活性碳纤维在硫酸介质中电沉积聚苯胺

Electrochemical deposited polyaniline on a carbon fiber electrode in sulfuric acid electrolyte

利用活性碳纤维电极在硫酸溶液中采用循环伏安方法电沉积聚苯胺．随着聚苯胺的生长，循环伏安图中出现四个可逆的氧化还原峰．与聚苯胺的沉积生长对应的阴极沉积电量随着单体浓度、电解质浓度的增大而增大，随着扫描速率增大而减少．理论计算扫描电镜的结果都表明，活性碳纤维电极表面沉积的聚苯胺分为两层，底层为致密的结构，上层为低密度的开放性结构．

Polyaniline was electrosynthesized on a carbon fiber electrode in sulfuric acid by the cyclic voltammetric technique. The voltammogram showed four reversible redox systems with the growth process. The electrodeposition charge on the carbon fiber electrode corresponding to the growth of polyaniline increased with increasing aniline and electrolyte concentration, and increased with decreasing scan rate. The open structure morphology of polyaniline was observed by scanning electron microscopy. According to theoretical calculation and the morphology of polyaniline it was proposed that the electrochemically synthesized polyaniline consisted of two types of layers. The first one formed at the early stage of growth and was of a compact structure, while the second layer was of a less dense open structure.