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首页> 外文期刊>Electroanalysis >Effective charge trapping in bilayers of conducting polymers based on polypyrrole and poly(N-methylpyrrole)
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Effective charge trapping in bilayers of conducting polymers based on polypyrrole and poly(N-methylpyrrole)

机译：基于聚吡咯和聚（N-甲基吡咯）的导电聚合物双层中的有效电荷俘获

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Bilayers of conducting polymers composed of polypyrrole doped with poly(4-styrenesulfonate) [PPy(PSS)] or dodecylsulfate ions [PPy(DS)] and poly(N-methylpyrrole) (PMPy) or polypyrrole (PPy) doped with perchlorate ions were studied using voltammetric, chronoamperometric and EDAX methods. The polymers were used in the following sequence (inner layer / outer layer): PPy(PSS)/PPy, PMPy/PPy(DS) and PPy(DS)/PMPy. Charge trapping effects were studied by comparing redox charges of bilayers and single polymeric layers. For PPy(PSS)/PPy bilayers a very effective trapping of the inner layer in the oxidized state was found in solutions of BaCl2, because Ba2+ ions, which are necessary to reduce the inner layer, could not penetrate the outer PPy film. For bilayers PPy(DS)/PMPy and PMPy/PPy(DS) the charge of the inner layer was also found to be almost completely trapped, i.e., these layers are in the oxidized state, independent of the potential applied. This effect results from limited permeability of PPy(DS) for ions, due to the presence of surface active dodecylsulfate ions, inhibiting penetration of PPy(DS) by ions and moreover from low permeability of PMPy for cations needed to reduce PPy(DS) in PPy(DS)/PMPy bilayers. [References: 21]
机译：由掺杂有聚（4-苯乙烯磺酸盐）[PPy（PSS）]或十二烷基硫酸根离子[PPy（DS）]的聚吡咯和掺杂有高氯酸根离子的聚（N-甲基吡咯）（PMPy）或聚吡咯（PPy）组成的双层导电聚合物使用伏安法，计时电流法和EDAX方法进行了研究。聚合物按以下顺序使用（内层/外层）：PPy（PSS）/ PPy，PMPy / PPy（DS）和PPy（DS）/ PMPy。通过比较双层和单个聚合物层的氧化还原电荷，研究了电荷俘获效应。对于PPy（PSS）/ PPy双层，在BaCl2溶液中发现了非常有效的内层在氧化态中的捕集，因为还原内层所必需的Ba2 +离子无法穿透外层PPy膜。对于双层PPy（DS）/ PMPy和PMPy / PPy（DS），还发现内层的电荷几乎被完全俘获，即，这些层处于氧化态，与施加的电势无关。产生这种效果的原因是：由于存在表面活性的十二烷基硫酸根离子，PPy（DS）对离子的渗透性有限，抑制了离子对PPy（DS）的渗透，而且由于PMPy对降低Py（DS）所需的阳离子的渗透性低。 PPy（DS）/ PMPy双层。 [参考：21]

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