聚乙烯醇-聚吡咯复合纳米纤维的制备及其导电性能

利用化学氧化法制备出导电聚吡咯（PPy），与聚乙烯醇（PVA）共混后，采用静电纺丝技术制备PVA-PPy纳米共混纤维，随后加入对甲苯磺酸钠（TSNa）、十二烷基磺酸钠（DSNa）、十二烷基苯磺酸钠（DBSNa）和磺基琥珀酸二乙基己酯钠（DEHS）等不同掺杂剂改变纤维的结构和性能，采用SEM、TGA和四探针测试仪检测了纳米纤维的形貌、热稳定性和导电性能。结果表明，掺杂剂、PPy制备技术及聚合物添加剂对PPy的形貌、热稳定性和导电性能有很大影响。纳米纤维的电导率远远高于用同样掺杂剂所制备的PVA-PPy薄膜和PPy粉末，四种纳米纤维中DEHS掺杂PVA-PPy纳米纤维的电导率最高，可达26.64 S/cm。

Fabrication and conductive properties of polyvinyl alcohol-polypyrrole composite nano fibers

Polypyrrole (PPy) was synthesized by chemical oxidation methods in the presence of toluene sulfonate (TSNa), dodecyl sulfonic acid sodium salt (DSNa), dodecyl-benzene sulfonic acid sodium salt (DBSNa) and di-(2-ethylhexyl) sulfosuccinate sodium salt (DEHS), and then PPy was mixed with polyvinyl alcohol (PVA). PVA-PPy composite nano fibers were prepared via electrospinning. The microstructure, thermal stability and conductivity properties were investigated using SEM, TGA and four-probe tester. The results show that dopants, PPy preparation technology and polymer additives have a great influence on the electrical properties of PPy. The conductivity of nanofibers is much higher than the obtained PVA-PPy films and PPy powders with the same dopant. The conductivity of DEHS doped PVA-PPyPVA-PPy nanofibers is highest among all nanofibers, which reaches to 26.64 S/cm.