapped in niosomes were exhibited the collagen biosynthesis stimulation on human dermal fibroblasts about 12.45 ± 0.73% and anti-melanogenesis activities on melanocytes (B16F10) cells of 16.49 ± 1.80%, which comparable to unentrapped extract (p < 0.05). Finally, the cytotoxicity on human dermal fibroblasts of the LD extract entrapped in niosomes (LD5O of 1.33 ± 0.02 mg/ml) was lower than the unentrapped extract (LD5O of 0.803 ± 0.001 mg/ml). The results suggested that the LD extract from Ludisia discolor entrapped in niosomes might be further developed as a whitening or anti-ageing agent for cosmetics and food supplements. Keywords: nanovesicles, whitening, anti-ageing, cosmetics, natural sources 5408

The 11th Rajamangala University of Technology International Conference Th“eRT1M1hth“UeRRT1aMD1jaUtrmhivTRainnDaggjrataiolvawminaUargndnitvgIonewarnlasoairtvdyUatoIinonf inTnv,eoeEcvrhcasnotiniotolyoonmgo,yyfEaITcnnotdeencrGohnmraneteyoinoSlanouTnagesdlcytCahGiInonrnonealtfeobeengrlreyenTnfDaeocceerthivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Effect of Riceberry (Oryza Sativa L.) Extracts on 5α-Reductase mRNA Inhibition and Stimulation of Dermal Papilla Cells Korawinwich Boonpisuttinant*, Sarinporn Udompong, Rattikarl Rakkaew and Saengnapa Thongsa1 Innovative Natural products from Thai Wisdom (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi (RMUTT), Pathumthani 12130, Thailand * Corresponding email: [email protected] Abstract Hair loss is one problem (a condition that affects) of both male and female on person’s self- confidence and quality of life. The findings of novel therapeutics, such as bioactives derived from natural sources, are important to preventing baldness and increasing hair proliferation. In this study, the extracts from riceberry (Oryza Sativa L.) which is a cross-breed strain from the JaoHom Nin Rice and Khoa Dawk Mali 105, including the rice paddy (RPD), rice grain (RG), rice bran (RB), rice husk (RH) and rice plant (RP), were extracted using three different methods including boiling with water (W), maceration with 95% ethanol (E), and fermentation with Saccharomyces cerevisiae var. burgundy (WF). The main (most abundant) phytochemicals found in those extracts were xanthones. For antioxidation activity tests, the rice plant extracts from fermentation (RP-WF) extract had the highest free radical scavenging activity by DPPH assay (SC50 = 0.55 ± 0.07 mg/ml), metal chelating activity by ferrous ion chelating (FIC) assay (MC50 = 0.28 ± 0.25 mg/ml), and lipid peroxidation by ferric-thiocyanate (FTC) assay (LC50 = 2.05 ± 0.33 mg/ml), which were comparable to positive controls (p < 0.05). In addition, the RP-WF extract was inhibited of 5α-reductase mRNA expression on in DU-145 cells and while stimulated of dermal papilla cells proliferation. The results suggested that the RP-WF extract might be beneficial to be developed as hair loss treatment. Keywords: Oryza Sativa, antioxidant, hair loss, natural products 5419

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Whitening and Anti-Aging Effects of Aqueous Extract from Phyllanthus emblica L. Seed Korawinwich Boonpisuttinant*, Rattiya Boonbai and Wirinda Chomphoo Innovative Natural products from Thai Wisdom (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi (RMUTT), Pathumthani 12130, Thailand * Corresponding email: [email protected] Abstract Phyllanthus emblica L. (PE) belongs to the plant in the Phyllanthaceae family. In this study, the seed of PE was extracted by boiling it in distilled water (PE-SH). The PE-SH extract showed the free radical scavenging activity by DPPH assay (SC50 of 0.21 ± 0.01 mg/ml), metal chelating activity by ferrous ion chelating (FIC) assay (MC50 of 2.61 ± 0.12 mg/ml), and lipid peroxidation by ferric- thiocyanate (FTC) assay (LC50 of 3.18 ± 0.03 mg/ml). For whitening effect, the PE-SH extract at concentration of 0.1 mg/ml exhibited the anti-melanogenesis activity (18.13 ± 1.14%) on B16F10 cells, and the tyrosinase inhibition activity (IC50 of 0.15 ± 0.01 mg/ml), which was comparable to kojic acid (p < 0.05). For anti-ageing effect, the PE-SH extract at concentration of 0.1 mg/ml demonstrated the collagen biosynthesis stimulation (31.34 ± 2.31%), which was comparable to ascorbic acid (29.25 ± 1.18%) (p < 0.05), and the induction of SIRT1 and FOXO1 mRNA expression on human dermal fibroblasts (43.06 ± 11.92 % and 30.45 ± 10.18 %, respectively), which was significant comparable to resveratrol (p < 0.05). Moreover, the PE-SH extract showed no cytotoxicity on human dermal fibroblasts determined by MTT assay. According to the findings of this investigation, the PE-SH extract has the potential to be further developed as a cosmetic whitening and anti-aging agent. Keywords: Makhampom, antioxidant, anti-melanogenesis, natural products, collagen biosynthesis 520

The 11th Rajamangala University of Technology International Conference The 11t“h RRMajaUmTanDgraivlainUgntiovewrasirtdy Ionf nToecvhantioolnog, yEIcnotneronmatyioannadl CGornefeenreTneccehnology for “RTMhUeT11DtrhivRinagjtaomwaarnd gInanlaovUatnioinv,eErcsointyomoyf aTnedcGhrneeonSlouTgseytcahiInnnoatlboeglreynDfaoetrivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Development of Foundation Cream Containing Curcuma longa Extract NNataatakkamamool lTThhapaptitmimththamam1,,NNuuttttaawwaaddeeeeSSaanngguuaannssaakk1,, NNaapphhaatttthhaannaann PPhhuunnssiinn,1, KKhheemmjijriarajajarmrmkkoomm1, aanndd SSuurraaddwwaaddeeee TThhuunnggmmuunnggmmee*1* 1FFaaccuultlytyooffIInnteteggrraatitviveeMMeeddicicininee,,RRaajajammaannggaalalaUUnniviveerrssitiytyooffTTeecchhnnoolologgyyTThhaannyyaabbuurri,i, Pathum Thani, 12130, Thailand * Corresponding email: [email protected] Abstract This study aimed to develop foundation cream containing Curcuma longa extract. The C. longa powder was extracted with propylene glycol. The foundation formulations, cream base (F1), 2% extract (F2), and 6% extract (F3) were prepared by the beaker method. The formulations were evaluated for their physicochemical parameters like color, odor, pH, viscosity, spreadability, color dispersion, and washability. The quality of curcumin in the formulation was investigated by High- performance liquid chromatography (HPLC). Also, the formulations were evaluated against UVB and UVA rays via sun protection factor (SPF) and PA, respectively. The results showed that the color was beige. pH was compatible with skin in the range 4.26 - 4.34. The concentration of the extract in formulations was not different in viscosity. All formulations were easily spreadable and hardly washable. The pigments were evenly dispersed. The curcumin was found in formulations containing the extract following the percentage of extract loading. The SPF of F3 was higher than F2 and F1, respectively, while PA was not different. Therefore, the percentage of C. longa extract was affected by photoprotective action. In addition, they showed good physicochemical properties. However, the stability and safety of formulations should be performed for ensuring a suitable product launch. Keywords: Foundation cream, Curcuma longa, Curcumin, Sun protection factor 531

