Electroosmotic drag in polymer electrolyte membranes: an electrophoretic NMR study

被引：206

作者：

Ise, M ^{[1
]}

Kreuer, KD ^{[1
]}

Maier, J ^{[1
]}

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

来源：

SOLID STATE IONICS | 1999年 / 125卷 / 1-4期

关键词：

electrophoretic NMR (ENMR); electroosmotic drag coefficient;

D O I：

10.1016/S0167-2738(99)00178-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electrophoretic NMR has been applied for the first time to measure electroosmotic drag coefficients K-drag in polymer electrolyte membranes. Theoretical and experimental details of the method are discussed and measurements of K-drag as a function of water content and temperature are reported for Nafion(R) 117 and sulfonated PEEKK. For a given water content n = [H2O]/[SO3H], the values for sulfonated PEEKK are lower than for Nafion, but for the water contents of the highest proton conductivities observed (n = 20 for Nafion n = 40 for sulfonated PEEKK), the results are similar for both polymers (K-drag = 2.6 for Nafion and K-drag = 3.1 for sulfonated PEEKK). A hydrodynamic model equation with the rate of proton transfer processes and the water-polymer interaction as parameters is used for the interpretation of the data. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：213 / 223

页数：11

共 15 条

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