磺酸基对煤/PAN复合材料导电性能的影响

Effect of functional sulfonic group on the conductivity of coal/PAN composite

研究了两种在煤/聚苯胺(PAN)复合材料聚合中引入磺酸基的方法,通过电导率对比可知,两种方法都有利于提高煤/PAN复合材料的电导率。这是因为质子酸的掺杂使聚苯胺分子内及分子间的电荷离域化增强,电导率大幅度提高;另一方面,磺酸基较大,掺杂到聚苯胺中,降低了聚苯胺分子间的相互作用力,聚苯胺分子以伸展链构象存在,更有利于其电荷离域化,从而使其具有更高的电导率。

Two methods of introducing sulfonie groups into coal were investigated. From conductivity comparison, both methods were proved to be benefit to improve the conductivity of Coal/PAN. Proton acids doping caused the intermolecular and inner-molecular delocatization in PAN and improved the conductivity. On the other hand, the sulfonic groups were relatively large, the inter-molecular action of PAN was decreased with sulfonic groups doping in PAN. The extension state of PAN molecules conformational also enhanced the charge delocalization, and then increased the conductivity.