聚吡咯复合膜材料制备、表征及阳离子交换性能研究  

Electropolymerization,characterization and cation exchange characteristic of polypyrrole composite membrane

作　　者：蔡本慧[1] 杨凤林[1] 柳丽芬[1] 

机构地区：[1]大连理工大学环境与生命学院,工业生态与环境工程教育部重点实验室,大连116024

出　　处：《化工新型材料》2008年第12期78-80,共3页New Chemical Materials

摘　　要：以活性炭纤维(ACF)为基底电极,采用电化学恒电位聚合法制备了掺杂十二烷基苯磺酸阴离子(DBS-)的聚吡咯(PPy)复合膜(ACF/PPy/DBS),分别考察了聚合时间为0.5h和1h的两种复合膜(APD0.5和APD1)对Ca2+的离子交换性能和电流效率,并使用扫描电镜表征和分析了复合膜的形貌。结果表明,复合膜的膜厚随聚合时间的延长而增加,膜厚与Ca2+的交换量成正比,但对离子交换的电流效率没有明显影响。在Ca2+的掺杂过程中,复合膜内Ca2+离子的掺杂量和电流效率随阴极极化电位的负移而增大;在Ca2+的解析过程中,复合膜内Ca2+离子解析的电流效率随阳极极化电位的正移而降低,但解析量的变化不大。Polypyrrole （PPy） composite membranes doped with dodecylbenzenesulphonate （DBS-） as doping anion were electrochemically prepared on active carbon fiber felt （ACF） substrate electrode from aqueous solution. The ion exchange characteristics and current effieieneies of the composite membranes were studied for two different thickness PPy composite membranes APD0. 5 and APD1 （electrochemical polymerization time 0. 5 and 1. 0h）, respectively. The morphology of membrane was characterized using scanning electron microscope （SEM）. The thickness of DBS/PPy composite membrane increased obviously with the electropolymerization time, resulting in the linear increase in the capacity of ion exchange. But the thickness of composite membrane did not influence the current efficiency remarkably. For the doping process of cation, Ca^2＋ ion doping capacity and current efficiency increased with the decrease of the cathodic polarization potential. Ion undoping capacity was not influenced by the anodic polarization potential, but the current efficiency decreased obviously with the increase of the anodic polarization potential.

关 键 词：聚吡咯 电控离子交换 电化学聚合 活性炭纤维 十二烷基苯磺酸 

分 类 号：TQ326.6[化学工程—合成树脂塑料工业]