首先通过化学氧化法制备本征态聚苯胺(EB), 然后利用4种质子酸(DBSA、SSA、HCl、H3PO4)对EB进行二次掺杂制备了二次掺杂聚苯胺(PANI), 通过研究质子酸浓度、掺杂时间和掺杂温度对二次掺杂PANI电导率的影响, 得到了最适宜的二次掺杂条件, 并考察了最适宜掺杂条件下制备的二次掺杂PANI的结构和形貌。结果表明: 最适宜的二次掺杂条件为掺杂剂浓度1.0 mol·L-1, 掺杂时间6 h, 掺杂温度为25 ℃, 此时二次掺杂PANI的电导率最高, 其中DBSA二次掺杂PANI的电导率最高, 为3.301 S·cm-1; 与EB相比, 二次掺杂PANI的红外特征峰变宽且向低频移动; DBSA二次掺杂PANI的结晶度最高, 其微观结构由较为分散的圆形颗粒组成。

Eigenstate polyaniline was prepared by chemical oxidation method, and then was doped by four kinds of protonic acids (hydrochloric acid, phosphate acid, dodecylbenzene sulfonate acid and sulfosalicylic acid) to prepare dual-doped polyaniline (PANI). The most suitable doping conditions were obtained by studying the effects of protonic acids concentration, adopping time and temperature on conductivity of dual-doped PANI. Moreover, the structure and morphology of dual-doped PANI obtained under the most suitable conditions were investigated. The results indicate that the most suitable doping conditions were adoping condition of 1.0 mol·L-1, doping temperature of 25 ℃, doping time of 6 h. Dual-doped PANI obtained under the most suitable conditions had the highest conductivity, was 3.301 S·cm-1. Compared with eigenstate polyaniline, the infrared characteristic peaks of dual doped PANI was wider and moved to low frequency. DBSA doped PANI had the highest crystallinity, and its microstructure was composed of scattered round particles.