采用机械共混法制备了石墨烯(GNS)/室温硫化硅橡胶(RTV)复合材料.用扫描电镜(SEM)、透射电镜(TEM)、红外光谱(FT-IR)、拉曼光谱(Raman)和X射线衍射(XRD)对GNS的微观结构以及GNS在RTV硅橡胶基体中的分布情况进行了表征和分析,同时研究了GNS/RTV硅橡胶复合材料的力学性能.结果表明,石墨烯在基体硅橡胶中的分布较均匀,极少出现团聚现象;随着填料石墨烯含量的增加,复合材料的拉伸模量逐渐增大,拉伸强度和断裂伸长率均出现极大值后渐渐减少;当石墨烯的质量分数为0.925％时,复合材料的拉伸强度和断裂伸长率均达最大值,分别为0.8387MPa和195.78％,比纯RTV硅橡胶提高了159.86％和55.32％;此时拉伸模量比纯RTV硅橡胶提高了157.44％.
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