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Comparison the Inhibitory Effect of Vernonia amygdalina Leaf Extracts on Scavenging Free Radical, Tyrosinase and Amylase Activities Supawadee Patathananone1*, Rattana Meekrasae1, Songsak Srikongton1, Khanittha Panyawai1, Wuttisak Kunu2 and Boontida Uapipatanakul1 1Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani, 12110, Thailand 2Program of Veterinary Technology and Veterinary Nursing, Faculty of Agricultural Technology, Rajabhat Maha Sarakham University, 44000, Thailand * Corresponding email: [email protected] Abstract The cytotoxicity and instability are the limitations of using bioactive compounds as the ingredients of cosmetic and pharmacology products. This study aims to study the properties of Vernonia amygdalina leaf extracts in terms of their antityrosinase, anti-amylase, and antioxidant activities. The aqueous solvent system (70% v/v methanol, 70% v/v ethanol, and 70% v/v acetone; group A) and the order polarity of the organic solvent system (hexane, ethyl acetate, isopropanol, and ethanol; group B) were used for the extraction processes. All extracts were determined antityrosinase and antioxidant activities using the modified dopachrome method and DPPH assay. The inhibitory effect on -amylase was studied by UV-Vis spectrophotometer. The extracts of group A (BTL70ME, BTL70ET, BTL70AC) showed the potential of antityrosinase and antioxidant activities higher than crude extracts of group B (BTL_Hexane, BTL_Etylacetate, BTL_Isopropanol, and BTL_Ethanol). On the other hand, the extracts of group B displayed the inhibitory effect on -amylase higher than the extracts of group A. Total phenolic contents of BTL70ME, BTL70ET, BTL70AC were represented for 64.42 ± 5.15, 61.60 ± 6.48, and 67.03 ± 4.17 mg gallic acid/g extract, respectively. In addition, total flavonoid contents were shown as 56.52 ± 8.70, 47.83 ± 11.65, and 65.22 ± 16.65, respectively. Polyphenols, flavonoids, saponins, terpenoids, steroids, and cardiac glycosides were the essential bioactive compounds found in the extracts of group A. These phytochemicals could express the synergistic effects in vitro, including interrupting the conformational changing of tyrosinase to binding with the substrate. The extracts of group A could promote as the cosmetic ingredient for antiaging and anti-melasma. Moreover, phytochemicals of group B could use for reducing blood glucose levels in diabetes. Keywords: Bitter leaf; Antioxidant; Antityrosinase; Phytochemical; Tyrosinase Inhibitor 542

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“hUeRRT1Ma1DjaUtrhmiTvRainDnaggjrataiovlmawinaUagrnndtigovInwearnlasaoirtvdUyatIoninofinnTv,oeeEcvrhacsnotiintooylonomgo, yyfEaITcnnoetdnecrGohnmrnaeytoeinSolaonunTgasedlytcaCGhiInnornoneatlfeboeenlgrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Total Phenolic Content, Antioxidant and Anticancer Activity of Calophyllum inophyllum Luksamee Vittaya1*, Chakhriya Chalad 1, Juntra Ui-eng 1 and Sittichoke Janyong 2 1 Department of General Education, Faculty of Science and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang 92150, Thailand 2 Department of Marine Sciences and Environment, Faculty of Science and Fisheries Technology, Rajamangala University of Technology Srivijaya, Trang 92150, Thailand Abstract Calophyllum inophyllum is an important medicinal plant in the Calophyllaceae family. Various parts of the plant show different pharmacological properties including anti-inflammatory, antidiabetic, antioxidant, antibacterial and anticancer activities. The present study was performed to analyze the total phenolic content (TPC) of the flower, fruit, leaf, twig and bark of C. inophyllum extracted with hexane, ethyl acetate and methanol in order to polarity of solvents. Free radical scavenging activities were evaluated by two methods, 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity (DPPH) and 2,2/-azinobis-3 ethylbenzothiazoline-6-sulfonic acid (ABTS). The anticancer activity was carried out from the cell growth inhibition determined using a resazurin microplate assay (REMA). Total phenolic contents were presented significantly in the ethyl acetate and methanol extracts higher than that of the hexane extracts. In addition, the ethyl acetate and methanol extracts of all parts showed a higher percentage of radical scavenging activity than the hexane extracts when measured by DPPH and ABTS. The positive correlation was established by the Pearson correlation test between two methods of free radical scavenging activity DPPH and ABTS (r=0.945). Interestingly, the free radical scavenging activity depends on structure-relationship of phenolic with positive correlation: r=0.902, 0.872, 0.720 for DPPH observed in flower, leaf and twig and r=0.900, 0.758, 0.885, 0.752 for ABTS observed in flower, fruit, leaf and twig, respectively. The anticancer activity was tested against the MCF7 human breast cancer cell line and the NCI-H187 human small cell lung cancer cell line. Leaf extracts were significantly active against NCI-H187 cancer cells. Keywords: Calophyllum inophyllum, Phenolic content, Antioxidant, Anticancer 553

The 11th Rajamangala University of Technology International Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” SESSION 4 Nanotechnology and Applied Materials 56

The 11th Rajamangala University of Technology International Conference The “1R1thMRUajTamDarnivgianlga UtonwivaerrdsiItnynoof vTaetcihonno,lEogcyoInnotmerynaatniodnGalrCeeonnfTereecnhcneology for T“hReM1U1TthDRriavijnagmtoawnagrdalIannUovnaitvioenr,sEitcyonoofmTyeacnhdnGorSleouegnsytTaeiIncnhatnbeolrelnoDgayetifvoernloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Agricultural and Environmental Applications of Plasma Discharges over Water Surface Generated by Pulsed Power Generator Katsuyuki Takahashi1,2* and Koichi Takaki 1,2 1 Faculty of Science and Engineering, Iwate University, 4-3-5 Ueda, Morioka Iwate 020-8551, Japan 2 Agri-Innovation Center, Iwate University, 3-18-8 Ueda, Morioka Iwate 020-8550, Japan * Corresponding email: [email protected] Abstract Electrical pulsed discharge plasma produces various powerful oxidizing agents, such as hydroxyl radicals and ozone, which have high oxidation potential. These species play an important role in the decomposition of persistent organic compounds in wastewater. Because highly concentrated oxidants are directly produced inside plasma, plasma realizes high speed wastewater treatment without pretreatment of samples such as pH adjustment. The pulsed discharge plasma generated over water surface and inside bubbles is highlighted as a highly efficient method for plasma generation and radical supply into wastewater. In this paper, the physical and chemical properties of the discharge plasma generated over a water surface are described. The decomposition of persistent organic compounds dissolved in wastewater, such as 1,4-dioxane, formic acid and dichloromethane, by plasma discharge is demonstrated, and their mechanisms are discussed. These persistent compounds, which have strong toxicity and stability, can be efficiently decomposed and removed quickly from solutions by plasma treatment. Furthermore, the treatment of nutrient solutions used in hydroponic systems for plant cultivation is also introduced as a novel application of plasma, and the effects of bacterial inactivation, decomposition of allelochemicals and improvement in plant growth by plasma are demonstrated. Keywords: Plasma, Wastewater, Nutrient solution, Advanced oxidation process, Hydroxyl radical. 575

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMTUhUTeT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Bioproduction of Renewable Feedstocks from Biomass using Engineered Microbes Yuji Aso*1* 1 Department of Biobased Materials Science, Kyoto Institute of Technology, 1 Hashigami-cho, Matsugasaki, Kyoto 606-8585, Japan * Corresponding email: [email protected] Abstract Among diols, 1,2-propanediol (1,2-PDO) is one of the most versatile chemicals with two optical isomers, R-1,2-PDO and S-1,2-PDO. These compounds can be produced from glucose by engineered microbes possessing 1,2-PDO synthetic genes pct, pduP, and yahK, which encode propionate CoA-transferase, aldehyde dehydrogenase, and alcohol dehydrogenase, respectively. 1,2- PDO can be produced in engineered microbes via a pathway in which glucose is first converted to D- and L-lactate, followed by the synthesis of R- and S-1,2-PDO from D- and L-lactate, respectively, in which cofactors such as acetyl-CoA, NADH, and NADPH are required. This suggests that microbes producing the 1,2-PDO precursor lactate at a high titer are suitable as production hosts for 1,2-PDO production, and that R- and S-1,2-PDO can be separately produced in D- and L-lactic acid producers, respectively. Therefore, the present study demonstrated the production of R- and S-1,2-PDO using engineered Lactococcus lactis NZ9000 and AH1, respectively, through an exogenous 1,2-PDO production pathway, according to a previously reported demonstration using engineered E. coli. The L- and D-lactic acid-producing L. lactis strains NZ9000 and AH1 were transformed with the plasmid pNZ8048-ppy harboring pct, pduP, and yahK genes for 1,2-PDO biosynthesis, resulting in L. lactis LL1 and LL2, respectively. These engineered L. lactis produced S- and R-1,2-PDO at concentrations of 0.69 g/L and 0.50 g/L with 94.4% ee and 78.0% ee optical purities, respectively, from 1% glucose after 72 h of cultivation. Both 1% mannitol and 1% gluconate were added instead of glucose to the culture of L. lactis LL1 to supply NADH and NADPH to the 1,2-PDO production pathway, resulting in 75% enhancement of S-1,2-PDO production. Production of S-1,2-PDO from 5% mannitol and 5% gluconate was demonstrated using L. lactis LL1 with a pH-stat approach. This resulted in S-1,2-PDO production at a concentration of 1.88 g/L after 96 h of cultivation. Keywords: 1,2-propanediol, Lactococcus lactis, fermentation, engineered microbes 586

