Simultaneous electroosmotic and permeation flows through a Nafion membrane - 1. Aqueous electrolyte solutions

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Barragán García, Vicenta María and Ruiz Bauzá, Carlos and García Villaluenga, Juan Pedro and Seoane Rodríguez, Benjamín (2004) Simultaneous electroosmotic and permeation flows through a Nafion membrane - 1. Aqueous electrolyte solutions. Journal of Colloid and Interface Science, 277 (1). pp. 176-183. ISSN 0021-9797

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Official URL: http://dx.doi.org/doi:10.1016/j.jcis.2004.04.066




Abstract

The volume flow through a Nafion membrane originated by the simultaneous action of an electric potential difference and a pressure difference has been measured using aqueous KCl solutions under different experimental conditions. The behavior has been analyzed when both gradients act in the same and in the opposite sense. The results indicate that the simultaneous action of the pressure and potential differences originates a total flow different from the sum of the electroosmotic and permeation flows due to each force acting separately. The application of irreversible thermodynamics, which includes second-order terms, allowed the determination of the phenomenological coefficients. Moreover, from these values, the equivalent pore radius was estimated on the assumption that the membrane is a porous medium filled with an internal solution.


Item Type:Article
Additional Information:

© 2004 Elsevier. Financial support from the Ministerio de Ciencia y Tecnología of Spain under Project BFM2000-0625 is gratefully
acknowledged.

Uncontrolled Keywords:Nonequilibrium Thermodynamics, Electrokinetic Phenomena, Methanol Crossover, Charged Membranes, Transport, Behavior.
Subjects:Sciences > Physics > Thermodynamics
ID Code:20738
Deposited On:12 Apr 2013 08:15
Last Modified:11 Mar 2016 17:55

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