采用静电纺丝技术制备了多壁碳纳米管/聚氨酯(MWNTs/PU)复合超细纤维,并收集成无纺布薄膜,采用热失重分析仪(TGA)和动态力学分析仪(DMA)分析了纤维的热稳定性.利用数字高阻计(PC68)和Loresta GP电阻计测量了纤维薄膜的直流电导率随MWNTs含量的变化关系.为了研究该多孔薄膜的动态电学性能,同时采用Agilent 4294A阻抗分析仪测试了纤维薄膜的电导率在40 Hz～110 MHz频率范围内的变化关系,并与浇注试样的结果进行比较.结果表明,随MWNTs在PU纤维中含量的增加,复合纤维的热稳定性提高.当MWNTs质量分数达40%时,PU的电导率提高近1010倍.
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