Enhanced electrochemomechanical activity of polyaniline films towards high pH region: contribution of Donnan effect
Enhanced electrochemomechanical activity of polyaniline films towards high pH region: contribution of Donnan effect
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聚苯胺薄膜在高 pH 区域的电化学机械活性增强：唐南效应的贡献
DOI：
10.1016/j.electacta.2004.04.020
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发表时间：
2004
影响因子：
6.6
通讯作者：
K. Kaneto
中科院分区：
文献类型：
--
作者：
W. Takashima;M. Nakashima;S. Pandey;K. Kaneto
在聚苯胺 (PANI) 薄膜的用 HCl 和 NaCl 溶液平衡的电解质中，同时实现了电化学机械变形 (ECMD) 的增强和 ECMD 活性向高 pH 的扩展。在环境温度、pH 3 平衡的 3M HCl 和 3M NaCl 混合物中，最大变形达到 6.7%。通过比较在 pH 0.5 平衡的 1M HCl 中 ECMD 幅度为 3.2% 的事实，简单明智地选择电解质条件可导致 ECMD 幅度增强约两倍。对电导率和吸收光谱的浓度依赖性阐明了质子化比作为电解质浓度的函数的增加。结果表明，高浓度的PANI薄膜在高pH范围内保留了电化学和ECMD活性，这是唐南效应支持的PANI功能的增强。
Enhancement of electrochemomechanical deformation (ECMD) and expansion of ECMD activity towards high pH have been simultaneously achieved in the electrolytes equilibrated with HCl and NaCl solutions for polyaniline (PANI) film. The maximum deformation has been reached to 6.7% in the mixture of 3M HCl and 3M NaCl equilibrated at pH 3 at ambient temperature. By comparing the fact that the ECMD magnitude is 3.2% in 1M HCl equilibrated at pH 0.5, the simple judicious selection of electrolyte condition leads to the enhancement of ECMD magnitude by around two times. The concentration dependence on both electrical conductivity and absorption spectra elucidates the increase of protonation ratio as a function of electrolyte concentration. The results indicate that the high concentration retains both the electrochemical and ECMD activities in PANI film towards high pH region, which is the enhanced functionality of PANI supported by Donnan effect.