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Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions

The aim of this work is to apply linear non-equilibrium thermodynamics to study the electrokinetic properties of three cation-exchange membranes of different structures in ethanol-water electrolyte solutions. To this end, liquid uptake and electro-osmotic permeability were estimated with potassium c...

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Autores principales: Barragán, V. María, Villaluenga, Juan P. G., Morales-Villarejo, Víctor, Izquierdo-Gil, M. Amparo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517228/
https://www.ncbi.nlm.nih.gov/pubmed/33286464
http://dx.doi.org/10.3390/e22060692
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author Barragán, V. María
Villaluenga, Juan P. G.
Morales-Villarejo, Víctor
Izquierdo-Gil, M. Amparo
author_facet Barragán, V. María
Villaluenga, Juan P. G.
Morales-Villarejo, Víctor
Izquierdo-Gil, M. Amparo
author_sort Barragán, V. María
collection PubMed
description The aim of this work is to apply linear non-equilibrium thermodynamics to study the electrokinetic properties of three cation-exchange membranes of different structures in ethanol-water electrolyte solutions. To this end, liquid uptake and electro-osmotic permeability were estimated with potassium chloride ethanol-water solutions with different ethanol proportions as solvent. Current–voltage curves were also measured for each membrane system to estimate the energy dissipation due to the Joule effect. Considering the Onsager reciprocity relations, the streaming potential coefficient was discussed in terms of ethanol content of the solutions and the membrane structure. The results showed that more porous heterogeneous membrane presented lower values of liquid uptake and streaming potential coefficient with increasing ethanol content. Denser homogeneous membrane showed higher values for both, solvent uptake and streaming coefficient for intermediate content of ethanol.
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spelling pubmed-75172282020-11-09 Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions Barragán, V. María Villaluenga, Juan P. G. Morales-Villarejo, Víctor Izquierdo-Gil, M. Amparo Entropy (Basel) Article The aim of this work is to apply linear non-equilibrium thermodynamics to study the electrokinetic properties of three cation-exchange membranes of different structures in ethanol-water electrolyte solutions. To this end, liquid uptake and electro-osmotic permeability were estimated with potassium chloride ethanol-water solutions with different ethanol proportions as solvent. Current–voltage curves were also measured for each membrane system to estimate the energy dissipation due to the Joule effect. Considering the Onsager reciprocity relations, the streaming potential coefficient was discussed in terms of ethanol content of the solutions and the membrane structure. The results showed that more porous heterogeneous membrane presented lower values of liquid uptake and streaming potential coefficient with increasing ethanol content. Denser homogeneous membrane showed higher values for both, solvent uptake and streaming coefficient for intermediate content of ethanol. MDPI 2020-06-20 /pmc/articles/PMC7517228/ /pubmed/33286464 http://dx.doi.org/10.3390/e22060692 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Barragán, V. María
Villaluenga, Juan P. G.
Morales-Villarejo, Víctor
Izquierdo-Gil, M. Amparo
Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title_full Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title_fullStr Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title_full_unstemmed Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title_short Electro-Osmotic Behavior of Polymeric Cation-Exchange Membranes in Ethanol-Water Solutions
title_sort electro-osmotic behavior of polymeric cation-exchange membranes in ethanol-water solutions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7517228/
https://www.ncbi.nlm.nih.gov/pubmed/33286464
http://dx.doi.org/10.3390/e22060692
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