Synthesis of Fumed Silica Treated with Organosilane and Its Effect on Epoxy Resin

Abstract

In this work, fumed silica treated with two kinds of orgnosilanes, γ-Aminpropyltriethoxysilane(KH550) and 3-Trimethoxysilylpropyldimethyloctadecyl ammonium Chloride(AEM5700), were synthesized. Then a series of silica/epoxy composites were prepared by casting molding. The effects of silica dispersion and loading on the mechanical properties were discussed. Results showed that compared with AEM 5700 modified silica/epoxy, tensile properties of KH550 modified silica/epoxy composites was significantly increased. Both composites reached their maximum mechanical properties at 3% silica loading. SEM indicates compared with neat silica/epoxy composites, both orgnosilanes modified silica/epoxy dispersed more evenly in EP matrix.

Keywords:

• Epoxy
• Fumed silica
• Mechanical properties
• Organosilane
• SEM

ACKNOWLEDGMENTS

The authors would like to acknowledge the financial support of National Natural Science Foundation of China (Grant No. 51003084) and SRF for ROCS, SEM.