聚苯胺-碳纤维导电纸的制备

Preparation of polyaniline-carbon fiber conductive paper

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。考察了碳纤维质量分数、引发剂过硫酸铵(APS)与苯胺用量,以及浸渍时间和反应时间对聚苯胺-碳纤维导电纸导电性能的影响。采用SEM观察导电纸的微观形貌,利用FTIR与EDS分别表征其表面结构与元素变化。结果表明,当碳纤维质量分数为20%,引发剂APS浓度为0.375 mol/L,n(苯胺)∶n(盐酸,1 mol/L)=2∶1,反应时间为12 h,浸渍时间为1 min时,制备的导电纸(PANI-CP)的导电性能最佳。相对于碳纤维原纸(CP),制备的PANI-CP电导率为5.435 S/cm,导电性能提高250.0%,抗张指数为27.665N·m/g,抗张指数提高37.3%。相对于液相原位聚合法制备的导电纸(L-PANI-CP),PANI-CP导电性能提高85.9%,总色差值(DE)下降66.0%。

The modified stepwise liquid phase in-situ polymerization method was used to make polyaniline grow uniformly on the carbon fiber paper substrate.The effects of carbon fiber mass fraction,initiator ammonium persulfate(APS)dosage,aniline dosage,dipping time and reaction time on the conductivity of polyaniline-carbon fiber conductive paper were investigated.The morphology,surface structure and element changes of conductive paper was characterized by SEM,FTIR and EDS.The results showed that under the conditions of mass fraction of carbon fiber of 20%,APS concentration of 0.375 mol/L,n(aniline)∶n(hydrochloric acid,1 mol/L)=2∶1,reaction time of 12 h and immersion time of 1 min,the prepared conductive paper(PANI-CP)had the best conductivity.Compared with those of carbon fiber base paper(CP),the conductivity of PANI-CP was 5.435 S/cm,which was an improvement of 250.0%,the tensile index was 27.665 N·m/g,and the physical strength increased by 37.3%.Compared with the conductive paper(L-PANI-CP)prepared by liquid phase in-situ polymerization method,the conductivity of PANI-CP was increased by 85.9%and the total color difference DE decreased by 66.0%.