Study of the Internal Morphology of Cation-Exchange Membranes by Means of Electroosmotic Permeability Relaxations

被引：2

作者：

Barragan, V. M. ^{[1
]}

Izquierdo-Gil, M. A. ^{[1
]}

Godino, M. P. ^{[1
]}

Villaluenga, J. P. G. ^{[1
]}

机构：

[1] Univ Complutense Madrid, Dept Appl Phys 1, E-28040 Madrid, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2009年 / 113卷 / 39期

关键词：

AC PERTURBATION; TRANSPORT; WATER; BEHAVIOR; METHANOL; FLOW;

D O I：

10.1021/jp903414z

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：

The effect of an ac sinusoidal perturbation of known amplitude and frequency superimposed to the usual dc applied electric voltage difference on the electroosmotic flow through three cation-exchange membranes with different morphology has been studied. A dispersion of the electroosmotic permeability on the frequency of the applied ac signal has been found for the three membranes investigated, observing that the electroosmotic permeability reaches maximum values for some characteristic values of the frequency. These characteristic frequency values, which are related to relaxation processes in heterogeneous media, depend on the membrane system and permit to obtain information about the different structures of the membrane system. Thus, the study of the electroosmotic permeability relaxation can be used as a method to study the internal morphology of a cation-exchange membrane in a given electrolyte medium.

引用

页码：12952 / 12957

页数：6

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