【作者】 贺江平； 陈星运； 舒远杰；

【Author】 He Jiangping~1,Chen Xingyun~2,Shu Yuanjie~1 (1 Institute of Chemical Materials,CAEP,Mianyang,621900,China) (2 Institute of Material Science and Engineer,Southwest Science and Technology University,Mianyang,621010,China)

【机构】 中国工程物理研究院化工材料研究所； 西南科技大学材料科学与工程学院；

【摘要】 <正>石墨/聚合物复合材料由于具有优于金属材料的耐腐蚀性能和优于石墨的加工成型性能,在质子交换膜燃料电池双极板材料的诸多选择中被认为是最有前途的选项。然而,这类应用对复合材料的导电性能提出了很高的要求,要求材料的导电率大于100 S/cm(即电阻率小于0.01Ω.cm)。因此,研究开发具有高导电率(电阻率的倒数)的石墨填充复合材料对于燃料更多还原

【Abstract】 The graphite nanosheets /epoxy composites were prepared by solution mixing and using DDS as curing agent.On this basis,the effect of content of graphite nanosheets on electrical resistance and mechanical properties was studied.Results show that graphite nanosheets /epoxy have percolation threshold less than 1(wt)%,as well as resistance of the nanocomposites with 60(wt)% graphite nanosheets is 0.0085Ω·cm.At the same time,resistance of the composites consisting of 80(wt)%graphite micropowder and epoxy is 0.03Ω·cm.This case indicate that graphite nanosheets reduces the resistance of polymer more efficiently than the graphite micropowder.Although the mechanical properties of nanocomposites less than that of microcomposites.更多还原