Functionalized graphene oxide （FGO） was prepared by treating graphene oxide with y-aminopropyl triethoxysilane （KH-550） before the mixture was dispersed into a, ω-dihydroxy polydimethylsiloxane to get room temper...Functionalized graphene oxide （FGO） was prepared by treating graphene oxide with y-aminopropyl triethoxysilane （KH-550） before the mixture was dispersed into a, ω-dihydroxy polydimethylsiloxane to get room temperature vulcanized （RTV） silicone rubber composites by solution casting. The cured composites were then reduced with hydrazine hydrate to obtain functionalized graphene （FG）/RTV silicone rubber composites. The structures of FGO and the resultant composites were characterized by atomic force microscopy, FT-IR spectra and X-ray diffraction. KH-550 was found to be grafted onto graphene sheets, leading to an increased interlayer spacing. Significant improvements in thermal and mechanical properties were obtained. Both the FGO/RTV silicone rubber composite contain 1.0 wt% of FGO, and its reduced product showed an increase of one-step weight loss temperature with 61 ℃ and 133 ℃ higher than that of pure silicone rubber. Tensile strength and elongation at break of FG/RTV silicone rubber composite （with 0.5 wt% FGO content） increased by 175% and 67%, respectively, compared with those of pure silicone rubber.展开更多
基金Funded by the National Natural Science Foundation of China (No.51072059)
文摘Functionalized graphene oxide （FGO） was prepared by treating graphene oxide with y-aminopropyl triethoxysilane （KH-550） before the mixture was dispersed into a, ω-dihydroxy polydimethylsiloxane to get room temperature vulcanized （RTV） silicone rubber composites by solution casting. The cured composites were then reduced with hydrazine hydrate to obtain functionalized graphene （FG）/RTV silicone rubber composites. The structures of FGO and the resultant composites were characterized by atomic force microscopy, FT-IR spectra and X-ray diffraction. KH-550 was found to be grafted onto graphene sheets, leading to an increased interlayer spacing. Significant improvements in thermal and mechanical properties were obtained. Both the FGO/RTV silicone rubber composite contain 1.0 wt% of FGO, and its reduced product showed an increase of one-step weight loss temperature with 61 ℃ and 133 ℃ higher than that of pure silicone rubber. Tensile strength and elongation at break of FG/RTV silicone rubber composite （with 0.5 wt% FGO content） increased by 175% and 67%, respectively, compared with those of pure silicone rubber.
