导电聚吡咯的电化学行为及表面形貌研究  

Electrochemical Behavior and Surface Morphology of Conducting Polypyrrole

作　　者：肖迎红[1] 王静[1] 孙晓亮[1] 车剑飞[1] 汪信[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《南京理工大学学报》2005年第4期483-485,490,共4页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(50373019)

摘　　要：以水为溶剂,分别选用对甲苯磺酸、对甲苯磺酸钠、高氯酸锂、硫酸氢钾、硫酸钠、十二烷基苯磺酸钠为支持电解质,用电化学法合成聚吡咯(PPy)膜。采用循环伏安法(CV)、交流阻抗谱(EIS)研究了PPy膜的电化学行为,结果表明掺杂阴离子种类及聚合时间对EIS曲线有很大的影响。采用扫描电子显微镜(SEM)对PPy膜表面形貌进行表征,观察到聚合时间和电流密度对其表面形貌影响极大。聚合时间长、电流密度小生成的PPy膜表面较为平整、致密;反之,表面较为粗糙、疏松多孔。最佳聚合时间为20min、电流密度为100μA/cm2。Polypyrrole films were obtained by electrochemical polymerization from aqueous pyrrole solution, with TsOH, TsONa, LiCl04, KHSO4, Na2SO4, Cl2SONa as the supporting electrolytes respectively. Electrochemical behavior of polypyrrole films was studied by cyclic voltammetry（CV） and electrochemical impedance spectroscopy （EIS）. It showed that different dopants and polymerization time had a great influence on EIS curves . Surface morphology of PPy films was characterized with scanning electron microscopy （ SEM）. It was observed that the polymerization time and the current density had a crucial influence on surface morphology of PPy films. Long polymerization time and low current density made the surface of PPy films smooth and fine. On the contrary, the surface morphology of PPy films was coarse and loose. The optimum conditions were 20 min of polymerization time and 100 μcm^2 of current density.

关 键 词：聚吡咯 电化学聚合 循环伏安特性 交流阻抗谱 表面形貌 

分 类 号：O631.11[理学—高分子化学]