One-dimensional ion-conductive polymer films: Alignment and fixation of ionic channels formed by self-organization of polymerizable columnar liquid crystals
One-dimensional ion-conductive polymer films: Alignment and fixation of ionic channels formed by self-organization of polymerizable columnar liquid crystals
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DOI：
10.1021/ja0606935
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发表时间：
2006-04-26
影响因子：
15
通讯作者：
Kato, T
中科院分区：
文献类型：
--
作者：
Yoshio, M;Kagata, T;Kato, T
我们已经制备了两种类型的一维离子导电聚合物薄膜，它们都包含垂直于薄膜表面和平行于薄膜表面的离子纳米通道。这些薄膜是通过外围带有丙烯酸酯基团的扇形咪唑盐的定向柱状液晶的光聚合而获得的。在柱状结构中，离子部分自组装到柱的内部。用3-氨丙基三乙氧基硅烷对玻璃和氧化铟锡表面进行改性，用不同的方法对柱子进行宏观取向：垂直于玻璃表面的取向和机械剪切平行于玻璃表面的取向。测量了垂直于表面和平行于表面的柱状取向薄膜的离子电导率。对于光聚合固定的取向薄膜，观察到各向异性离子电导。平行于柱状轴的离子电导率高于垂直于柱状轴的离子电导率，这是因为亲油部分起到了离子绝缘的作用。柱子垂直于表面取向的薄膜的离子电导率各向异性高于柱子平行于表面的薄膜。
We have prepared two types of one-dimensional ion-conductive polymer films containing ion nanochannels that are both perpendicular and parallel to the film surface. These films have been obtained by photopolymerization of aligned columnar liquid crystals of a fan-shaped imidazolium salt having acrylate groups at the periphery. In the columnar structure, the ionic part self-assembles into the inner part of the column. The column is oriented macroscopically in two directions by different methods: orientation perpendicular to the modified surfaces of glass and indium tin oxide with 3-(aminopropyl)triethoxysilane and orientation parallel to a glass surface by mechanical shearing. Ionic conductivities have been measured for the films with columnar orientation vertical and parallel to the surface. Anisotropic ionic conductivities are observed for the oriented films fixed by photopolymerization. The ionic conductivities parallel to the columnar axis are higher than those perpendicular to the columnar axis because the lipophilic part functions as an ion-insulating part. The film with the columns oriented vertically to the surface shows an anisotropy of ionic conductivities higher than that of the film with the columns aligned parallel to the surface.