Electroosmotic drag in polymer electrolyte membranes: an electrophoretic NMR study

Citation
M. Ise et al., Electroosmotic drag in polymer electrolyte membranes: an electrophoretic NMR study, SOL ST ION, 125(1-4), 1999, pp. 213-223
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE IONICS
ISSN journal
01672738 → ACNP
Volume
125
Issue
1-4
Year of publication
1999
Pages
213 - 223
Database
ISI
SICI code
0167-2738(199910)125:1-4<213:EDIPEM>2.0.ZU;2-P
Abstract
Electrophoretic NMR has been applied for the first time to measure electroo smotic drag coefficients K-drag in polymer electrolyte membranes. Theoretic al and experimental details of the method are discussed and measurements of K-drag as a function of water content and temperature are reported for Naf ion(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 wa ter contents of the highest proton conductivities observed (n = 20 for Nafi on 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 hydrodyn amic model equation with the rate of proton transfer processes and the wate r-polymer interaction as parameters is used for the interpretation of the d ata. (C) 1999 Elsevier Science B.V. All rights reserved.