共价有机骨架功能化智能膜具有液下双重超疏水性,可有效分离油/水乳液。

IF 8.2 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Science of the Total Environment Pub Date : 2023-12-15 Epub Date: 2023-09-06 DOI:10.1016/j.scitotenv.2023.166895
Yaqi Zhang, Shiwei Tian, Qiankun Sha, Jinjie Lv, Na Han, Xingxiang Zhang
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引用次数: 1

摘要

具有液下双重超疏水性的智能膜,仅需简单的液体预润湿即可实现油/水乳液的按需分离,对处理复杂的真实油/水系统具有重要价值。在这里,我们首先制备了亚胺连接的共价有机骨架纳米球(TPB-DMTP-COF)的稳定悬浮液,随后通过将聚丙烯腈基(PAN基)膜浸入TPB-DMTP-COF纳米球悬浮液中,制备了具有液下双重超疏水性的COF功能化智能膜。因此,通过采用预润湿工艺(水下油接触角和油下水接触角均超过150°),可以实现TPB-DMTP-COF/PAN膜对水包油和水包油乳液的有效可切换分离。具体而言,表面活性剂稳定的水包油乳液和油包水乳液的分离通量和分离效率分别高于1200L/m2.h和98.0%,以及2100L/m2.h和97.4%。此外,液体中的超低粘附性有助于所制备的TPB-DMTP-COF/PAN膜具有优异的可重复使用性和防污性。该工作为制备具有液下双重超疏水性的智能膜处理含油废水提供了一种可行的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Covalent organic framework functionalized smart membranes with under-liquid dual superlyophobicity for efficient separation of oil/water emulsions.

The smart membrane with under-liquid dual superlyophobicity, which can achieve on-demand separation of oil/water emulsions only by simple liquid pre-wetting, is of essential value for the treatment of complicated real oil/water systems. Here, we first fabricated a stable suspension of imine-linked covalent organic framework nanospheres (TPB-DMTP-COF), and subsequently fabricated COF functionalized smart membranes with under-liquid dual superlyophobicity by immersing polyacrylonitrile-based (PAN-based) membranes into TPB-DMTP-COF nanosphere suspension. Accordingly, effective switchable separation of both oil-in-water and water-in-oil emulsions by TPB-DMTP-COF/PAN membranes can be achieved by employing pre-wetting processes (both the oil contact angle under water and the water contact angle under oil are over 150°). Specifically, the separation flux and the separation efficiency are higher than 1200 L/m2‧h and 98.0 %, and 2100 L/m2‧h and 97.4 % for the surfactant-stabilized oil-in-water and water-in-oil emulsions, respectively. Furthermore, the ultralow adhesions in liquid contributed to the outstanding reusability and antifouling resistance of the prepared TPB-DMTP-COF/PAN membranes. This work provides a feasible approach for fabricating a smart membrane with under-liquid dual superlyophobicity for oily wastewater treatment.

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来源期刊
Science of the Total Environment
Science of the Total Environment 环境科学-环境科学
CiteScore
17.60
自引率
10.20%
发文量
8726
审稿时长
2.4 months
期刊介绍: The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.
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