The 11th Rajamangala University of Technology International Conference Th“eTR1M1h“tehURRT1Ma1DjUtahrmiTvRaiDnanggjraiatvolmaiwnaUagrnndtigovIwanerlnaasoridtvUyaItnoinofinnvTo,eevEcrahsctnoiitnooylonomo,gfEyy TcaInonetndceorGhmnnraeyoteiSlnaoounnTgsadeytlcaGChiInnroneaontelbfeonelrgrenyeTDnaefocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Fine Bubble Technology and It’s Applications Kiyoshi YOSHIKAWA Counselor, Rajamangala University of Technology, Thanyaburi. Pathumtani, Thailand Professor Emeritus, Institute of Advanced Energy, Kyoto University, Uji, Kyoto, Japan [email protected] Abstract The Fine-bubble(FB) technology is an emerging technology developed aggressively in Japan, and its origin can date back to The 2005 World Exposition, Aichi, Japan, where both fresh water and sea water fishes were shown swimming in the same aquarium filled with fine bubble water( youtube with English narrations at https://www.youtube.com/watch?v=mvBiHcWT1B8) After many experiments of various kinds, it is found now that the FB has very unique functions and applicable to versatile fields as shown below. Although still, some basic features are not clearly verified, but nevertheless, application fields have made great progress. In this talk, some of the important and interesting fields appropriate to Thailand will be introduced. Environments: • Factory wastewater treatment, •Sludge volume reduction, •Water purification (control of algae, etc.), •Improvement of water quality (measures against hypoxia, etc) by Microbial activation, Highly efficient reaction of gas, Reaction promotion, Highly efficient dissolution of oxygen. Agriculture: •Growth promotion, •Increased yield, •Quality improvement by Bioactive effect. Food: •Keeping freshness, •Antioxidant, •Reduction of drug usage by Deoxidizing effect (gas replacement), Effective use of gas by improving reactivity. Fisheries: •Growth promotion, •Decrease of mortality rate, •Keeping fish fresh by Highly efficient dissolution of oxygen, Bacterial suppression, Immunity improvement, Deoxidizing effect (gas replacement). Cleaning: •Toilet cleaning, •Washing clothes, •Cleaning metal parts, •Food cleaning by Improved permeability, Peeling effect, Physisorption, Peeling effect, Floating separation, Sterilization using gas. Industry: •Precision peeling, •Silicon wafer thin film separation by Improved permeability. Beauty: •Hot spring (bubble bath), •Face wash / scalp wash, •Shower head, •Nanotech cosmetics by Hot bath effect, Oil removal (permeability), Improved permeability. Others: •Medical and medical equipment, • Ships, • Energy by Sterilization by using gas, Improved propulsion (decreased resistance), Improved combustion efficiency. Keywords: Fine bubbles, Application to versatile fields, Sterilization, Accelerated growth of plants, Reactive oxygen species (ROS) 597

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Optically Functional Nanomaterials Synthesized by One-Step Sonochemical Process for Optical Energy Harvesting Applications Wisanu Pecharapa* College of Materials Innovation and Technology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, 10520, Thailand * Corresponding email: [email protected] Abstract Sonochemical synthesis process is one of effective method for preparing various optically functional nanomaterials without further post treatment process. Uniform F/Sb-codoped SnO2 conductive nanoparticles were synthesized by single-step sonochemical process without further heat treatment. With good infrared absorption due to surface plasmon resonance property, these conductive nanoparticles could be proposed as potential materials for infrared and thermal shielding applications. This facile technique was proposed for synthesizing various types of ultraviolet- and visible-driven photocatalysts including Zn-, Mn-, Co-doped TiO2, ZnTiO3 and Mn-, Yb-, Er-doped BiVO4 nanoparticles with enhanced photocatalytic performance. Ultrosonic-assisted process could be also an alternatively cost-effective process for synthesizing cellulose nanostructures from sugarcane bagasse that can be applied as ultraviolet shielding material. Keywords: Optical material, Sonochemical process, Optical energy harvesting 6508

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“hUeRRT1MaD1jaUtrhmiTvRainnDaggjrataiolvmawinaUagrnndtigovInewarnlasaoirtvdyUatIoinnofinnTv,eoeEcvrhcasnotiinotoyloonmgo, yyfEaITcnnotednecrGohnmrnaetyeoinoSlaonuTnagesdlytcaChGiInonrnoneatlfeobeenglrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation of Nanoparticles/PLLA Nonwoven through Melt-Blown Process NanjapNorannRjaopuonrgnpaRisoaunn1*g,pPaainsnaanr1a*i,RPuagn-ngaararni1R, Suugn-enegHaartnh1a,iSwuasneeeewHonagt1h,aTihwaansaneeRwuoeanngk1h,ong2 Thanan RueaNnkatheeonSgri2saNwaatte1eanSdrNisaarweeartu1taJnadriyNaaprueneyrau1*t Jariyapunya1* 1 Department of Textile Engineering, Faculty of Engineering 1Department of Tex2tMileecEhnagtrinoeneicrsinEgn, gFianceuelrtiyngo,f FEancguilntyeeorfinTge,cRhanjiacmalaEndguaclaatUionniversity of Technology Rajamangala UnTivheurnsyitayboufriT, eTchhaniolalongdy Thunyaburi 2Mechatronics Engineer*inCgo,rFreascpuoltnydoinfgTeecmhaniilc:anl aEndjuacpaotrionn_,[email protected] University of Technology Abstract * Thunyaburi, Thailand Corresponding email: [email protected] Nowadays, air pollution problems are going to severe condition. Mask is one essential afAocbrcmsetsarstaoiocNrytnowoafdaoPdpaotyleysd(,Lta-oilrapcptrioodtleelu)c(ttPiotLhnLoApser)oobmfleihmxaesrdmawfrueitlhgpaoacirnttiigvceutlopaatesrseti.vcelTerhes.isTcohrenesdeeiatfifroecnch.tivaMiemnaessksstoiosfstonunadneyoepthsaseretinwctlieeabsl daciscpeesrssoerdy iandofipbteerds tios pcorontteinctgetnhtosuepoonf hpaarrmticfluel-opbajretcictuilnatteersa.cTtihoins, rreeslaetairncgh taoimthse tosursftaucdey atrheea wanedb pfoerrmceanttiowneoigf hPtoolyf(aLd-dlaitcitoidne. )T(PhLe LfaAb)ricmatiixoendowf iuthltraac-tfiivneepnaorntiwcloevs.enThweaesffpercotciveeedneedssboyf unsainnogpaarntiocvleesl sdpisinpnerisnegdteinchfniobleorgsyiscaclolendtinmgeelnt-tbulopwonn pspairntincilneg-o. bPjLecLtAinwteirtahctaiovne,ryrehlaigtihngmteolt-tfhleowsurraftaececoanrteaainainndg 0p,er0c.5en, at nwde1igwhtt%ofoafdmdiettiaolno.xTidhee nfaabnroipcaatritoicnleosfcuolutrlad-bfiensepnuonniwntoovtehne wwaesb pforormce.eUdendfobrtyunuasitnelgy,ahnigohveerl cspoinntnenintgwtaeschnnoot lpoogsysibcalellbedecmaueslet-obflouwnnevsepninnensisn.gT. hPeLrLmAal wexitpheraievnecreyshoifgahllmfieblet-rfslowwerreactehacroancttaeirnizinedg b0y, 0.u5s,ianngd d1iwffet%renotfiaml estaclaonxniindge ncaonloopraimrtiectleers caonudldxb-reasypudnififnratocttihoenw. eTbhfeorrmel.aUtionnfosrhtiupnaoteflyp,hhyisgihcearl pcoronpteenrttiwesassuncoht apsosfsaibbrliecbweeciaguhste, ofifbuenredvieanmneetsesr. dTihsterrimbuatlioenx,pearnidenmceosrpohfoallolgfiybewrasswaelrseocihnavreascttiegraitzeedd. Pbyroduuscintigondoifffethreenutilatrla-sfciannenfiinbger cwoalosrsimucecteesrsfaunldfoxr-arallysadmifpfrleasc.tiIotnc.ouTlhdebereolabtvioionushsliyp soeefnpthhyastitchael opbrotapienretidesfisbuecrhs aws efraebraiclmwoesitghnta,nfoib-seirzediawmheetnercdoimstpriabruetdiown,itahndnomrmoraplhoPlLoLgyAwfaibsearls(omienlvtessptiignantiendg. pPrroocdeuscst)ioinn ofifgtuhreeu1lt.raT-hfienerefsiubletrswhoaws seudctcheastsftuhlefodriaamllestearmopflefsi.bIetrcdoiusltdribbueteosbvaipopursolxyimseaetneltyha0t.1th-6e mobitcarionnesd. fTibheerssiwzeereofalfmiboesrt tnreanndoe-dsizteo wbheensmcaolmlerpaarcecdorwdiitnhg ntoormnaalnoPpLaLrtAiclefisbecron(mceenlttrastpioinnn.inIng cporonccelusss)ioinn, tfhigisurfeun1d.aTmheentraelsruelstesahrochwecdoutlhdabt ethaedadpiatambeletewr iothf afinboetrhedrisntarinboupteasrtiacpleprtoyxpiemtaotemlyak0e.1th-6e fminicernoensss.stTruhcetusriezefoor fa ffiilbterartitornensdyesdtemto. be smaller according to nanoparticles concentration. In conclusion, this fundamental research could be adaptable with another nanoparticle type to make the fineness structure for a filtration system. สขี าว-ดํา Figure 1 Comparing the cross-sectional configuration of PLLA fibers manufactured by standard melt spinning and melt-blown processes to generate ultra-fine fibers under specific spinning conditions Figure 1 Comparing the cross-sectional configuration of PLLA fibers manufactured by standard melt spinning and melt-blown processes to generate ultra-fine fibers under specific spinning conditions Keywords: Melt-blown nonwoven, Biobased polymer, Nano-particles, nano fiber, Biobased Keywords: Mnoenlwt-bolvoewnn nonwoven, Biobased polymer, Nano-particles, nano fiber, Biobased nonwoven 6519

