利用碳纳米管（CNTs）与十六烷基三甲基溴化铵（CTAB）的吸附作用，制得具有湿敏特性的CNTs，并通过红外光谱分析和热失重分析确定其组成；将其作为抗静电剂加入到聚氯乙烯（PVC）中，通过模拟潮湿环境研究其湿敏特性对PVC／CNTs复合材料体积电导率的影响规律。结果表明，CNTs的有机化改性可降低其在复合材料中的逾渗阈值；当CNTs添加量为4％（质量分数，下同）时，经过潮湿处理的PVC复合材料的电导率可升高4个数量级。%In the study, humidity-sensitive carbon nanotubes (CNTs ) were prepared through adsorption between CNTs and cetyltrimethyl ammonium bromide (CTAB ),and their chemical compositions were characterized by Fourier-transform infrared spectroscopy and thermogravimetric analysis.Such humidity-sensitive CNTs were introduced into poly (vinyl chloride)(PVC)as a conductive additive.The effect of humidity-sensitive CNTs on the volume conductivity of the composites was investigated under a simulated moisture environment.The results indicated that the PVC/CNTs composites achieved a percolation threshold at a low CNTs loading of 4 wt.%due to the surface-modification of CNTs,and the electronic conductivity of the composites increased by four orders of magnitude after the absorbing moisture.
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