Abstract:

Silicon elastomer nanocomposite samples have been prepared using different concentrations (1-7 wt%) of ZnO nanoparticle via mechanical mixing and hot press molding. The surface morphology of prepare Silicon elastomer nanocomposite has been studied by scanning electron microscope (SEM) which reveals the smooth dispersion of Zinc Oxide  nanoparticles inside matrix and at higher concentration (7 wt%) agglomerates are formed. The mechanical property of Silicon elastomer nanocomposite show the increase in tensile strength, modulus and decrease in elongation at break with ZnO concentrations, this can be recognized towards excellent distribution and reinforcing action of the nanoparticle in the polymer matrix. At high concentration (7 wt%) the rate of increase of mechanical properties is small due to agglomeration of nanoparticles. The incorporation of ZnO nanoparticles resulted in a significant improvement in the mechanical properties of SR. Tensile strength, Young’s modulus exhibited continuous enhancement with increasing filler concentration, primarily due to strong interfacial interactions, restricted polymer chain mobility, and improved stress-transfer mechanisms. An optimal improvement was observed in the 5–7 wt% range, where the formation of an effective reinforcement network contributed to maximum mechanical strength without inducing agglomeration-related defects. The study demonstrates that ZnO nanoparticles act as efficient reinforcing agents for silicone rubber, offering a promising route for developing high-performance nanocomposites suitable for, electrical insulation, and flexible device applications.