I studied Geotechnical Engineering in the department of Geo-resources and Geotechnical Engineering at Institute of Technology of Cambodia. Then, I continued my master degree in Rubber Engineering. During my master thesis, I studied the effect of nanosilica, maerogel, and hybrid nanosilica with mineral fillers (CaCO3, china clay, and mica) in Standard Cambodian Natural Rubber (SCNR) nanocomposites for green tires application.rnThe morphology, chemical composition, mechanical, physical, and thermal properties of natural rubber composites were characterized by SEM, FTIR, tensile, tear, hardness, compression, and TGA tests. rnThis work allowed me to learn how to prepare natural rubber composites and characterize their properties. This project also offered me fundamental knowledge on the characterization needed for the rubber industry, especially for green tires application. From this study, I have published two articles in advanced material research journal. rnMore recently, during my PhD research, I have worked on nanocelluloses, which were extracted from bleached pine pulp and bacterial acetobactor xylinum. The main objective of this work was to produce flexible and lightweight conductive nanopaper using nanocelluloses as matrix and conductive materials (polypyrrole PPy), poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS), and multi-walled carbon nanotubes (MWCNT)) as fillers. rnConductive nanopaper comprising MWCNT and PEDOT:PSS were prepared by following blending techniques, and all nanocomposites containing polypyrrole were performed by coating the conductive polymer on the nanocelluloses surface, via in situ chemical polymerization in the presence of iron (III) chloride as oxidant agent. The materials properties were characterized by tensile test and dynamic mechanical analysis, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), thermogravimetry analysis (TGA), multimeter, and cyclic voltammetry.rnThis work presents a trend for the application of cellulose nanofibers in the field of green and flexible electronics, biosensors, and energy storage devices such as batteries or supercapacitor.
PhD in Polymer Science and Engineering
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List of publications\r\n1. Lay, M., González, I., Tarrés J.A., Pellicer, N., Bun, K.N., Vilaseca, F., (2017). High electrical and electrochemical properties in bacterial cellulose / polypyrrole membranes. European Polymer Journal, 91, 1–9. http://dx.doi.org/10.1016/j.eurpolymj.2017.03.021. \r\n2. Lay, M., Pèlach, M. À., Pellicer, N., Tarrés, J. A., , Bun, K. N., & Vilaseca, F. (2017). Smart nanopaper based on cellulose nanofibers with hybrid PEDOT:PSS/Polypyrrole for energy storage devices. Carbohydrate Polymer, 165, 86–95. http://dx.doi.org/doi:10.1016/j.carbpol.2017.02.043. \r\n3. Lay, M., Méndez, J. A., Pèlach, M. À., Bun, K. N., & Vilaseca, F. (2016). Combined effect of carbon nanotubes and polypyrrole on the electrical properties of cellulose-nanopaper. Cellulose, 23(6), 3925–3937. http://doi.org/10.1007/s10570-016-1060-5.\r\n4. Lay, M., Méndez, J. A., Delgado-Aguilar, M., bun, K. N., & Vilaseca, F. (2016). Strong and electrically conductive nanopaper from cellulose nanofibers and polypyrrole. Carbohydrate Polymer, 152, 361–369. http://doi.org/10.1016/j.carbpol.2016.06.102. \r\n5. Lay, M., Rashid, A. A., Othman, N., Tezuka, Y., & Pen, C. (2014). Comparison of mechanical properties and curing characteristics of natural rubber composites with different coupling agents. Advanced Materials, 858, 24-31. http://doi:10.4028/www.scientific.net/AMR.858.24. \r\n6. Lay, M., Rashid, A. A., Othman, N., Tezuka, Y., Pen, C. (2013). Effect of Nanosilica Fillers on the Cure Characteristics and Mechanical Properties of Natural Rubber Composites. Advanced Materials, 626, 818-822. htpp://doi:10.4028/www.scientific.net/AMR.626.818.
The development of novel multi-functional nanocomposites has gained tremendous research interest, especially on the use of low-cost, renewable, biodegradable, and environmentally friendly biomaterials. Coming from renewable and sustainable raw materials, nanocelluloses are rapidly emerging as one of the most promising future materials for advanced applications. The preparation of nanocomposites for packing application by using renewable raw material and biodegradable bioplastic is one of the innovative sectors that sustainable society can be realized in the future. \r\nOne very interesting research work would be the combination of polymer such as polypropylene (PP), polyethylene (PE), Poly lactic acid (PLA) or natural starch with cellulose nanofibers to apply for food packaging. Cellulose nanofibers (CNFs) could be used as natural additive or barrier coating on polymer or biodegradable bioplastic due to their high mechanical properties and biological properties. Moreover, the high surface area of CNFs and the plentiful reactive hydroxyl groups on the CNF surface allow strong interactions with active materials and the possibility of forming uniform coatings as well as surface modification. \r\nIn my opinion, these new proposed nanocomposites could significantly facilitate the development of compact, low cost and environmentally friendly nanocomposites intended to barrier coating of paper and paperboard.
|Full name:||:||Makara Lay|
|Address||:||A28Eo, Depo market, Teuk Laak I, Toul kork, Phnom Penh, Cambodia|
|Registered||:||Tuesday 25 July 2017|