聚苯胺
掺杂剂
溶解度
材料科学
水解
化学
导电聚合物
水溶液
聚苯胺纳米纤维
基础(拓扑)
兴奋剂
无机化学
电导率
高分子化学
聚合
苯胺
有机化学
聚合物
物理化学
数学分析
光电子学
数学
作者
Shôji Itô,Katsuyuki Murata,Seiichi Teshima,Ryuji Aizawa,Yoshinobu Asako,Kohshin Takahashi,Brian M. Hoffman
标识
DOI:10.1016/s0379-6779(98)00074-5
摘要
A water-soluble externally (HCl)-doped conducting polyaniline (ED-SPAN) is prepared by such a simple synthetic method that emeraldine salts are sulfonated by chlorosulfonic acid in dichloroethane at 80°C and subsequently hydrated in water at 100°C. Sulfonating any emeraldine salts (counter anion X− = Cl−, SO42−, and BF4−) or emeraldine base results in the production of HCl-doped sulfonated polyaniline, where HCl dopant from hydrolysis of chlorosulfonic group exchanges with the original dopant. The degree of sulfonation, namely, sulfur-to-nitrogen (S/N) ratio, can be controlled by adjusting the amount of chlorosulfonic acid. With increasing S/N ratio from 0.65 to 1.3, the solubility in neutral water increases from 22 to 88 g/l and the four-probe conductivity for a compressed pellet decreases from 0.023 to 1.7 × 10−5 S/cm, showing sulfonation-induced undoping.
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