高导电聚苯胺/多壁碳纳米管复合材料的制备与电性能研究

采用混酸处理法对多壁碳纳米管（MWCNTs）进行表面处理， 通过原位聚合法，以过硫酸铵为氧化剂，制备高导电聚苯胺(PANI)/MWCNTs复合材料。采用透射电子显微镜、傅里叶变换红外光谱仪 、紫外可见分光光度计以及X射线衍射仪对MWCNTs和复合材料进行表面观察、结构测定与性能表征；使用两探针法测量复合材料的电性能，并通过平均电场理论和逾渗阈理论进行理论分析。结果表明，MWCNTs的直径约为60~100 nm，长度约为几十微米，酸化后MWCNTs表面引入大量—OH和—COOH；随着MWCNTs含量增加，导电PAM/MWCNTs复合材料的电导率增加，渗滤阈值的理论值为2.36 %。

Study on Preparation of Polyaniline/Multi walled Carbon Nanotube Composites and Its Electrical Properties

Multi walled carbon nanotubes (MWCNTs) were surface treated with an acid mixed, in which aniline was in situ polymerized forming conductive compositeswith ammonium persulfate as an oxidant. The morphology and performance of the composites were characterized using transmission electron microscope, Fourier transform infrared spectroscopy, UV visible spectrophotometer, and X ray diffraction. The electrical properties of the composites were measured using two probe method and analyzed with mean field theory and a percolation threshold value of 2.36 % was observed. The diameter of the MWCNTs was 60~100 nm, and the length was about a few tens of micron. On the surface of MWCNTs a large number of —OH and —COOH groups were formed.