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Development of Rotational Molding Products from PP Packaging Waste Ektinai Jansri1 and Narongchai O-Charoen 2* 1 Department of Polymer Materials Technology, Faculty of Agricultural Product Innovation and Technology, Srinakharinwirot University, Nakhon Nayok, 26120, THAILAND 2 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani, 12110, THAILAND * Corresponding email: [email protected] Abstract The objective of this research was to study the influence of polypropylene particle size on flake characteristics in rotational molding process. The use of polypropylene sample in this research was derived from a disposable packaging. The process started with crushing waste plastic packaging and sorting it into small (rPP-S), medium (rPP-M) and large (rPP-L) sizes. Then, they were analyzed in the size distribution and the shape of particles. The specimens were then molded in a uniaxial rotational molding machine at a rotation speed of 7 rpm using a forming temperature of 210 °C. Then, the samples were observed and recorded the phenomena that occur during the molding and testing of the specimen properties. The results revealed that different sizes of polypropylene particles after crushing directly affected the rotational molding process while in the solid state involved in motion and the heat transmission of the particles. Additionally, the liquid state was associated with the formation of air bubbles in the workpiece. Comparing to the formability, rPP-S showed a high formability and compressive strength higher than 20 and 30% of rPP-M and rPP-L, respectively. Keywords: Rotational molding, Recycled polypropylene, Packaging waste 620

The 11th Rajamangala University of Technology International Conference Th“eRT1M1hth“UeRRT1aMD1jaUtrhmivTRainnDaggjrataiolvamwinaUagrndnitvgoInewarnlasoairtvdyUatoIinonfinTnv,eoeEcvrhcasnotiniotoyloonmgo,yyfEaITcnnotednecrGohnmranetyeoinoSlanouTnagesdlcytaChGiInonrnonealtfeobeengrlreyenTnfDaeocceetrhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Development of a Paper-Based for Detection of Carbofuran Based on using Copper Nanoparticles Supattra Arsawiset and Siriwan Teepoo* Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Klong 6, Thanyaburi, Pathumthani, 12110, Thailand * Corresponding email: [email protected] Abstract This research is interested in the construction of a rapid measurement strip for the determination of carbofuran using inhibition biosensor techniques. The detection of carbofuran was achieved by using the enzyme acetylcholine esterase (AChE). The AChE catalyzes the hydrolysis reaction of acetylcholinechloride (AChCl). The product is choline, then choline oxidase (ChOX) is added to get betaine aldehyde and hydrogen peroxide (H2O2). Then H2O2 couples with o-dianisidine in the presence of copper nanoparticles (CuNPs), resulting in a brown color. The color intensity of the detection zone on the paper was imaged using a smartphone and the colorimetric results were analyzed with the program Color Picker. Under optimum conditions, the developed paper-based was found to detect carbofuran with the proposed has a linear range of 0.05-3.0 ppm. The analysis time was 10 min for detection. The precision of the paper-based was evaluated by studying repeatability and reproducibility for the detection of carbofuran which yielded an relative standard deviation (RSD) was 0.36% and for reproducibility. The RSD was 0.52% (n=7) indicating the potential to be good for practical applications. Compared to other methods, this assay was advantageous in terms of its low detection limit, time savings, high stability, and easy of portable, which facilitated rapid on-site environmental monitoring with a smartphone, offering an alternative to conventional methods. Keywords: Carbofuran, Hydrolysis reaction, Copper nanoparticles 631

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Electrospun Cellulose Acetate/Maleic Acid Functionalized Gold Nanoparticles as Pb(II) Ions Colorimeter Sensor Strip Pimolpun Niamlang1*, Chularat Iamsamai1 and Piyachat Chuysinuan 2 1 Department of Materials Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, Phutthamonthon, Nakhonpathom 73170, Thailand 2 Laboratory of Organic Synthesis, Chulabhorn Research Institute, Bangkok 10210, Thailand * Corresponding email: [email protected] Abstract This work is a development of colorimetric sensor strip from electrospun nanofibrous containing modified gold nanoparticles, including studies of gold nanoparticle synthesis and surface modifications for using as colorimetric sensor and cellulose acetate electrospun fiber preparations as substrate for loading those of gold nanoparticles. The preparations of gold nanoparticles were using citrate reduction and modified with maleic acid (MA-GNPs). The results showed that MA-GNPs was high selective to Pb2+ more than other ions (Co2+, Cu2+, Hg2+, Ni+). The solutions changed from red to blue or purple color after the addition of Pb2+ due to nanoparticle aggregation, in accordance with UV-Vis spectrometry results. A characteristic band of GNPs and MA-GNPs were observed at approximate 520 nm. After the addition of Pb2+, the intensity of solution decreased gradually at 520 nm and a new band emerged at about 600 nm. The cellulose acetate nanofibrous were fabricated by electrospinning process, the effect of polymer concentrations, solvent ratios, and process condition were studied. The optimum condition for substrate fabrication was 15% w/w of polymer solution with electrospinning voltage of 15 kV, distance between needle and collector of 15 cm, and collecting time of 48 hours. For study of changing in color of prepared strip, after contact with Pb2+ in different concentrations, the strip changed from red to blue as same as in solution form. Testing with water samples revealed that the strip did not change color when tested with DI water, and when tested with wastewater obtained from a battery factory, a discoloration of the strip from red to purplish blue was observed. The lead concentration was found, approximately 40 ppm. The results demonstrated the ability of the discolored strips to detect the initial lead ion content which can be developed further in the future. Keywords: Gold nanoparticle, Lead detection, Electrospinning process, Colorimetric sensor, Sensor strip. 642

The 11th Rajamangala University of Technology International Conference The 11t“hRRMajaUmTaDngraivlainUgntiovwerasritdy IonfnToecvhantioolnog, yEIcnotneronmaytioannadl CGorneefenreTneccehnology for “RTMhUe T11DtrhivRinagjtaomwaarndgInanlaovUatnioinv,eErcsoitnyomoyf aTnedcGhrneoenSlouTgseytcahiInnnoatlboelgreynDfaoetrivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Effects of Modified Palm Oil and Surface Treatment on The Properties and Biodegradability of The Thermoplastic Starch Piyawan polpanich1a, nKduKllauwllawdeaedeSeunSgusnagnsiat1n*it* 1DDeeppaarrttmmeenntt ooff MMaatteerriiaallss aanndd MMeettaalllluurrggiiccaall EEnnggiinneeeerriinngg,, FFaaccuullttyy ooff EEnnggiinneeeerriinngg,, RRaajjaammaannggaallaa University of Technology Thanyaburi, Thanyaburi, Pathumthani, THAILAND *Corresponding email: [email protected] Abstract The application of thermoplastic starch with modified palm oil is to produce disposable food packaging with the properties of moisture resistance, dimension stability and heat resistance. These probably have effects on biodegradation. Therefore, this research aims to study the biodegradability and mechanism of thermoplastic starch packaging by using a co-digestion system with organic waste generated in the household. The thermoplastic starches specimens were prepared from the extrusion and compression process. Some of them were mixed with 5 phr. of modified palm oil that was prepared by ultraviolet irradiation. The results show that addition of modified palm oil into thermoplastic starch allows specimens to absorb less water and maintain their shape for more than 18 hours. Subsequent, the typical thermoplastic starch specimens with 5 phr. modified palm oil were treated with sodium hydroxide solution in concentration of 0.5 molar. The specimens were composed with organic waste in a specially designed fermentation tank. As the results, treated specimens caused in higher surface area that the microorganisms can fix with and causing faster degradation than without pretreatment and biodegradation occurs at a higher rate as well. The study also found that the typical specimens have been digested completely in 2 months whereas the specimens with modified palm oil can be digested in 3 months. Finally, the application of thermoplastic starch with modified palm oil can be composted completely via co- digestion with organic wastes using the low- cost fermentation tank model. Keywords: Thermoplastic Starch, Biodegradation, Co-digestion, Organic Waste 653

