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.\r\nThe morphology, chemical composition, mechanical, physical, and thermal properties of natural rubber composites were characterized by SEM, FTIR, tensile, tear, hardness, compression, and TGA tests. \r\nThis 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. \r\nMore 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. \r\nConductive 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.\r\nThis 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.