Tensile Strength Enhancement of An Epoxy System by SiO2 Addition
Abstract
In this study, the tensile strength enhancement of an epoxy system was aimed by the addition of SiO2 nanoparticles. Two main features of the nanoparticle performance on the tensile strength increment were particle size and particle amount. Hence, two particle sizes with various amounts were utilized for SiO2 application in order to improve the tensile strength of the epoxy system. 80 nm particle sized SiO2 provided 66.6% increment when the utilized SiO2 amount was 0.5% by weight. Moreover, when particle size of SiO2 was decreased to 5-20nm, the highest improvement was measured as 88.2%. Also, it was observed that there was a threshold in the utilization amount. Before this point the enhancement improved with SiO2 amount. However after this point, the tensile strength started to decrease with increasing SiO2 addition. This threshold was observed as 0.5% for both 5-20 nm and 80 nm particle sizes.
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