聚苯胺-碳纤维导电纸的制备

Preparation of polyaniline-carbon fiber conductive paper

摘要:

：区别于常用的液相原位聚合法，采用改良的分步液相原位聚合法使得聚苯胺均匀生长在碳纤维纸基体上。探究了碳纤维与芳纶浆粕配比、引发剂与苯胺用量，以及浸渍时间和反应时间对聚苯胺-碳纤维导电纸的导电性能的影响。采用扫描电子显微镜（SEM）观察导电纸的微观形貌，利用傅里叶变换红外光谱（FT-IR）与电镜能谱图分析（EDS）分别表征其表面结构与元素变化。结果表明：当碳纤维与芳纶浆粕的配比为2:8；引发剂用量为0.375 mol/l；苯胺与盐酸摩尔比为2:1；反应时间为12 h，浸渍时间为1 min时效果最佳，相对于碳纤维原纸（CP），分步液相原位聚合法制备的导电纸（PANI-CP）体积电阻率为0.184 Ω?cm，导电性能提高71.4%，抗张指数为22.993 N?m/g，物理强度提高14.1%；且相对于液相原位聚合法制备的导电纸（L-PANI-CP），导电性能提高46.2%，总色差值DE下降66.0%。

Abstract:

Different from the commonly liquid phase in-situ polymerization method, the modified stepwise liquid phase in-situ polymerization method is used to make polyaniline grow uniformly on the carbon fiber paper substrate. The effects of the ratio of carbon fiber to aramid pulp, the amount of initiator and aniline, and the dipping time and reaction time on the conductive properties of polyaniline-carbon fiber conductive paper were investigated. Scanning electron microscope (SEM) was used to observe the microscopic morphology of conductive paper, and Fourier transform infrared spectroscopy (FT-IR) and electron microscopy energy spectrum analysis (EDS) were used to characterize their surface structure and element changes. The results show that when the ratio of carbon fiber to aramid pulp is 2:8; the amount of initiator is 0.375 mol/l; the molar ratio of aniline to hydrochloric acid is 2:1; the reaction time is 12 h and the dipping time is 1 min. relative to the carbon fiber base paper (CP), the volume resistivity of the conductive paper (PANI-CP) prepared by the stepwise liquid phase in-situ polymerization method is 0.184 Ω?cm, the conductivity is improved by 71.4%, and the tensile index is 22.993 N? m/g, physical strength increased by 14.1%; and relative to conductive paper (L-PANI-CP) prepared by liquid phase in-situ polymerization method, the electrical conductivity increased by 46.2%, and the total color difference DE decreased by 66.0%