支座用石墨烯/导电炭黑橡胶材料的制备与性能

Preparation and performance of graphene/conductive carbon black compounded rubber material for bearings

以石墨烯和特制导电炭黑为功能填料,溴化丁基橡胶(BIIR)为基胶,制备出阻尼性能较好的导电橡胶材料.针对石墨烯/导电炭黑10种不同的组分,开展了力学性能、动态力学性能与电阻率测试实验,探究了加入石墨烯与导电炭黑对BIIR性能的影响规律.结果表明,导电炭黑对BIIR材料有补强效果,石墨烯/导电炭黑协同并用可以有效提高BIIR的阻尼性能与导电性能.在每100 g总胶料中添加40 g导电炭黑时,BIIR/导电炭黑复合材料的拉伸强度与撕裂强度分别达到20.28 MPa和45.66 kN/m.当导电炭黑和石墨烯并用组分的质量比为40∶10时,BIIR/导电炭黑/石墨烯复合橡胶材料最大损耗因子提升至0.5,电阻率为3 646Ω·cm.复合材料的导电炭黑和石墨烯组分最优质量比为40∶5.制备得到的新型复合材料具有较好的力学性能、阻尼性能与导电性能,可为隔震支座用高阻尼导电橡胶的制备提供参考.

The conductive rubber materials with better damping performance were prepared by using graphene/conductive carbon black(CCB)as functional fillers and brominated butyl rubber(BIIR)as base rubber.The mechanical properties,dynamic mechanical properties(DMA)and resistivity test experiments of 10 formulations with different graphene/CCB components were performed to investigate the influence law of adding graphene and CCB on the performance of BIIR.The results show that CCB has a reinforcing effect on the BIIR material,and the synergistic use of graphene/CCB can effectively improve the damping and conductive properties of BIIR.The tensile and tear strength of BIIR/CCB composites reach 20.28 MPa and 45.66 kN/m when 40 g CCB is added to every 100 g total rubber.The maximum loss tangent of the BIIR/CCB/graphene composite rubber material is increased to 0.5 with a resistivity of 3646Ω·cm when the mass ratio of CCB to grapheme composition is 40∶10.The optimal ratio of CCB to graphene components for the composites is 40∶5.The prepared new composite material has good mechanical properties,damping properties and electrical conductivity.The results can provide a reference for the preparation of high damping conductive rubber bearings.