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMTUhUTeT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Sound Insolation of Sustainable Sound Absorber Material from Natural Rubber/Natural Fiber Nuorn Choothong* Department of Materials Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, Nakornprathom, Thailand *Corresponding email: [email protected] Abstract The sound insulation properties of sustainable sound absorber materials made from natural rubber latex and pineapple leaf fiber were investigated. The surface of pineapple leave fiber was treated with alkaline treatment individually. The random fiber range was mixed with natural rubber latex in five different fractions various from 10% to 50% with an increment of 10%. The thickness of each sample was kept constant at 50 mm. Method used to measure sound absorption coefficient () is Impedance Tube Method (ASTM E1050-09), which has been use for measuring the sound absorption and sound transmission loss. It was found that the sound absorption coefficient (SAC) increases with the fiber fraction. The sound insulation test results showed that the obtained product of natural rubber with pineapple leave fiber had a promising possibility that could be used as a potential material for the development of sustainable sound absorber material. Keywords: Natural rubber latex, Pineapple leaf fiber, Sound insulation property 664

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“hUeRRT1Ma1DjaUtrhmiTvRainDnaggjrataiovlmawinaUagrnndtigovInwearnlasaoirtvdUyatIoninofinnTv,oeeEcvrhacsnotiintooylonomgo, yyfEaITcnnoetdnecrGohnmrnaeytoeinSolaonunTgasedlytcaCGhiInonrnoneatlfeboeenglrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Helical High-Density Polyethylene Lawn Mower Anothai Pholsuwan1*, Kawita Chattrakul1 and Somchay Poungsubsin2 1 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani, THAILAND 2 Civil Engineering Division, Faculty of Technical Education, Rajamangala University of Technology Thanyaburi, Pathumthani, THAILAND Corresponding email: [email protected] Abstract Commercially available lawn mowers with square and round cross-sections are made of polyamide or nylon material. A fabrication extrusion temperature 240 °C was used. The thermal transition immediately sharp and melts the solid, making it difficult to form. A study comparing the use of lawn mower line produced from high-density polyethylene at feed, compression, metering and die sectional molding temperatures of 140, 150, 160 and 180 °C, respectively. The mechanical properties of tensile strength, the modulus of mechanical properties, also includes the percentage of elongation at break. It was found that the nylon material had a higher tensile strength than that of the high-density polyethylene helical material at all angles, with a 45- degree helical angle of tensile strength and the highest percentage of elongation before fracture. At a 30-degree helix angle, Young's modulus is also highest. In the experiment to mow the grass species of Zoysia matrella in the same cutting direction, size 2 square meters, average height 10 centimeters, with a rotor cutting speed of 5000 revolutions per minute, it was found that at a 45-degree helix angle, it was able to cut the grass with weight and softness than using nylon with square cross section. Keywords: Lawn mower, Helical high-density polyethylene, Nylon lawn mower 675

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT DriivviinnggtotowwaardrdInInnonvoavtiaotni,oEnc, oEncoomnyoamnyd aGnrdeeGn rTeeecnhnToelcohgynfoolrogy for The 11th Rajamangala University oSfuTsteSaciunhsatnbaolienloDagbeyvleeIlDonpetmveeerlnnota”ptmioenta”l Conference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Estimating Properties of Keratin Fibres through Multi-Analytical Techniques Therakanya Sripho1*, Franz J Wortmann 2 and Gabriele Wortmann2 1 Department of Textile Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand 2 School of Natural Sciences, Department of Materials, The University of Manchester M13 9PL, UK *Corresponding email: [email protected] Abstract Keratin fibres are biopolymer with high degree of complexity. In this paper, only hard α- keratin was studied. This biomaterial can be mainly found in mammal hair such as wool, alpaca and human hair. Morphology of keratin fibres consist of outer part namely cuticle cells. Another part is cortical cells which is the majority component (around 90%) of fibres. Thus, biochemistry and cellular structure of cortical cells are directly influenced to properties of fibres such as crimp and thermal properties of fibres. Therefore, investigation feasible technique for fibres properties estimation from biochemistry and cortical cells arrangement is the objective in this study. In this study, cross-section of Merino wools with different diameters were studied by different analytical techniques. Firstly, two staining techniques namely Janus green and methylene blue staining were applied for optical analysis on light microscope. Stained cross-sections were further confirmed by AFM technique. Secondly, SEM-EDX was applied in order to investigate distribution of sulfur content by EDX mapping and line scan. Lastly, DSC was applied for thermal analysis. The fraction of ortho- and paracortical cells was estimated by DSC-deconvolution process. Similarly with previous studies, these optical analysis results suggested that smaller diameter reflects stronger cortical cells segregation between ortho-and para-cortical cells types. Bilateral arrangement in fine wools is directly related crimp property estimation. The correlation between cells arrangement and diameter was also found when AFM technique was applied. However, this study raised the new evident that meso-cortical cells might not be classified as another type of cortical cells. Thermal analysis showed three fitted of DSC deconvolution under the principle of Gaussian peak of width equation (R2 > 0.98). When thermal and optical analysis results were analyzed together, the result showed negative correlation between wool diameter and difference of denaturation temperature between ortho-cortical cells and para-cortical cells. This negative correlation was also found in difference of sulfur content between fine and coarse fibres. In conclusion, thermal analysis might be another technique that faster than optical technique to estimate the fractions of cortical cells in keratin fibres and diameter of fibres. Keywords: Keratin, Cortical cells, Thermal analysis, Optical analysis, AFM 686

The 11th Rajamangala University of Technology International Conference The 11“thRRMajUamTaDngraivlainUgntiovwerasritdyIonfnToevcahtnioolno,gEy cInotneornmaytiaonnadl GCroenefenreTneccehnology for “RTMheUT11DthrivRinagjatomwaarndgIanlnaovUatnioinv,eErcsoitnyomofy TanedcGhrneoeSnlouTgseytcahiInnnoatlbeolrgenyDafoetrivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” A Novel Synergist Flame Retardant: Nano Rutile Mineral Enhances Intumescent Coating for Structural Buildings PrasaPnraCshaanisCaheanirsiathe1n,rPitho1,oPmhpohoamt pThaaktsTakauklsvaikthu2l,vNithim2,aNAimzhaaAriz1hari1 and SaonrdapSoonragpPoanvgaPsuapvraeseu1p*ree1* 1Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi Pathumthani, 12110, Thailand 2Thai Nakornpaint and Chemical Company Limited, Minburi sub district, Minburi district, Bangkok, 10510, Thailand * Corresponding email: [email protected] Abstract Fire safety is a critical concern in buildings and construction for the protection of people and assets. The purpose of this research was to determine how nano rutile mineral behaved as a synergist flame retardant in intumescent coatings. A novel synergist flame retardant containing ammonium polyphosphate, pentaerytritol, melamine and aluminium trihydrate was incorporated into an intumescent coating to assess its effect on intumescent char morphology, fire resistance, and thermal performance, as well as a comparison to other intumescent paints currently available on the market. The mineral rutile was synthesized via a hydrothermal technique. The crystalline structure, chemical composition, size, and structure of the synthesized nano rutile mineral were then characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscope (SEM) and transmission electron microscope (TEM). Accounting to ISO 834-12 fire resistance test-element of building construction, an intumescent char was detected using a field emission scanning electron microscope (FESEM) and X-ray fluorescence (XRF) to analyze surface area and compound composition in a furnace at 927 oC for 60 minutes. The results revealed that rutile mineral had a rutile phase, but synthesized nano rutile mineral had a nanotube structure. After a fire test, FESEM and XRF analysis of the intumescent char residue revealed several char layers and a small foam structure in cross section in Intumescent Coating A. These included a multiple char layer that prevented heat transfer from the fire to the steel buildings and a small foam structure that isolated the steel substrate from external heat and provided fire protection. The nano rutile mineral in sample Intumescent Coating A affected the char's surface to create a ceramic-like protective coating. A high TiO2 content in intumescent char residue optimized the intumescent coating's thermal stability and, as a result, the char's thermal stability. The results suggested that nanotubes made from rutile material could increase fire resistance and had a substantial influence on the formation of ceramic layers in char structures. Keywords: Nano rutile mineral, Intumescent char residue, Synergist, Isolate, Foam structure. 697

