Radiation Synthesis Of Polysilane-Modified Graphene Oxide For Improving Thermal Conductivity And Mechanical Properties Of Silicone Rubber

Functionalized graphene oxide (named GO-Si) was synthesized with graphene oxide and triethoxyvinylsilane (TEVS) using tetrahydrofuran solution by -ray irradiation. TEVS was successfully covered onto GO sheets, and the polysilane content on GO-Si was increased upon increasing the absorbed dose. The structures of GO-Si were verified by atomic force microscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The resultant GO-Si was dispersed into ,-dihydroxypolydimethylsiloxane to prepare room temperature vulcanized silicone rubber composites (named SR/GO-Si) by solution casting. The dispersion of GO-Si was more uniform than that of GO. Compared to that of pure SR, the thermal conductivity of SR/GO-Si-1.95 composites was increased 1.5-fold, and its tensile strength and elongation at break increased 78.6 and 71.4%, respectively. It was expected that SR/GO-Si would have potential application as the thermal interface material. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47776.