Synthesis and Electrical Characterization of Self-Supported Conducting Polypyrrole-Poly(vinylidene fluoride) Composite Films

Manish Taunk, A. Kapil, S. Chand
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引用次数: 13

Abstract

We report the synthesis of polypyrrole composite films by chemical oxidation polymerization of pyrrole dif- fused inside poly(vinylidene fluoride) matrix and temperature dependant dc conductivity study of these composite films. Ammonium persulfate is used as an oxidizing agent and HCl as the dopant in aqueous medium. This technique produces highly conductive, flexible and free standing polymer composite films in semi-interpenetrating architecture. It is observed that conductivity of the composite films can be controlled by varying the dopant concentration. The variation of conduc- tivity with temperature indicates the semiconducting nature of these composite films. The temperature dependence of conductivity is explained in the light of two different models from which activation energy (Ea) and other hopping pa- rameters are determined. Experimental data fits well with variable range hopping model and three dimensional charge transport mechanism is shown to occur in these films.
自支撑导电聚吡咯-聚偏氟乙烯复合薄膜的合成及电学特性
本文报道了吡咯在聚偏氟乙烯基体内扩散的化学氧化聚合法制备了聚吡咯复合膜,并研究了复合膜的直流电导率随温度的变化规律。在水介质中以过硫酸铵为氧化剂,盐酸为掺杂剂。该技术可生产具有半互穿结构的高导电性、柔性和独立的聚合物复合薄膜。观察到复合膜的电导率可以通过改变掺杂剂浓度来控制。电导率随温度的变化表明复合薄膜具有半导体性质。用两种不同的模型解释了电导率的温度依赖性,由此确定了活化能(Ea)和其他跳变参数。实验数据与变程跳变模型吻合较好,证明了薄膜中存在三维电荷输运机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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