基于聚(2-丙烯酰胺基-2-甲基丙磺酸)表面活性剂和掺杂剂的聚苯胺中空微球

Poly(2-acrylamido-2-methylpropane sulfonic acid) as Surfactant and Dopant for Preparation of Polyaniline Hollow Microspheres

采用自组装法分别在表面活性剂2-丙烯酰胺-2-甲基丙磺酸(AMPS)、十二烷基磺酸钠(SDBS)和聚(2-丙烯酰胺基-2-甲基丙磺酸)(PAMPS)水溶液中合成聚苯胺,用扫描电镜、透射电镜和比表面分析仪对不同表面活性剂合成的聚苯胺进行表征;用PAMPS对聚苯胺进行掺杂,采用红外光谱、紫外光谱、X射线光电子能谱等探讨PAMPS对聚苯胺的掺杂效应;通过循环伏安法和电化学阻抗法研究PAMPS掺杂聚苯胺的电化学性能。结果表明,PAMPS能够更好地调控聚苯胺的形貌和提高聚苯胺微球的分散性,以及更好地起到表面活性剂效果;PAMPS掺杂后的聚苯胺的电导率提高到了100S/cm级别,比未掺杂态聚苯胺提高了近104倍,具有更大响应电流,展现出更大的电容量。

Polyaniline（ PANI） was synthesized by self-assembly method in aqueous solutions of 2-acrylamido-2-methylpropane sulfonic acid（ AMPS）,sodium laurylsulfonate（ SDBS） and poly（ 2-acrylamido-2-methylpropane sulfonic acid）（ PAMPS）,respectively. PANI synthesized with different surfactants was characterized by SEM,TEM and specific surface analyzer. The doping effects of PAMPS on PANI were investigated by FT-IR,UV spectra and XPS. The electrochemical properties of PANI were investigated by cyclic voltammetry and electrochemical impedance spectroscopy.The results show that PAMPS could better control the morphology and dispersion of PANI. The electrical conductivity of PANI doped with PAMPS increases to 8. 95 S/cm,which is nearly 104 times higher than that of de-doped PANI. PANI doped with PAMPS has a larger response current and shows a larger capacitance.