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Effect of an ac perturbation on the electroosmotic behavior of a cation-exchange membrane. Influence of the cation nature

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Barragán García, Vicenta María and Ruiz Bauzá, Carlos (2001) Effect of an ac perturbation on the electroosmotic behavior of a cation-exchange membrane. Influence of the cation nature. Journal of Colloid and Interface Science, 240 (1). pp. 182-189. ISSN 0021-9797

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Official URL: http://dx.doi.org/10.1006/jcis.2001.7610


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Abstract

The effect of an ac sinusoidal perturbation of known amplitude and frequency superimposed on the usual dc applied electric voltage difference on the electroosmotic flow through a typical cation-exchange membrane has been studied using different monovalent electrolytes. As a general trend, the presence of the ac perturbation increases the value of the electroosmotic flow with respect to the value in the absence of ac perturbation. A dispersion of the electroosmotic permeability on the frequency of the applied ac signal has been found for the three studied electrolytes, observing that the electroosmotic permeability reaches maximum values for some characteristic values of the frequency. This behavior may be related to the different relaxation processes in heterogeneous mediums.


Item Type:Article
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© 2001 by Academic Press. Financial support from the University Complutense of Madrid under Project
PR49/98-7756 is gratefully acknowledged.

Uncontrolled Keywords:Frequency Dielectric-Dispersion, Cellulose-Acetate Membranes, Impedance Spectra, Water, Permeability, Permeation.
Subjects:Sciences > Physics > Thermodynamics
ID Code:21071
Deposited On:30 Apr 2013 12:42
Last Modified:11 Mar 2016 18:45

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