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Effects of Temperature and Reaction Duration on the Synthesis of Activated Carbon from Water Hyacinth via Hydrothermal Method Varistha Chobpattana* and Tinutda Phonlam Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani, 12110, Thailand * Corresponding email: [email protected] Abstract Water hyacinth is one of the common aquatic plants, which oftentimes causes blockage to the irrigation system. Due to its abundance, it is encouraged to uncover the usage for the plant. In this study, the stem of water hyacinth was used for synthesizing activated carbon by hydrothermal method. The stem was dried and ground into powder before transferring into the hydrothermal reactor. The reactions were carried out at different temperatures between 150-250 °C and varied reaction time between 3-6 hours. Then, the synthesized biochar was activated by KOH and pyrolyzed at 800 °C. The chemical and physical properties of the samples were characterized by Fourier transform infrared spectroscopy and x-ray diffraction. In addition, dye adsorption tests were performed to investigate the possibility for further applications. Keywords: Water Hyacinth, Activated carbon, Hydrothermal 7608

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“heURRT1Ma1DjUatrhmiTvRainDnaggjraaitovlmawinaUagrnndtigovIwanernlaasoritvdUyaItoninofinnvT,oeeEvcrhacsnotiitnooylonomo,gyyfEaITcnnoetdnecorGhnmrnaeytoeiSnolaonunTgasdeyltcaGChiInnornoenatlefbeoenlgrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Green Synthesis of Carbon Dots from Nephelium Lappaceum Peels for Fluorescent Bioimaging Applications Poomirat Nawarat* (1 line space) Division of Industrial Material Science, Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon, Bangkok, 10800, Thailand * Corresponding email: [email protected] Abstract In this study, the carbon dots (CDs) with diameters of less than 12 nm were successfully synthesized from Rambutan (Nephelium lappaceum) peels with the simple and green method of microwave assisted. The chemical and optical properties of CDs were investigated by Fourier- transform infrared spectroscopy (FITR) and Ultraviolet-visible spectroscopy (UV-vis), respectively. Finally, the qualitative fluorescent property of CDs was demonstrated with optical microscopy in fluorescent mode. These are the evidence that our as-synthesized CDs have potential in fluorescent bioimaging applications. Keywords: Carbon dots, Microwave-assisted, Fluorescent bioimaging. 7619

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Development of Immunochromatographic Strip Test using Gold Nanoparticle for Detection of Malachite Green Residual in Aquatic Animals Khaunnapa Panapong and Siriwan Teepoo* Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathumthani 12110, Thailand * Corresponding email: [email protected] Abstract Malachite green has been used as an effective fungicide of aquatic animals. It can accumulate and persistence in treated fish tissue that is possibly both genotoxic and carcinogenic. EFSA’s Panel on Contaminants in the Food Chain assessed the risks to consumers from malachite green residue in food causing the human cancers. Specifically, the European Commission asked EFSA to evaluate whether a reference value of 2 micrograms (μg) of malachite green per kilogram of food would adequately protect public health. This study aimed to detect malachite green which residual in aquatic animals by developing immunochromatographic strip tests based on competitive immunosensor principles using gold nanoparticle as labeling. The parameter conditions were optimized for detection of malachite green. The results showed that the secondary antibody using for the control line was 0.4 mg/mL and 0.5 µL in volume. The optimal concentration and volume of malachite green antibodies colloidal gold nanoparticles conjugate were 0.04 mg/ml. The advantages of the developed immunochromatographic strip tests are short analysis time, low cost and easy to use for on-site analysis. Keywords: Malachite green, Gold nanoparticles, Immunochromatographic strip 720

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“hUeRRT1Ma1DjaUtrhmiTvRainDnaggjrataiovlmawinaUagrnndtigovIwnaernlasaoritvdUyatIoninofinnTv,oeeEcvrhacsnotiitnooylonomog, yyfEaITcnnoetdnecroGhnmrnaeytoeiSnolaonunTgasedlytcaCGhiInnornoneatlefboeenlgrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation of Thermochromic Bioplastic Composite Wires for 3D Printing Process AAnncchhaannKKhhaannkkhhuueeaann11,, KKaanntthhiittaa SSiittiissaann11,, KKaannkkaavveeee SSukthavorn1,1, NNoolllaappaannNNoooottssuuwwaann1, Chatchai Veranitisagul 2* and Apirat Laobuthee11** 1 Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand 2 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani 12110, Thailand * Corresponding email: [email protected] 1 and [email protected] 2 Abstract (Times New Roman font 12 points, bold) The main aim of this work was to fabricate the bioplastic composite filaments from poly(lactic acid) and two types of thermochromic additives (red and yellow colors). Masterbatch pellets were obtained by mixing each thermochromic powder with poly(lactic acid) pellets via a twin-screw extruder. The bioplastic composite wires were then prepared by a single screw extruder with mixing poly(lactic acid) and each masterbatch pellet in varied ratios ranging from 10, 20, 30, and 40 phr. The bioplastic composite wires were characterized by various techniques, including FTIR, SEM, XRD, UTM and DSC. The FTIR results suggested that the addition of thermochromic additives was not affected on functional groups of poly(lactic acid), while SEM results indicated the uniform dispersion of thermochromic particles in polymer. In addition, the bioplastic composite wires with thermochromic property in both low and high temperatures were successfully fabricated. Finally, the bioplastic composite wires were selected as 3D filaments for producing many products via 3D printer. Keywords: Thermochromic powders, Poly(lactic acid), 3D printer 731

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Development of Photoelectrocatalytic Techniques for Dye Degradation and Simultaneous Electricity Generation Thunyaporn Vongyara1, Jutarat Yamsuk1, Thimolruthai Srijaem1 and Chatchai Ponchio1,2* 1 Department of Chemistry, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani, 12110, Thailand 2 Advanced Materials Design and Development (AMDD) Research Unit, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand * Corresponding email: [email protected] Abstract Environment management and alternative energy are under continual development to achieve sustainable living. This research aims to develop a photoelectrocatalytic technique for simultaneously degrading organic dyes and generating electricity. A WO3/BiVO4 photoanode was prepared by a spin coating method and put into cooperation with a Cu2O photocathode prepared by an electrochemical deposition method. The applied potential, light intensity, pH value, and catalytic mechanism parameters were studied to optimize the organic dye degradation and electricity generation efficiency. The optimum condition was adjusted to an applied potential of 1.0 V, and visible light power was 25 W at the neutral pH value of the sodium sulphate electrolyte solution. We found that it was degraded 98% of organic dye in 3 h and generated a current density of 2 mA/cm2. The highlight of this research was the development of the cooperation of anode and cathode semiconductor electrodes to achieve high-efficiency photoelectrocatalytic cells for organic dye degradation and simultaneous electricity generation. The technique demonstrated high efficiency and a simple method suitable for environmental management and alternative energy applications. Keywords: Photoelectrocatalytic technique, Semiconductor electrode, Dye degradation, Electricity generation. 742

The 11th Rajamangala University of Technology International Conference Th“eRT1M1ht“hUeRRT1Ma1DjaUtrhmiTvRainnDaggjrataiolvmawinaUagrnndtigovInewarnlasaoirtvdyUatIoninofinnTv,oeeEcvrhcasnotiinotoylonomgo, yyfEaITcnnoetdnecrGohnmrnaetyeoinoSlaonunTagsedlytcaChGiInonrnoneatlfeboeenglrreyenTnDfaeocceterhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Novel Organic Additives with Fluorescence and Antibacterial Properties from Benzoxazine Monomers Grafted Poly(acrylic acid) Ratthapit Wuttisarn1, Kankavee Sukthavorn1, Nollapan Nootsuwan1, Chatchai Veranitisagul2,* and Apirat Laobuthee1,* 1 Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand 2 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani 12110, Thailand * Corresponding email: [email protected] 1 and [email protected] 2 Abstract Novel organic additives with dual properties as fluorescence and antibacterial properties derived from benzoxazine monomers (BZXs) and poly(acrylic acid) (PAA) were successfuly prepared. Three benzoxazine monomers containing a hydroxyl group as organic fluorophore namely, 3,4-dihydro-3-(2’-hydroxyethyl)-6-methyl-1,3-2H-benzoxazine (MEn), 3,4-dihydro-3-(2’- hydroxyethyl)-6-ethyl-1,3-2H-benzoxazine (EEn) and 3,4-dihydro-3-(2’-hydroxyethyl)-6-methoxyl- 1,3-2H-benzoxazine (MeEn), synthesized via Mannich reaction were used as starting materials to react with PAA to obtain poly(acrylic acid)-grafted-benzoxazines (PAA-g-BZXs) via esterification. FTIR and 1H NMR were used to identify the product structures, while UV-Vis and fluorescence spectroscopy were used to characterize the optical property of the products. The PAA-g-BZXs exhibited green emission under a UV lamp due to the benzoxazine pendent groups and also showed antibacterial activity against S.aureus and E.coli due to the carboxylic pendent groups of PAA. Only 1% by weight of PAA-g-BZXs was an appropriate amount for poly(lactic acid) (PLA) matrix to fabricate the golden PLA/PAA-g-BZXs composite wires without adding any pigments. Moreover, the obtained composite wires still showed a high performance in an optical property by changing in color from gold under visible light to blue-green under UV irradiation. Keywords: Benzoxazines, Poly(acrylic acid), Fluorescence property, Antibacterial property, Composite wire. 753

