Radiation synthesis of polysilane‐modified graphene oxide for improving thermal conductivity and mechanical properties of silicone rubber

Abstract

ABSTRACTFunctionalized graphene oxide (named GO‐Si) was synthesized with graphene oxide and triethoxyvinylsilane (TEVS) using tetrahydrofuran solution by γ‐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 α,ω‐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. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47776.