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...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-06-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/7/654 |
| _version_ | 1797445342812176384 |
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| author | Steven Kluge Tillmann Kose Murat Tutuş |
| author_facet | Steven Kluge Tillmann Kose Murat Tutuş |
| author_sort | Steven Kluge |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-09T13:24:24Z |
| format | Article |
| id | doaj.art-766df00bdba54d37a85161a67a8cce94 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T13:24:24Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-766df00bdba54d37a85161a67a8cce942023-11-30T21:25:52ZengMDPI AGMembranes2077-03752022-06-0112765410.3390/membranes12070654Tuning the Morphology and Gas Separation Properties of Polysulfone MembranesSteven Kluge0Tillmann Kose1Murat Tutuş2Fraunhofer Institute for Applied Polymer Research IAP, 14476 Potsdam, GermanyFraunhofer Institute for Applied Polymer Research IAP, 14476 Potsdam, GermanyFraunhofer Institute for Applied Polymer Research IAP, 14476 Potsdam, GermanyThe 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.https://www.mdpi.com/2077-0375/12/7/654biogasgas separationpolysulfone membranemembrane morphologyflat sheet membranes |
| spellingShingle | Steven Kluge Tillmann Kose Murat Tutuş Tuning the Morphology and Gas Separation Properties of Polysulfone Membranes Membranes biogas gas separation polysulfone membrane membrane morphology flat sheet 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 | biogas gas separation polysulfone membrane membrane morphology flat sheet membranes |
| url | https://www.mdpi.com/2077-0375/12/7/654 |
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