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMTUhUTe“TR1DM1rtiihvvUiinRnTggatDjotaowrwmiavaraidrnndIgngInantoolnavwoaUavtiarontdnii,ovIEnnec,rnoEsnoicotvoymantyooiSofamunnTysd,teSaaEGciunnrhcsdeaotnebaGnnolienorlToDeameegbcenyhyvleenaTIloDoennlpcoedtmhgveyenGerlnnfoorotla”perotmeginyoennfTotae”rlcChnoonlfoegryenfocer Sustainable Development” Nano-Silver Coated Ground Tea Leaves as a Hybrid Antimicrobial Additive for Poly(lactic acid) Composite Fibers and Textiles Benjarut Ketruam1, Kankavee Sukthavorn1, Nollapan Nootsuwan1, Chatchai Veranitisagul2,* and Apirat Laobuthee1,* 1 Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand 2 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani 12110, Thailand * Corresponding email: [email protected] and [email protected] 2 Abstract This research aimed to prepare bio-composite fibers from poly(lactic acid) (PLA) and nano- silver coated ground tea leaves (Ag/Tea) powder. Ag/Tea powder was synthesized by using ground tea leaves and silver nitrate as starting materials, and vitamin C as a reducing agent. Here, the masterbatches of PLA and Ag/Tea powder were prepared via a twin screw extrusion process. The fibers, which were varied masterbatch concentrations as 0, 5, 10, 15, and 20 phr, were fabricated via a melt spinning process. The samples were characterized by FT-IR, XRD, SEM, EDX, UTM and DSC. The composite fibers via a knitting process showed antibacteria of Staphylococus aureus and Escherichia coli. In addition, the obtained composite fibers were expected to apply for the oil spill cleanup. Keywords: Bio-composite fibers, Poly(lactic acid), Ag/Tea powder, Antibacterial, Oil spill cleanup. 764

The T11htheR1a1jtah mRaanjagamlaaUngnaivlaerUsitnyivoef rTseicthynoofloTgeycIhnntoerlongatyioInnatleCrnoantfeiornenacleConference “RTMh“UeRT1MD1UtrhiTvRinDagjrtaiovmwinaagrndtgoInwanlaaorvdUatIinnoinnv,oeEvrcasotiintoyonmo, yfEaTcnoedncGohmrneyeonlaoTngedychGInrnoetleoengrynTfaeoctrhionnoalol gCy ofonrference “RMUT Driving toward Innovation, EconSoumsytaainnadblGerDeeevnelToepcmhennot”logy for Sustainable Development” Design and Development of Needleless Electrospinning System NNithitihnianratrCt Chihtpitopnogn1g**,,PPeeeerraappaattJJaawwaaooaat1t,, JJeettttaawwaatt JJeeeennmmeekk1aannddKKitistsaannaaPPoommeeee1 1DDeeppaarrtmtmeennttooffTTeexxtitilleeEEnngginineeeerriningg,,FFaaccuultlytyooffEEnngginineeeerriningg Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand * Corresponding email: [email protected] Abstract Electrospun nanofiber is a widely used material owing to its high surface area and porosity with various applications such as adsorptive materials and membrane. Typically, there are two types of spinneret used in electrospinning system including motion and motionless spinnerets. Motionless spinnerets such as syringe with a conductive needle were generally used for producing nanofiber via electrospinning in laboratory scale. However, in production scale, motion spinnerets such as a rotating wire spinneret provided higher material productivity. In this research, needleless electrospinning system with the rotating copper wire spinneret was designed and developed to produce nanofiber. Four generations of the system design and development were operated. Cellulose acetate were used to produce nanofibers for the system test. It was found that the fourth generation design and development were successful to produce nanofibers. The uniformity, surface morphology and diameter of nanofibers were measured using optical microscope and scanning electron microscope. Additionally, effects of wire size and spinneret design to produce nanofibers was studied. Keywords: Nanofiber, Electrospinning, Needleless. 775

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation of Hydrogel from Nano-Silver Coated Poly(vinyl alcohol) and Silk Fibroin by Gamma Irradiation for Wound Dressing Application Chorpaka Inthong1, Apirat Laobuthee2, Prartana Kewsuwan3 and Chatchai Veranitisagul1* 1 Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Patumtani 12110, Thailand 2 Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand 3 Thailand Institute of Nuclear Technology, Nakhon Nayok 26120, Thailand * Corresponding email: [email protected] Abstract The hydrogels were successfully prepared via gamma irradiation on nano-silver coated poly(vinyl alcohol) (Ag/PVA) and silk fibroin. Firstly, Ag/PVA was prepared by mixing poly(vinyl alcohol), silver nitrate and L(+)-ascorbic acid in ethanol. Then, Ag/PVA, polyethylene glycol and silk fibroin were dissolved in distilled water. The solutions were irradiated by gamma ray at various doses from 20, 40, 60 and 80 KGy to obtain the hydrogel. The swelling, gel fraction, tensile and antimicrobial properties of the hydrogels were investigated. The results showed that by increasing the radiation dose, the swelling of the hydrogel decreased; while gel fraction increased. Tensile strength also increased when silk fibroin was added to the hydrogel. The hydrogel with 0.7 %w/w of Ag/PVA showed the best antimicrobial property. Keywords: Hydrogel, Nano-silver coated poly(vinyl alcohol), Silk fibroin, Gamma irradiation. 786

The 11th Rajamangala University of Technology International Conference Th“eRT1M1hth“UeRRT1aMD1jaUtrhmivTRainnDaggjrataiolvamwinaUagrndnitvgoInewarnlasoairtvdyUatoIinonfinTnv,eoeEcvrhcasnotiniotoyloonmgo,yyfEaITcnnotedencrGohnmranetyeoinoSlanouTnagesdlcytaChGiInonrnonealtfeobeengrlreyenTnfDaeocceetrhivoennlooalpolmgCyeonfont”rference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Sound Absorbing Polypropylene Nonwoven by Melt Jet Spinning Process Rutchaneekorn Wongpajan1, Suchalinee Mathurosemontri2* and Nichanan Phansroy2 1Department of Advanced Fibro-Science, Kyoto Institute of Technology, Matsugasaki Hashikamicho, Sakyo Ward, Kyoto 606-8585, JAPAN 2Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathumthani, THAILAND * Corresponding email: [email protected] Abstract The melt jet spinning method is one of the new environmentally friendly and high productivity nonwoven fabrication technologies. This process can control the fiber diameter and structure of the product by varying nozzle temperature without using toxic solvent and high voltage power. Several polymers can be fabricated nonwoven easily. In this research, polypropylene (PP) was selected to create a sound absorber. Sound absorption performance was tested by an impedance tube according to JIS A 1405-2 and ISO 10534-2. The result showed that fiber diameter and gap between fiber layers decreased with increasing nozzle temperature. The difference between these structures revealed the influence on the sound absorption coefficient (SAC), significantly. The small fiber diameter of nonwoven presented a higher SAC only in the low-frequency period, whereas, SAC in the high- frequency period increased with increasing fiber diameter. Moreover, the different volume density of the sample appeared an interesting result. Volume density was increased for each fiber size. The increase of volume density at high frequency resulted in a decrease in SAC. Keywords: Polypropylene, Nonwoven, Sound absorption, Melt jet spinning, Fiber diameter 797

