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: Yanqing Xu, Jiaqi Xiong, Chenfei Lin, Yixiang Yu, Qite Qiu, Junbin Liao, Huimin Ruan, Arcadio Sotto, Jiangnan Shen
Format: Article
Language:English
Published: KeAi Communications Co. Ltd. 2025-01-01
Series:Advanced Membranes
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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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AT yixiangyu robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity
AT qiteqiu robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity
AT junbinliao robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity
AT huiminruan robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity
AT arcadiosotto robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity
AT jiangnanshen robustmethoxybasedcovalentorganicframeworksmembranesenableefficientnearmolecularweightselectivity