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Title:: Modification of Graphene Oxide and Its application in Silicone Rubber

Author(s):: WANG Hualan 1; *; LIU Risheng 1; HU Yingqian 1; Wu Jirong1; Zhang Guodong1; ZHOU Xufeng 2; LIU Zhaoping 2; （1.? Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education，Hangzhou Normal University, Hangzhou 311121, China）

（2.? Key Laboratory of Graphene Technologies and Applications of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Zhejiang 315201, China）

Keywords:: graphene oxide; silicone; silicone rubber; adhesive; mechanical properties

Abstract:: The rapid development of science and technology has brought new opportunities and challenges for new silicone materials. In order to improve the mechanical strength and adhesive properties of the present silicone adhesive and to meet the new requirements of evolving industrial applications, a new functional graphene oxide/SiO2 (GOS) filler and the corresponding GOS/room temperature vulcanized silicone rubber (RTV SR) composites were prepared. The effects of GOS on the mechanical properties of silicone rubber composites were investigated, and the adhesion of silicone rubber composites to the aluminum substrate was also investigated. Firstly, tetraethyl orthosilicate and GO were used as raw materials, and the in-situ synthesis method was used to introduce the nano-SiO2 onto the GO layer to prepare GOS. Then GOS was integrated into the silicone rubber matrix under solvent-free conditions, and the silicone rubber composite with good mechanical properties and adhesion was prepared by vulcanization. The results show that SiO2 can effectively modify GO at room temperature, and the modified GO is more easily dispersed in the silicone rubber. The mechanical strength and adhesive properties of the obtained silicone rubber composite thus increase significantly.