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Experimental determination of the streaming potential across cation-exchange membranes with different morphologies

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García Villaluenga, Juan Pedro and Somovilla, Pilar and Barragán García, Vicenta María and Izquierdo Gil, María Amparo (2016) Experimental determination of the streaming potential across cation-exchange membranes with different morphologies. Journal of Membrane Science (500). pp. 16-24. ISSN 0376-7388

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Official URL: http://dx.doi.org/10.1016/j.memsci.2015.11.030


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Abstract

Liquid uptake and streaming potential have been determined in aqueous sodium chloride solutions for five different commercial sulfonated polymer cation-exchange membranes. The selected membranes have distinct morphologies and electrochemical properties. Differences in the liquid uptake properties of the membranes have been found, which have been analysed on the basis of the structure and the chemical properties of the membranes. In most of the membranes analyzed, the higher the liquid content of the membranes, the lower the effective concentration of fixed charges in the membranes. The streaming potential across the membranes increases linearly with the established pressure difference, and it is larger in heterogeneous membranes than in homogeneous ones. In general, the higher the membrane liquid content, the higher the streaming potential across the membranes.


Item Type:Article
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© 2016 Journal of Membrane Science.
The author would like to thank the anonymous reviewers for
their valuable comments and suggestions to improve the quality of the paper. Financial support of this work by Banco de Santander and Universidad Complutense de Madrid within the framework of Project PR6/13-18853 is gratefully acknowledged.

Uncontrolled Keywords:Electro-kinetic phenomena; Non-equilibrium thermodynamics; Cation-exchange membranes
Subjects:Sciences > Physics
Sciences > Physics > Thermodynamics
ID Code:35068
Deposited On:20 Jan 2016 19:22
Last Modified:20 Jan 2016 19:22

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