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Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation

Herein, experimental and theoretical approaches were used to design a new composite membrane for desalination by pervaporation. The theoretical approaches demonstrate the possibility to reach high mass transfer coefficients quite close to those obtained with conventional porous membranes if two cond...

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Detalles Bibliográficos
Autores principales: Eljaddi, Tarik, Favre, Eric, Roizard, Denis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10301471/
https://www.ncbi.nlm.nih.gov/pubmed/37367803
http://dx.doi.org/10.3390/membranes13060599
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author Eljaddi, Tarik
Favre, Eric
Roizard, Denis
author_facet Eljaddi, Tarik
Favre, Eric
Roizard, Denis
author_sort Eljaddi, Tarik
collection PubMed
description Herein, experimental and theoretical approaches were used to design a new composite membrane for desalination by pervaporation. The theoretical approaches demonstrate the possibility to reach high mass transfer coefficients quite close to those obtained with conventional porous membranes if two conditions are verified: (i) a dense layer with a low thickness and (ii) a support with a high-water permeability. For this purpose, several membranes with a cellulose triacetate (CTA) polymer were prepared and compared with a hydrophobic membrane prepared in a previous study. The composite membranes were tested for several feed conditions, i.e., pure water, brine and saline water containing a surfactant. The results show that, whatever the tested feed, no wetting occurred during several hours of desalination tests. In addition, a steady flux was obtained together with a very high salt rejection (close to 100%) for the CTA membranes. Lastly, the CTA composite membrane was tested with real seawater without any pretreatment. It was shown that the salt rejection was still very high (close to 99.5%) and that no wetting could be detected for several hours. This investigation opens a new direction to prepare specific and sustainable membranes for desalination by pervaporation.
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spelling pubmed-103014712023-06-29 Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation Eljaddi, Tarik Favre, Eric Roizard, Denis Membranes (Basel) Article Herein, experimental and theoretical approaches were used to design a new composite membrane for desalination by pervaporation. The theoretical approaches demonstrate the possibility to reach high mass transfer coefficients quite close to those obtained with conventional porous membranes if two conditions are verified: (i) a dense layer with a low thickness and (ii) a support with a high-water permeability. For this purpose, several membranes with a cellulose triacetate (CTA) polymer were prepared and compared with a hydrophobic membrane prepared in a previous study. The composite membranes were tested for several feed conditions, i.e., pure water, brine and saline water containing a surfactant. The results show that, whatever the tested feed, no wetting occurred during several hours of desalination tests. In addition, a steady flux was obtained together with a very high salt rejection (close to 100%) for the CTA membranes. Lastly, the CTA composite membrane was tested with real seawater without any pretreatment. It was shown that the salt rejection was still very high (close to 99.5%) and that no wetting could be detected for several hours. This investigation opens a new direction to prepare specific and sustainable membranes for desalination by pervaporation. MDPI 2023-06-13 /pmc/articles/PMC10301471/ /pubmed/37367803 http://dx.doi.org/10.3390/membranes13060599 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Eljaddi, Tarik
Favre, Eric
Roizard, Denis
Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title_full Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title_fullStr Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title_full_unstemmed Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title_short Design and Preparation a New Composite Hydrophilic/Hydrophobic Membrane for Desalination by Pervaporation
title_sort design and preparation a new composite hydrophilic/hydrophobic membrane for desalination by pervaporation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10301471/
https://www.ncbi.nlm.nih.gov/pubmed/37367803
http://dx.doi.org/10.3390/membranes13060599
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