COF membranes with fast and selective of water‐transport channels for efficient ethanol dehydration

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-06-04 DOI:10.1002/aic.18921

Tianpei Yi, Yutong Wang, Fusheng Pan, Jiashuai Zhao, Ziting Zhu, Yuhan Wang, Hongjian Wang, Junyi Zhao, Zhongyi Jiang

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引用次数: 0

Abstract

Laminar‐structured covalent organic framework (COF) membranes hold great promise in molecular separation. Precise nanochannel manipulation of laminar‐structured COF membranes is of critical significance. In this study, COF membranes are engineered by assembling COF‐TbTG nanosheets and sulfobutylether‐β‐cyclodextrin (SCD) into laminar structures. The interlamellar spaces of COFs are regulated to achieve molecular sieving for precise separation; the intrinsic pores of COFs are utilized as fast molecule‐transport channels. The obtained COF membranes exhibit a superior ethanol dehydration performance with a permeation flux of 5.2 kg m−2 h−1 and a separation factor of 1072, which exceeds the performances of state‐of‐the‐art membranes for water/ethanol separation. Moreover, the optimal membranes show a steady permeation flux maintaining around 5.0 kg m−2 h−1 during a 72‐h operation test. This work may provide a new approach to the design of molecular‐sieving COF membranes for precise separation.

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具有快速和选择性的水运输通道的COF膜，用于有效的乙醇脱水

层流结构共价有机框架膜（COF）在分子分离领域具有广阔的应用前景。纳米通道的精确操作是层状结构COF膜的关键意义。在这项研究中，COF膜是通过将COF - TbTG纳米片和磺基丁醚- β -环糊精（SCD）组装成层状结构来设计的。调节COFs的层间空间，实现分子筛分，实现精确分离；COFs的固有孔隙被用作快速分子运输通道。所制得的COF膜具有良好的乙醇脱水性能，渗透通量为5.2 kg m−2 h−1，分离系数为1072，超过了现有膜的水/乙醇分离性能。此外，在72小时的运行测试中，最佳膜表现出稳定的渗透通量，保持在5.0 kg m−2 h−1左右。本研究为分子筛COF膜的精确分离提供了一种新的设计思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.