Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity
Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organi...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2025-01-01
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| Series: | Advanced Membranes |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S277282342400023X |
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| author | Yanqing Xu Jiaqi Xiong Chenfei Lin Yixiang Yu Qite Qiu Junbin Liao Huimin Ruan Arcadio Sotto Jiangnan Shen |
| author_facet | Yanqing Xu Jiaqi Xiong Chenfei Lin Yixiang Yu Qite Qiu Junbin Liao Huimin Ruan Arcadio Sotto Jiangnan Shen |
| author_sort | Yanqing Xu |
| collection | DOAJ |
| description | Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations. |
| format | Article |
| id | doaj-art-a39c663ee5a74370bcf9c0a50b29ea76 |
| institution | Kabale University |
| issn | 2772-8234 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Advanced Membranes |
| spelling | doaj-art-a39c663ee5a74370bcf9c0a50b29ea762025-01-20T04:18:05ZengKeAi Communications Co. Ltd.Advanced Membranes2772-82342025-01-015100112Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivityYanqing Xu0Jiaqi Xiong1Chenfei Lin2Yixiang Yu3Qite Qiu4Junbin Liao5Huimin Ruan6Arcadio Sotto7Jiangnan Shen8College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China; Corresponding author.College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, ChinaDepartment of Science Education. Rey Juan Carlos University, Madrid, 28942, SpainCollege of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China; Corresponding author.Uniform pore size is essential for molecular sieving in separation membranes. Traditional nanofiltration (NF) polymer membranes struggle with precise structure control due to random chain packing and rapid cross-linking, leading to varied pore sizes and poor molecular discrimination. Covalent organic frameworks (COFs) offer ordered porous structures for enhanced molecular selectivity. We synthesized composite COFs membranes with triphenylamine derivatives through interfacial polymerization, adjusting pore channel functional groups to achieve high water permeance and size-selective molecule retention. The TFB-OMe-TAPA COFs membrane demonstrated sharp rejection profiles, separating solutes of different molecular sizes. A three-stage cascade process was used to fractionate binary molecules with varying charges, achieving a separation factor of 26.7 for heterogeneous charge molecules. This work reveals the selectivity of COF membranes in near-molecular-weight systems, expanding their potential in molecular separations.http://www.sciencedirect.com/science/article/pii/S277282342400023XCovalent organic frameworks (COFs)NanofiltrationMolecular selectivity |
| spellingShingle | Yanqing Xu Jiaqi Xiong Chenfei Lin Yixiang Yu Qite Qiu Junbin Liao Huimin Ruan Arcadio Sotto Jiangnan Shen Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity Advanced Membranes Covalent organic frameworks (COFs) Nanofiltration Molecular selectivity |
| title | Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity |
| title_full | Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity |
| title_fullStr | Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity |
| title_full_unstemmed | Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity |
| title_short | Robust methoxy-based covalent organic frameworks membranes enable efficient near-molecular-weight selectivity |
| title_sort | robust methoxy based covalent organic frameworks membranes enable efficient near molecular weight selectivity |
| topic | Covalent organic frameworks (COFs) Nanofiltration Molecular selectivity |
| url | http://www.sciencedirect.com/science/article/pii/S277282342400023X |
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