Abstract: The effect of different types of acidic dopant namely，sulfuric acid （H2SO4)，dodecyl benzene sulfonic acid (DBSA) and compounded acids (H2SO4+DBSA) on the morphology and properties of polyaniline (PANI) films polymerized on gold-plated PET substrates by cyclic voltammetry was investigated. SO42? and DBSA? could incorporate into PANI molecular chains in the polymerization progress. PANI doped with H2SO4 had high conductivity but poor stability in air，while PANI doped with macromolecules DBSA had high stability in air but poor conductivity. Compared with single acid，compounded acids doping could improve not only the characteristics of cyclic voltammogram of PANI in acid solution，but also its stability in air while maintaining high electrical conductivity of PANI.

Key words: electrochemistry, polyaniline, cyclic voltammetry, dodecyl benzene sulfonic acid

摘要： 采用循环伏安（CV）法在镀金PET膜上分别聚合了硫酸（H2SO4）、十二烷基苯磺酸（DBSA）、硫酸-十二烷基苯磺酸掺杂的聚苯胺（PANI）膜，对比研究了掺杂酸种类对PANI结构和性能的影响。结果表明，SO42?、DBSA?可以随聚合过程进入PANI分子链；H2SO4掺杂的PANI具有较高的电导率，但是在空气中的稳定性较差；大分子的DBSA使PANI优先产生单螺旋的纤维，提高了PANI在平行分子链方向上的结晶度和在空气中的稳定性；相对于单一酸掺杂，复合酸掺杂的PANI在酸溶液中电扫描表现出优良的循环伏安特性，在保持较高电导率的同时，提高了PANI在空气中的稳定性。

关键词: 电化学, 聚苯胺, 循环伏安, 十二烷基苯磺酸