石墨烯/室温硫化硅橡胶复合材料的制备及性能  

Preparation and properties of graphene/room temperature vulcanized silicone rubber composites

作　　者：董建[1] 张倩[1] 陈广新[1] 李克鹏[1] 

机构地区：[1]泰山医学院化工学院,山东泰安271016

出　　处：《合成橡胶工业》2013年第2期111-114,共4页China Synthetic Rubber Industry

基　　金：山东省优秀中青年科学家科研奖励基金资助项目(BS 2010 CL 045)

摘　　要：采用水合肼对氧化石墨进行还原获得石墨烯,通过高速剪切分散法将石墨烯分散到α,ω-羟基聚二甲基硅氧烷中,固化后得到石墨烯/室温硫化(RTV)硅橡胶复合材料。对石墨烯和复合材料的微观形貌进行了表征,并考察了复合材料的性能。结果表明,所制备石墨烯的厚度为1～3 nm,为具有较少层数的石墨烯片层结构;复合材料断面呈微相分离结构,但其差示扫描量热曲线只有1个玻璃化转变温度(Tg)。随着石墨烯用量的增加,复合材料的Tg升高,结晶熔点降低。石墨烯对RTV硅橡胶有增强作用,当石墨烯的质量分数为0.5%时,复合材料的拉伸强度达到0.35 MPa,较纯RTV硅橡胶的拉伸强度提高了67%。Graphene was prepared by reducing graphite oxide with hydrazine hydrate as reductant.Graphene was dispersed in α,ω-dihydroxy-polydimethylsiloxane by high-speed shearing dispersion method.The graphene/room temperature vulcanized（RTV） silicone rubber composites were obtained after curing.The micro morphology of graphene and the composites were characterized and the properties of the composites were analyzed.The results showed that the as-prepared graphene nanosheet had fewer layers and its thickness was 1-3 nm.The composites had a microphase separation structure,but its differential scanning calorimetry curve exhibited only one glass transition temperature（Tg） and one crystalline melting point（Tm）.With the increase of the content of graphene,Tg increased and Tm decreased.Graphene had reinforcement effect on RTV silicone rubber.The tensile strength reached 0.35 MPa when the mass fraction of graphene was 0.5%,increasing by 67% compared with that of pure RTV silicone rubber.

关 键 词：石墨烯 室温硫化硅橡胶 复合材料 微观形貌 力学性能 玻璃化转变温度 

分 类 号：TQ333.93[化学工程—橡胶工业]