碳纳米管石墨烯协同改性环氧树脂复合材料的机敏性研究  

SENSING ABILITY OF GRAPHENE AND CARBON NANOTUBES MODIFIED EPOXY RESIN

作　　者：田长进 卢青 徐茜茜 孙仁娟[1] 葛智[1] TIAN Chang-jin;LU Qing;XU Xi-xi;SUN Ren-juan(School of Civil Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]山东大学土建与水利学院,济南250061

出　　处：《玻璃钢／复合材料》2018年第10期62-69,共8页Fiber Reinforced Plastics/Composites

基　　金：教学部留学回国人员科研启动基金(20131792)。

摘　　要：进行了碳纳米管石墨烯协同改性环氧树脂复合材料的机敏性能研究。试验固定碳纳米管质量分数为0.3%,通过改变C级和M级两种石墨烯掺量,得到不同石墨烯掺量下复合材料的导电特性和机敏性。结果显示:C级石墨烯复合材料的阈值区间为11%~15%;C级石墨烯掺量为11%时,试件压敏性最优,噪声最小;掺量为15%时拉敏性最佳,在应力为1.25 MPa时,电阻变化率最大为0.89%。M级石墨烯碳纳米管复合材料的阈值区间为3%~6%;M级石墨烯掺量为3%时,压敏试件的电阻变化率最大为3.21%,但滞弹现象严重;掺量5%时拉敏性最好,噪音最小。在相同分散工艺下,M级石墨烯导电性能优于C级石墨烯。This study analyzed the sensing ability of carbon nanotubes and grapheme modified epoxy resin.The mass fraction of carbon nanotubes(CNTs)was fixed at 0.3%.The resistivity and sensitivity of the composites with different graphene content were obtained by changing the content of C and M graphene.The results show that the threshold range of C-graphene composites is 11%~15%.When the content of C-graphene is 11%,the sample has the best pressure-sensitivity and the least noise.When the dosage is 15%,the best tensile property is obtained.And,when the stress is 1.25 MPa,the maximum rate of resistance change is 0.89%.The threshold range for M-grade graphene nanotubes composites is 3%~6%.When the content of M graphene is 3%,the maximum rate of resistance change of pressure-sensitive specimen is 3.21%,but the phenomenon of hysteresis is serious.When the content of M-graphene is 5%,the tensile sensitivity is the best and the noise is the least.Under the same dispersion process,M-grade graphene is superior to C grade graphene.

关 键 词：复合材料 碳纳米管 石墨烯 阈值曲线 机敏性 

分 类 号：TB332[一般工业技术—材料科学与工程]