聚苯胺表面修饰芳纶浆粕及其纸基材料的导电性能

通过在芳纶浆粕(AP)表面修饰聚苯胺(PANI)制备了聚苯胺-芳纶浆粕(PANI-AP), 然后与碳纤维(CF)共混, 采用湿法抄纸技术制备导电性能优异的纸基材料(PANI-AP/CP). 对其形貌结构、 导电性能及PANI分布均匀性进行了表征, 并研究了环境湿度、 温度、 pH值及放置时间对PANI-AP/CP导电性能的影响. 研究结果表明, PANI-AP表面粗糙度增加, 结晶度增加, 出现含醌式结构的导电PANI的衍射峰, 说明PANI成功修饰于AP表面. 采用该方法制备的PANI-AP/CP导电性能与分布均匀性均得到提高, 相对于碳纤维纸基材(CP), PANI-AP/CP的电导率为3.937 S/cm, 导电性能提高153.5%. 与PANI原位生长于CP(AP/CP-PANI)相比, PANI-AP/CP的导电性能提高34.6%, 总色差值(DE)降低74.9%.

Surface Modified Aramid Pulp with Polyaniline and Conductivity of Its Paper-based Materials

PANI-AP was prepared by modifying polyaniline（PANI） on the surface of aramid pulp（AP）， and then blended with carbon fiber to prepare paper-based material（PANI-AP/CP） with excellent electrical conductivity by wet papermaking technology. The morphology， conductivity and PANI distribution uniformity of PANI-AP/CP were characterized， and the effects of environmental humidity， temperature， pH， and storage time on the electrical conductivity of PANI-AP/CP were explored. The results showed that after PANI modification， the surface roughness and crystallinity of AP increased， and the appearance of diffraction peaks of conductive polyaniline containing quinone structure showed that polyaniline was successfully modified on aramid pulp. For the PANI-AP/CP prepared by this method， both the properties and the distribution uniformity were improved. Compared with the carbon fiber paper substrate （CP） and the AP/CP-PANI， the conductivity of PANI-AP/CP（3.937 S/cm） increased by 153.5% and 34.6%， respectively， and the average total color difference（DE） was reduced by 74.9% compared with AP/CP-PANI.