Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow
The conventional fabrication of isoporous membranes via the evaporation-induced self-assembly of block copolymers in combination with non-solvent induced phase separation (SNIPS) is achieved under certain environmental conditions. In this study, we report a modification in the conventional fabricati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-04-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/10/5/83 |
| _version_ | 1827717850901512192 |
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| author | Kirti Sankhala Joachim Koll Volker Abetz |
| author_facet | Kirti Sankhala Joachim Koll Volker Abetz |
| author_sort | Kirti Sankhala |
| collection | DOAJ |
| description | The conventional fabrication of isoporous membranes via the evaporation-induced self-assembly of block copolymers in combination with non-solvent induced phase separation (SNIPS) is achieved under certain environmental conditions. In this study, we report a modification in the conventional fabrication process of (isoporous) flat sheet membranes in which the self-assembly of block copolymers is achieved by providing controlled evaporation conditions using gas flow and the process is introduced as gSNIPS. This fabrication approach can not only trigger and control the microphase separation but also provides isoporous structure formation in a much broader range of solution concentrations and casting parameters, as compared to fabrication under ambient, uncontrolled conditions. We systematically investigated the structure formation of the fabrication of integral asymmetric isoporous membranes by gSNIPS. A quantitative correlation between the evaporation conditions (causing solvent evaporation and temperature drop) and the self-assembly of block copolymers beginning from the top layer up to a certain depth, orientation of pores in the top layer and the substructure morphology has been discussed empirically. |
| first_indexed | 2024-03-10T20:11:10Z |
| format | Article |
| id | doaj.art-283905fbf2da4052b59303abd79f1d2f |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T20:11:10Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-283905fbf2da4052b59303abd79f1d2f2023-11-19T22:55:24ZengMDPI AGMembranes2077-03752020-04-011058310.3390/membranes10050083Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas FlowKirti Sankhala0Joachim Koll1Volker Abetz2Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, GermanyHelmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, GermanyHelmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Strasse 1, 21502 Geesthacht, GermanyThe conventional fabrication of isoporous membranes via the evaporation-induced self-assembly of block copolymers in combination with non-solvent induced phase separation (SNIPS) is achieved under certain environmental conditions. In this study, we report a modification in the conventional fabrication process of (isoporous) flat sheet membranes in which the self-assembly of block copolymers is achieved by providing controlled evaporation conditions using gas flow and the process is introduced as gSNIPS. This fabrication approach can not only trigger and control the microphase separation but also provides isoporous structure formation in a much broader range of solution concentrations and casting parameters, as compared to fabrication under ambient, uncontrolled conditions. We systematically investigated the structure formation of the fabrication of integral asymmetric isoporous membranes by gSNIPS. A quantitative correlation between the evaporation conditions (causing solvent evaporation and temperature drop) and the self-assembly of block copolymers beginning from the top layer up to a certain depth, orientation of pores in the top layer and the substructure morphology has been discussed empirically.https://www.mdpi.com/2077-0375/10/5/83isoporous membranesPS-<i>b</i>-P4VP diblock copolymergas flowevaporation-induced self-assemblygSNIPSSNIPS |
| spellingShingle | Kirti Sankhala Joachim Koll Volker Abetz Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow Membranes isoporous membranes PS-<i>b</i>-P4VP diblock copolymer gas flow evaporation-induced self-assembly gSNIPS SNIPS |
| title | Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow |
| title_full | Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow |
| title_fullStr | Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow |
| title_full_unstemmed | Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow |
| title_short | Facilitated Structure Formation in Isoporous Block Copolymer Membranes upon Controlled Evaporation by Gas Flow |
| title_sort | facilitated structure formation in isoporous block copolymer membranes upon controlled evaporation by gas flow |
| topic | isoporous membranes PS-<i>b</i>-P4VP diblock copolymer gas flow evaporation-induced self-assembly gSNIPS SNIPS |
| url | https://www.mdpi.com/2077-0375/10/5/83 |
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