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Electroosmosis through a cation-exchange membrane: Effect of an ac perturbation on the electroosmotic flow

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Barragán García, Vicenta María and Ruiz Bauzá, Carlos (2000) Electroosmosis through a cation-exchange membrane: Effect of an ac perturbation on the electroosmotic flow. Journal of Colloid and Interface Science, 230 (2). pp. 359-366. ISSN 0021-9797

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Official URL: http://dx.doi.org/10.1006/jcis.2000.7063


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Abstract

Electroosmosis experiments through a cation-exchange membrane have been performed using NaCl solutions in different experimental situations. The influence of an alternating (ac) sinusoidal perturbation, of known angular frequency and small amplitude, superimposed to the usual applied continuous (dc) signal on the electroosmotic Row has been studied. The experimental results show that the presence of the ac perturbation affects the electroosmotic flow value, depending on the frequency of the ac signal and on the solution stirring conditions. In the frequency range studied, two regions have been observed where the electroosmotic Row reaches a maximum value: one at low frequencies (similar to Hz); and another at frequencies of the order of kHz. These regions could be related to membrane relaxation phenomena.


Item Type:Article
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© 2000 by Academic Press. Financial support from the University Complutense of Madrid under Project
PR49/98-7756 is gratefully acknowledged.

Uncontrolled Keywords:Cellulose-Acetate Membranes, Impedance, Permeability, Dependence, Phases, Water.
Subjects:Sciences > Physics > Thermodynamics
ID Code:21072
Deposited On:30 Apr 2013 12:03
Last Modified:11 Mar 2016 18:47

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