Properties of Functionalized Graphene/Room Temperature Vulcanized Silicone Rubber Composites Prepared by an In-situ Reduction Method  

作　　者：马文石 LI Ji DENG Bangjun LIN Xiaodan ZHAO Xusheng 

机构地区：[1]College of Materials Science and Engineering, South China University of Technology [2]Guangzhou Institute of Chemistry, Chinese Academy of Sciences

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第1期127-131,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China (No.51072059)

摘　　要：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.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.

关 键 词：COMPOSITES RUBBER mechanical properties 

分 类 号：TB33[一般工业技术—材料科学与工程]