Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret
Hollow fibers (HFs) are widely applied in different membrane operations, particularly in gas separation. The present work investigates the effect of post-spinning treatment on the gas transport properties of polyimide-based HFs. The membranes were spun by using both a conventional spinneret and a tr...
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| Format: | Article |
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MDPI AG
2019-11-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/12/21/3632 |
| _version_ | 1798043571909033984 |
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| author | Paola Bernardo Franco Tasselli Giovanni Chiappetta Gabriele Clarizia |
| author_facet | Paola Bernardo Franco Tasselli Giovanni Chiappetta Gabriele Clarizia |
| author_sort | Paola Bernardo |
| collection | DOAJ |
| description | Hollow fibers (HFs) are widely applied in different membrane operations, particularly in gas separation. The present work investigates the effect of post-spinning treatment on the gas transport properties of polyimide-based HFs. The membranes were spun by using both a conventional spinneret and a triple-orifice spinneret. A systematic analysis was carried out by considering different alcohols as the first fluid for the solvent exchange, with or without <i>n</i>−hexane as a second fluid. The HFs were characterized by exploring the change of the morphology and the permselective properties as a consequence of the operation conditions for spinning and post-treatments. According to the morphology, for a specific hollow fiber type, an optimal post−treatment was identified. The HFs prepared with the triple-orifice spinneret, using a solvent−rich shell fluid, can take advantage of the post-treatment using larger alcohols, while smaller alcohols should be preferred for the conventional spun HFs that present inside−outside double skin layers. |
| first_indexed | 2024-04-11T22:50:58Z |
| format | Article |
| id | doaj.art-bd0808b13b1a444fae9ed06eaf2f2f5c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-04-11T22:50:58Z |
| publishDate | 2019-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-bd0808b13b1a444fae9ed06eaf2f2f5c2022-12-22T03:58:35ZengMDPI AGMaterials1996-19442019-11-011221363210.3390/ma12213632ma12213632Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice SpinneretPaola Bernardo0Franco Tasselli1Giovanni Chiappetta2Gabriele Clarizia3Institute on Membrane Technology, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87036 Rende (CS), ItalyInstitute on Membrane Technology, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87036 Rende (CS), ItalyInstitute on Membrane Technology, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87036 Rende (CS), ItalyInstitute on Membrane Technology, ITM-CNR, c/o University of Calabria, Via P. Bucci 17/C, 87036 Rende (CS), ItalyHollow fibers (HFs) are widely applied in different membrane operations, particularly in gas separation. The present work investigates the effect of post-spinning treatment on the gas transport properties of polyimide-based HFs. The membranes were spun by using both a conventional spinneret and a triple-orifice spinneret. A systematic analysis was carried out by considering different alcohols as the first fluid for the solvent exchange, with or without <i>n</i>−hexane as a second fluid. The HFs were characterized by exploring the change of the morphology and the permselective properties as a consequence of the operation conditions for spinning and post-treatments. According to the morphology, for a specific hollow fiber type, an optimal post−treatment was identified. The HFs prepared with the triple-orifice spinneret, using a solvent−rich shell fluid, can take advantage of the post-treatment using larger alcohols, while smaller alcohols should be preferred for the conventional spun HFs that present inside−outside double skin layers.https://www.mdpi.com/1996-1944/12/21/3632hollow fiber membranestriple spinneretsolvent–exchangegas separationpolyimide |
| spellingShingle | Paola Bernardo Franco Tasselli Giovanni Chiappetta Gabriele Clarizia Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret Materials hollow fiber membranes triple spinneret solvent–exchange gas separation polyimide |
| title | Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret |
| title_full | Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret |
| title_fullStr | Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret |
| title_full_unstemmed | Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret |
| title_short | Effect of the Post-Spinning Solvent Exchange on the Performance of Asymmetric, Polyimide Hollow Fibers Prepared by Using a Triple-Orifice Spinneret |
| title_sort | effect of the post spinning solvent exchange on the performance of asymmetric polyimide hollow fibers prepared by using a triple orifice spinneret |
| topic | hollow fiber membranes triple spinneret solvent–exchange gas separation polyimide |
| url | https://www.mdpi.com/1996-1944/12/21/3632 |
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