Umeda Minoru, Uchida Isamu
Department of Chemistry, Faculty of Engineering, Nagaoka University of Technology, Kamitomioka 1603-1, Nagaoka, Niigata 940-2188, Japan.
Langmuir. 2006 May 9;22(10):4476-9. doi: 10.1021/la0528551.
A novel proton conductor has been realized by employing a ternary polymer blend system in combination with an electric-field orientation technique. A polymer film recast from a solution containing poly(acrylic acid), poly(vinyl butyral), and fluoroalkyl graft polymer under 2 kV.cm(-1) exhibited 10 times higher proton conductivity than that prepared without the external electric field. However, when the film was prepared under a field higher than 4 kV.cm(-1), proton conductivity decreased. The membranous character has been investigated by SEM and AFM observations. As a result, it has been proven that an electric-field treatment of 2 kV.cm(-1) forms the largest hydrophilic domains for proton conduction in the film. The alteration of the phase separation morphology induced by the electric field well explains the proton conductivity change.
通过采用三元聚合物共混体系并结合电场取向技术，实现了一种新型质子导体。在2 kV·cm⁻¹电场下，由含有聚丙烯酸、聚乙烯醇缩丁醛和氟烷基接枝聚合物的溶液重铸而成的聚合物薄膜，其质子传导率比在无外部电场条件下制备的薄膜高出10倍。然而，当薄膜在高于4 kV·cm⁻¹的电场下制备时，质子传导率下降。通过扫描电子显微镜（SEM）和原子力显微镜（AFM）观察研究了膜的特性。结果表明，2 kV·cm⁻¹的电场处理在薄膜中形成了用于质子传导的最大亲水区域。电场引起的相分离形态变化很好地解释了质子传导率的变化。
