硅橡胶/石墨烯复合材料的制备及性能研究

Study of the preparation and properties of silicone rubber/graphene composites

目的制备一种具有导电性能的硅橡胶/石墨烯复合材料。方法以高温热解石墨烯为填料,采用超声辅助溶液混合法将石墨烯分散到硅橡胶中,进而采用高温硫化的方式制备硅橡胶/石墨烯复合材料,并对其导电性能和力学性能进行表征。结果硅橡胶/石墨烯复合材料的渗流阈值为1.9 wt%,且其具有正向压阻效应。石墨烯的引入可显著提高硅橡胶的导电性和力学性能。结论目标材料有望用于防静电橡胶和电磁屏蔽制品,在医疗设备领域具有广泛的应用前景。

Objective：To prepare a kind of silicone rubber/ graphene composite with electrical conductivity. Methods：Graphene were produced via thermal expansion of graphite oxide. Graphene were dispersed in methylvinyl silicone rubber by ultrasonic assisted solution method. Silicone rubber/ graphene composites were successfully fabricated after curing. The electrical and mechanical properties of the composites were studied. Results：The silicone rubber/ graphene composites exhibited a percolation threshold as low as 1. 9 wt% ,and a remarkable positive piezoresistivity behavior. Both electrical conductivity and mechanical properties of the silicone rubber were significantly improved with the addition of graphene. Conclusion：The objective material is expected to be used for antistatic rubber and electromagnetic shielding products,and has broad application prospects in the field of medical equipment.