Proton-Conductivity Enhancement in Polymer Thin Films
Proton-Conductivity Enhancement in Polymer Thin Films
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DOI：
10.1021/acs.langmuir.7b01484
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发表时间：
2017-11-07
期刊：
影响因子：
3.9
通讯作者：
Nagao, Yuki
中科院分区：
文献类型：
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作者：
Nagao, Yuki
高质子导电性聚合物在能量转换、传感器、催化剂等方面的应用一直受到研究者的关注。从制造高质子导电聚合物的科学史来看，一种基本的方法是基于具有强酸性基团的相分离结构的策略。这篇专题文章介绍了一种增强聚合物薄膜质子导电性的新方法，该方法使用一个界面，该界面可以通过基片表面和聚合物之间的相互作用来改变聚合物结构的自由度。我将被抑制的质子导电性引入Nafion薄膜，然后专门研究聚合物分子取向对质子导电性的增强作用。作为最后一个主题，我们利用溶致液晶特性展示了一种高质子导电性的有序聚酰亚胺薄膜。分子有序化和面内取向结构都能提高质子导电性。此外，由分子量得到的光学结构域和分子有序度对质子输运性质有很大的贡献。
Highly proton conductive polymers have long attracted the attention of researchers for use in energy conversion, sensors, catalysts, and other applications. From the viewpoint of the scientific history of the creation of highly proton conductive polymers, one fundamental approach is based on the strategy of phase-segregated structures with strong acid groups. This Feature Article presents a new approach to enhancing the proton conductivity of the polymer thin films using an interface that can modify the degrees of freedom for a polymer structure through interaction between the substrate surface and polymers. I introduce suppressed proton conductivity into Nafion thin films and then specifically examine the enhancement in proton conductivity by the molecular orientation of the polymers. As the last topic, a highly proton conductive organized polyimide thin film is demonstrated using the lyotropic liquid-crystal property. Both molecular ordering and the in-plane oriented structure can enhance proton conductivity. Moreover, the optical domain and degree of molecular ordering derived from the molecular weight can contribute strongly to the proton transport property.