CNTs表面包覆PPy对PVC复合材料电导率的影响

发布时间：2018-05-12 02:44

本文选题：聚氯乙烯 + 碳纳米管　；参考：《工程塑料应用》2017年03期

【摘要】：为促进碳纳米管(CNTs)更为有效地应用于聚合物抗静电复合材料,采用原位聚合在CNTs表面生成聚吡咯(PPy)包覆层得到CNT-PPy,其组成通过傅立叶变换红外光谱分析和热重分析确认。CNT-PPy作为导电剂添加到聚氯乙烯(PVC)中制备PVC/CNT-PPy复合材料,对比分析PVC/CNT-PPy复合材料电导率的变化规律可得:PPy修饰CNTs可降低PVC/CNT-PPy复合材料中CNTs的逾渗阈值;当PPy包覆层在CNT-PPy中质量分数约为51.1%,CNT-PPy在复合材料中的质量分数为3%时,制得PVC复合材料的电导率可达到10 7 S/cm量级。由此可知,CNTs表面可控的PPy修饰量对PVC/CNTs复合材料抗静电性能起到显著的提升作用,为CNTs作为高性能导电剂应用提供更多的空间。
[Abstract]:In order to promote the more effective application of CNTsin polymer antistatic composites, In situ polymerization was used to form polypyrrole pyrrolidene (PPy) coating layer on the surface of CNTs. Its composition was confirmed by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). CNT-PPy was added as conductive agent to PVC to prepare PVC/CNT-PPy composites. By comparing and analyzing the electrical conductivity of PVC/CNT-PPy composites, it can be concluded that the percolation threshold of CNTs in PVC/CNT-PPy composites can be reduced by modifying CNTs with the ratio of 1: PPy, and when the mass fraction of PPy coating in CNT-PPy is about 51.1%, the mass fraction of CNT-PPy in PVC/CNT-PPy composites is 3%. The conductivity of PVC composites can reach 10 ~ 7 S/cm. It can be seen that the controllable amount of PPy modifier on the surface of PVC/CNTs can significantly improve the antistatic properties of PVC/CNTs composites and provide more space for the application of CNTs as a high performance conductive agent.
【作者单位】：贵州师范大学材料与建筑工程学院;
【基金】：贵州省科技厅联合基金项目(黔科合LH字[2014]7042号) 贵州省科技创新人才团队建设(黔科合人才团队[2014]4006号)
【分类号】：TQ325.3;TB33

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