Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination
Abstract Aqueous two-phase system features with ultralow interfacial tension and thick interfacial region, affording unique confined space for membrane assembly. Here, for the first time, an aqueous two-phase interfacial assembly method is proposed to fabricate covalent organic framework (COF) membr...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2022-11-01
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| Series: | Nano-Micro Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40820-022-00968-5 |
| _version_ | 1797988458180902912 |
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| author | Hongjian Wang Jiashuai Zhao Yang Li Yu Cao Ziting Zhu Meidi Wang Runnan Zhang Fusheng Pan Zhongyi Jiang |
| author_facet | Hongjian Wang Jiashuai Zhao Yang Li Yu Cao Ziting Zhu Meidi Wang Runnan Zhang Fusheng Pan Zhongyi Jiang |
| author_sort | Hongjian Wang |
| collection | DOAJ |
| description | Abstract Aqueous two-phase system features with ultralow interfacial tension and thick interfacial region, affording unique confined space for membrane assembly. Here, for the first time, an aqueous two-phase interfacial assembly method is proposed to fabricate covalent organic framework (COF) membranes. The aqueous solution containing polyethylene glycol and dextran undergoes segregated phase separation into two water-rich phases. By respectively distributing aldehyde and amine monomers into two aqueous phases, a series of COF membranes are fabricated at water–water interface. The resultant membranes exhibit high NaCl rejection of 93.0–93.6% and water permeance reaching 1.7–3.7 L m−2 h−1 bar−1, superior to most water desalination membranes. Interestingly, the interfacial tension is found to have pronounced effect on membrane structures. The appropriate interfacial tension range (0.1–1.0 mN m−1) leads to the tight and intact COF membranes. Furthermore, the method is extended to the fabrication of other COF and metal–organic polymer membranes. This work is the first exploitation of fabricating membranes in all-aqueous system, confering a green and generic method for advanced membrane manufacturing. |
| first_indexed | 2024-04-11T08:04:21Z |
| format | Article |
| id | doaj.art-00fd7d597720499683a84816d466b230 |
| institution | Directory Open Access Journal |
| issn | 2311-6706 2150-5551 |
| language | English |
| last_indexed | 2024-04-11T08:04:21Z |
| publishDate | 2022-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nano-Micro Letters |
| spelling | doaj.art-00fd7d597720499683a84816d466b2302022-12-22T04:35:36ZengSpringerOpenNano-Micro Letters2311-67062150-55512022-11-0114111410.1007/s40820-022-00968-5Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water DesalinationHongjian Wang0Jiashuai Zhao1Yang Li2Yu Cao3Ziting Zhu4Meidi Wang5Runnan Zhang6Fusheng Pan7Zhongyi Jiang8Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityDepartment of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityKey Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin UniversityAbstract Aqueous two-phase system features with ultralow interfacial tension and thick interfacial region, affording unique confined space for membrane assembly. Here, for the first time, an aqueous two-phase interfacial assembly method is proposed to fabricate covalent organic framework (COF) membranes. The aqueous solution containing polyethylene glycol and dextran undergoes segregated phase separation into two water-rich phases. By respectively distributing aldehyde and amine monomers into two aqueous phases, a series of COF membranes are fabricated at water–water interface. The resultant membranes exhibit high NaCl rejection of 93.0–93.6% and water permeance reaching 1.7–3.7 L m−2 h−1 bar−1, superior to most water desalination membranes. Interestingly, the interfacial tension is found to have pronounced effect on membrane structures. The appropriate interfacial tension range (0.1–1.0 mN m−1) leads to the tight and intact COF membranes. Furthermore, the method is extended to the fabrication of other COF and metal–organic polymer membranes. This work is the first exploitation of fabricating membranes in all-aqueous system, confering a green and generic method for advanced membrane manufacturing.https://doi.org/10.1007/s40820-022-00968-5Covalent organic framework membranesAqueous two-phaseInterfacial polymerizationMolecular separationWater desalination |
| spellingShingle | Hongjian Wang Jiashuai Zhao Yang Li Yu Cao Ziting Zhu Meidi Wang Runnan Zhang Fusheng Pan Zhongyi Jiang Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination Nano-Micro Letters Covalent organic framework membranes Aqueous two-phase Interfacial polymerization Molecular separation Water desalination |
| title | Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination |
| title_full | Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination |
| title_fullStr | Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination |
| title_full_unstemmed | Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination |
| title_short | Aqueous Two-Phase Interfacial Assembly of COF Membranes for Water Desalination |
| title_sort | aqueous two phase interfacial assembly of cof membranes for water desalination |
| topic | Covalent organic framework membranes Aqueous two-phase Interfacial polymerization Molecular separation Water desalination |
| url | https://doi.org/10.1007/s40820-022-00968-5 |
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