聚苯胺导电膜电致变色机理研究

Study of Electrochromic Behavior of Conducting Polyaniline Film

摘要: 采用乙腈(高氯酸水溶液电解体系,其pH=1及0.5~0.6 V恒电位电解聚合,得到了均匀、绿色、有光泽、导电率为10-1s·cm1的聚苯胺导电膜。研究了掺杂剂、苯胺浓度、pH值和电解电位等对膜的导电率、成膜质量及电致变色反应的影响。采用循环伏安方法研究了显色反应机理,并确定HClO4为最佳掺杂剂。当施加-0.2~0.8 V电压时,实现了黄-绿-蓝色的可逆电致变色反应。

Abstract: Highly conducting polyaniline film is obtained by controlled-potential electrolyze at 0.5~0.6 V (vs.SCE) with Ni electrode (2.0 cm×3.0 cm). Doping agent, aniline concentrations, PH, electrolytic voltage are studied in detail. The best doping agent is HClO4, and the electrolytic system is CH3CN, HClO4, H2O system. Mechanism of electrochromic reaction is investigated by cyclic voltammetry at -0.2~0.8 V. The electrochromic region is yellow-green-blue and the conductivity of the film is 10-1s·cm-1.