绝缘基底上两步法聚合导电聚吡咯膜的研究

STUDY ON THE CONDUCTING PPy FILM PREPARED BY TWO STEPS POLYMERIZATION ON THE INSULATING SUBSTRATE

在绝缘性陶瓷基底上,运用先化学聚合、再以所得的聚吡咯(PPy)膜为电极进行电化学聚合的两步聚合法生成了电导率较高、活性高的PPy膜。SEM和电导率的测试结果表明电化学聚合过程中膜的厚度增加不明显,大部分电流基本上都用于化学聚合所得膜的修补和致密化,这可使膜的电导率提高10倍以上。FT-IR红外分析表明,所得的PPy膜并没有随聚合时间的延长而发生氧化,仍保持较高的化学活性。

The polypyrrole (PPy) films with high conductivity and good activity are got by using two steps polymerization methods on the insulating substrate, that is chemical polymerization firstly, and electrochemical polymerization secondly by using the first films as electrode. The SEM analysis performed on the cross-section and the conductivity measurement of PPy films show that the thickness increasing of films are not very apparent. Most of the currents are used to repair the previous films and make them compaction. This is the key reason improving the conductivity of the films. The FT-IR analysis show that although the polymerization time increase, the films can not be oxidized and keep good chemical activeity.