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Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes

The present work deals with the modification of casting solutions for polysulfone gas separation membranes fabricated by wet-phase inversion. The aim was to fabricate membranes with thin gas separation layers below one micrometer of thickness and a sponge-like support structure. With decreasing thic...

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Detalles Bibliográficos
Autores principales: Kluge, Steven, Kose, Tillmann, Tutuş, Murat
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9323048/
https://www.ncbi.nlm.nih.gov/pubmed/35877857
http://dx.doi.org/10.3390/membranes12070654
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author Kluge, Steven
Kose, Tillmann
Tutuş, Murat
author_facet Kluge, Steven
Kose, Tillmann
Tutuş, Murat
author_sort Kluge, Steven
collection PubMed
description The present work deals with the modification of casting solutions for polysulfone gas separation membranes fabricated by wet-phase inversion. The aim was to fabricate membranes with thin gas separation layers below one micrometer of thickness and a sponge-like support structure. With decreasing thicknesses of the separation layers, increasing permselectivities were observed. For the first time, we could show that permeabilities and diffusion coefficients of certain gases are orders of magnitude lower in separation layers of membranes below 500 Å of thickness compared to separation layers with a thickness above 1 micrometer. These results indicate that the selection of the solvent system has a huge impact on the membrane properties and that the permeability and diffusion coefficient are not material-related properties. Thus, they cannot be applied as specific indicators for gas-separating polymers. In this publication, scanning electron microscopy and gas permeation measurements were carried out to prove the gas separation properties and morphologies of polysulfone membranes.
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spelling pubmed-93230482022-07-27 Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes Kluge, Steven Kose, Tillmann Tutuş, Murat Membranes (Basel) Article The present work deals with the modification of casting solutions for polysulfone gas separation membranes fabricated by wet-phase inversion. The aim was to fabricate membranes with thin gas separation layers below one micrometer of thickness and a sponge-like support structure. With decreasing thicknesses of the separation layers, increasing permselectivities were observed. For the first time, we could show that permeabilities and diffusion coefficients of certain gases are orders of magnitude lower in separation layers of membranes below 500 Å of thickness compared to separation layers with a thickness above 1 micrometer. These results indicate that the selection of the solvent system has a huge impact on the membrane properties and that the permeability and diffusion coefficient are not material-related properties. Thus, they cannot be applied as specific indicators for gas-separating polymers. In this publication, scanning electron microscopy and gas permeation measurements were carried out to prove the gas separation properties and morphologies of polysulfone membranes. MDPI 2022-06-25 /pmc/articles/PMC9323048/ /pubmed/35877857 http://dx.doi.org/10.3390/membranes12070654 Text en © 2022 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
Kluge, Steven
Kose, Tillmann
Tutuş, Murat
Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title_full Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title_fullStr Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title_full_unstemmed Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title_short Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes
title_sort tuning the morphology and gas separation properties of polysulfone membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9323048/
https://www.ncbi.nlm.nih.gov/pubmed/35877857
http://dx.doi.org/10.3390/membranes12070654
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