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation of Flat Sheet Polysulfone Membrane Coated with PDMS for Carbon Dioxide/Methane Gas Separation at Low Pressure Arisa Jaiyu*, Julaluk Phunnoi, Passakorn Sueprasit and Nattaporn Chutichairattanaphum Expert Centre of Innovative Materials, Thailand Institute of Scientific and Technological Research, Khlong Luang, Pathumthani, 12120, Thailand * Corresponding email: [email protected] Abstract Biogas is a renewable energy that mainly consists of methane (CH4) and carbon dioxide (CO2). The CO2 in the biogas reduces energy efficiency and can cause pipeline corrosion. So, it is necessary to remove CO2 before using the gas in the system. In this study, flat sheet polysulfone membranes have been fabricated by a non-solvent induced phase separation method using water as a coagulant at room temperature. After drying the membrane via solvent exchange, the prepared polysulfone membrane was coated with a 3% Polydimethylsiloxane (PDMS) silicone elastomer solution in hexane with a contact time of 1 minute, and the membrane was cured at 100 °C for 2 hours. The pristine polysulfone membrane and polysulfone membrane coated with PDMS silicone elastomer were compared and characterized using EDS, FTIR, and SEM. The permeance of gas and the selectivity of CO2/CH4 at low pressure (1-2 bar) were determined using a single pure gas permeation experiment. The results showed that the flat sheet polysulfone membrane coated with PDMS had a dramatic increase in CO2/CH4 selectivity compared to the pristine polysulfone membrane. Keywords: Biogas, Membrane, Polysulfone, PDMS, Gas Separation 8708

The 11th Rajamangala University of Technology International Conference The 11th“RRaMjaUmTanDgrailvainUgnitvoewrsairtydoIfnTneocvhantoiolong,yEIcnotenronmatyioannaldCGornefeenrenTceechnology for “RTMhUeT1D1rthiviRngajtoawmaardnIgnanloavaUtinoniv, EercsointoymoyfaTndecGhreneonSloTuegscythaniInonaltobeglryenfDoaretivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation of Protect Foam by Biodegradable Plastic Suchalinee Mathurosemontri1**aannddNNicichhaannaannPPhhaannssroroyy1 1DDeeppaarrttmmeenntt ooff MMaatteerriiaallss aanndd MMeettaalllluurrggiiccaall EEnnggiinneeeerriinngg,, FFaaccuullttyy ooff EEnnggiinneeeerriinngg,, RRaajjaammaannggaallaa University of Technology Thanyaburi, Pathumthani, THAILAND * Corresponding email: [email protected] Abstract This research was studied on the processing conditions and additive ration for preparation of impact foam from biodegradable plastic as poly(butylene succinate) (PBS) in order to reduce an environmental problem from nondegradable polymers. The blowing agent as azodicarbonamide (ADC) was varied 0.5, 1 and 2 phr. While crosslinking agent as dicumyl peroxide (DCP) was varied 1, 3 and 5 phr, respectively. PBS foam specimen was fabricated by compression molding process and investigated their cell size, rheological property, drop weight property and flammability. The results showed that the suitable condition for foaming was fabricated under heating temperature 200°C for 10 minutes. The addition of ADC 1 phr revealed a suitable cell size. However, the incorporation of DCP 5 phr created the transformation from close cell foam to open cell foam structure. The open cell foam from DCP effect indicated a better drop weight resistance although DCP resulted high flammability. Keywords: Biodegradable plastic, Foam, Poly(butylene succinate), Chemical blowing agent. 8719

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Mask Filter Anti-Bacteria from Poly(butylene succinate) by Melt Jet Spinning Process Nichanan Phansroy* and Suchalinee Mathurosemontri Department of Materials and Metallurgical Engineering, Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand * Corresponding email: [email protected] Abstract In this work, the preparation of titanium dioxide (TiO2) coated poly(butylene succinate) (PBS) mask filters was studied. Non-woven PBS filters were first obtained using melt jet spinning process at nozzle temperatures of 260 – 270 oC and the distance from the nozzle to the collector of 60 cm. Morphology, fiber size, density and tensile properties of non-woven PBS filters were investigated. Scanning electron microscopy (SEM) images showed that the fiber diameter of non-woven PBS became smaller when the temperature was increased. The fibers were straight and smooth with wide fiber distribution. Then, TiO2 coated non-woven PBS filters were prepared by simple dip-coating. Polyethylene glycol (PEG) was added as binder varying amounts (0, 15, 20, 25 and 30% compared to 3% by weight TiO2). The morphology of the TiO2 coated non-woven PBS resulted in that abundant deposition of TiO2 and the particles of TiO2 were closely packed on the surface. According to X-ray diffraction analysis, the peaks corresponded to those of TiO2. The amounts of PEG binder did not affect the strength of the binding of TiO2 on the surface. Keywords: Poly(butylene succinate), Titanium dioxide, Melt jet spinning. 820

The 11th Rajamangala University of Technology International Conference The 11t“h RRMajaUmTanDgraivlainUgntiovewrasirtdy Ionf nToecvhantioolnog, yEIcnotneronmatyioannadl CGornefeenreTneccehnology for “RTMhUeT11DtrhivRinagjtaomwaarnd gInanlaovUatnioinv,eErcsointyomoyf aTnedcGhrneeonSlouTgseytcahiInnnoatlboeglreynDfaoetrivoenloaplmCeonnt”ference “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Effect of Modified Palm Oil on The Thermoplastic Starch/Corn Cob Powder/Bagasse Fiber Composite WaroonWsirai rJoaoknasribrui tJra1k*a, rNbaurtur*d,eNeaYruadkelaeyY1,aPkhlaicyh, aPyhaicWhaaynanWasoa1nnanasdoSomkiat and SoTmhkitiiaptoTohmitdiepcohoam1 decha 1DDeeppaarrtmtmeennttooffMMaateterriaialslsaannddMMeetatallulurrggicicaallEEnngginineeerriningg, ,FFaaccuultlytyooffEEnngginineeerriningg, , Rajamangala University of Technology Thanyaburi, Pathum Thani 12110, Thailand * Corresponding email: [email protected] Abstract Biodegradable composite materials were successfully prepared by using thermoplastic starch (TPS) from potato starch, bagasse fiber and corn cob powder. Moreover, water and glycerol were varied and used as the plasticizers. In order to improve the mechanical properties of the TPS, the corn cob powder and bagasse fiber contents were used at 2 and 5 g, respectively. However, the high water absorption of TPS exhibited the limitation for the application of biodegradable composite materials. This problem could be solved by adding modified palm oil which used as hydrophobic phase and varied from 0.5 to 2 phr. Two roll mill and compression molding machine were used to compound and prepare the sample, respectively. Density, mechanical properties, and water absorption were determined. The results showed that the incorporation of modified palm oil into the TPS matrix caused considerable improvement to decrease the water absorption. By adding modified palm oil at 2 phr, the composite showed the minimum water absorption. However, density, tensile strength, impact strength and hardness of TPS composites were clearly decreased as modified palm oil content increased. Keywords: Composite materials, Thermoplastic starch, Bagasse fiber, Modified palm oil 831

TThhee1111ththRRajammaannggaalalaUUninvievresritsyitoyf oTfecThencohlongoyloIgnyteIrnatetironnaatliConoanlfeCreonncfeerence ““RRMMUUTT 1D1rtiihvviinRnggatjotaowwmaaradrndIngInanolnavoaUvtiaontnii,ovEnec,roEsnicotoymnyooSfamunTysdteSaaGciunnrhsdeatnebaGnolienrlToDeaeegbcenhyvleenTIloDoenlpcoetmhgveyenerlnnfoootla”protmgiyoennfota”rl Conference The “RMUT Driving toward Innovation, Economy and Green Technology for Sustainable Development” Preparation and Characterization of Typha Natural Fiber Reinforced Poly(lactic acid) Biocomposite Rattikarn Khankrua1*, Bawornkit Nekhamanurak1 and Supakij Suttiruengwong2 1 Department of Materials Engineering, Faculty of Engineering, Rajamangala University of Technology Rattanakosin, Salaya, Phutthamonthon, Nakhon Pathom 73170, Thailand 2 Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand * Corresponding email: [email protected] Abstract This research aimed to study the mechanical properties, flow properties, morphology and sound absorption coefficient of poly(lactic acid) reinforced with cellulose fiber from Typha. The influences of fiber content between 10-40 phr on the biocomposites properties were investigated as well as the effect of compatibilizer. The biocomposites were prepared through twin screw extrusion process. The results showed that the impurities in fiber were removed after treatment by alkaline solution which confirmed by FTIR analysis. The morphology of the compatibilizer added composites exhibited the good adhesion between fiber and PLA matrix, however, agglomeration of fiber also could be observed. Flow properties showed that the MFI of composite decreased with fiber content increase. For the mechanical properties, the tensile strength, Young’s modulus and impact strength of the biocomposites with compatibilizer addition were higher than those of the composites without compatibilizer. In addition, Young’s modulus increased with fiber content whereas the elongation at break decreased. However, when fiber content increased to 40 phr, the elongation at break was closed to that of neat PLA. Sound Absorption test showed that the composites materials could not significantly absorb sound, but it could act as sound barrier materials instead due to its good reflection behavior. Keywords: Poly(lactic acid), Typha, Natural fiber, Composite, Biopolymer 842