Sodium alginate/poly(vinyl alcohol)/graphitic carbon nitride composite membrane with excellent anti-fouling properties for efficient oil-water separation

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2025-05-20 DOI:10.1016/j.porgcoat.2025.109352

Jieyu Wan , Wenjie Wu , Yanqin Wang , Weijia Zhou , Jun Shao , Changfeng Wan , Haoqing Hou

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引用次数: 0

Abstract

The oil spills and organic wastewater is a kind of environmental pollution which attracts widely concern. Membrane separation is a potential technology to settle these wastewaters. However, the high cost, the weak antifouling property, and the less functionality of the separation materials limit their promotion. In this work, the sodium alginate/polyvinyl alcohol/graphite-phase carbon nitride (PVA@SA@CN) hydrogel composite membranes were coated on the stainless steel mesh, and the double-network composite membrane was constructed. Results indicated that the PVA@SA@CN composite membrane is superhydrophilic/underwater superhydrophobic, and this composite presents excellent anti-fouling property. Oil-water separation experiments indicated that the separation efficiency was higher than 99 % even constitutively separated for 50 times, and the highest flux reached to 4.5 × 10³ L·m⁻²·h⁻¹. In addition, the PVA@SA@CN composite membrane also presented exceptional self-cleaning ability. This research provides a new approach to the field of continuous oil-water separation.

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海藻酸钠/聚乙烯醇/石墨氮化碳复合膜具有优异的防污性能，可实现高效油水分离

石油泄漏和有机废水是一种受到广泛关注的环境污染。膜分离技术是一种很有潜力的污水处理技术。但分离材料成本高、防污性能弱、功能性低等缺点限制了其推广。本研究将海藻酸钠/聚乙烯醇/石墨相氮化碳（PVA@SA@CN）水凝胶复合膜涂覆在不锈钢网上，构建了双层网状复合膜。结果表明，PVA@SA@CN复合膜具有超亲水性/水下超疏水性，具有优异的防污性能。油水分离实验表明，即使本质分离50次，分离效率仍高于99%，最高通量达到4.5 × 103 L·m−2·h−1。此外，PVA@SA@CN复合膜还表现出优异的自清洁能力。该研究为油水连续分离领域开辟了一条新途径。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.