An asymmetric super-wetting Janus PVDF oil-water separation membrane fabricated by a simple method on a non-woven substrate

IF 4.5 3区工程技术 Q1 CHEMISTRY, APPLIED

Reactive & Functional Polymers Pub Date : 2024-06-10 DOI:10.1016/j.reactfunctpolym.2024.105982

Jikui Wang, Yuwei Feng, Yicheng Huang, Xinquan Zou, Yi Zhang, Wenxiu Liu, Kun Wang

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引用次数: 0

Abstract

Membrane separation technology is an important method of treating oily wastewater with great potential for development. However, preparation of membranes for efficiently separating complex oil-water mixtures continues to be challenging. In this study, a strategy for efficient construction of asymmetric wetting surfaces was designed, and successfully prepared an asymmetric super wetting Janus polyvinylidene fluoride (PVDF) modified separation membrane to separate complex oil-water emulsion. The composite PVDF membrane was prepared using a non-woven fabric substrate and phase conversion method. Subsequently, composite membrane was rapidly hydrophilic modified on one side using tannic acid and 3-aminopropyltriethoxysilane under the strong oxidizing effect of oxidant sodium periodate. Then non-woven fabric substrate was peeled off to obtain a Janus PVDF modified separation membrane. The front and back sides of the separation membrane have highly asymmetric micromorphology and wettability. The front side has hydrophilic/underwater oleophobic wettability (with a water contact angle of 31°). The separation efficiency of oil-in-water emulsion is up to 99.5%, while the back side has super lipophilic/underoil hydrophobic wettability (with a water contact angle of 131°). The separation efficiency of water-in-oil emulsion is up to 98.6%, improving the efficiency of oil in water separation and application range.

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用简单方法在无纺基材上制造出非对称超润湿 Janus PVDF 油水分离膜

膜分离技术是处理含油废水的一种重要方法，具有巨大的发展潜力。然而，高效分离复杂油水混合物的膜制备仍然具有挑战性。本研究设计了一种高效构建非对称润湿表面的策略，并成功制备了一种非对称超润湿 Janus 聚偏氟乙烯（PVDF）改性分离膜，用于分离复杂的油水乳化液。该复合 PVDF 膜采用无纺布基底和相转化法制备。随后，在氧化剂高碘酸钠的强氧化作用下，使用单宁酸和 3-aminopropyltriethoxysilane 对复合膜进行单面快速亲水改性。然后剥离无纺布基材，得到 Janus PVDF 改性分离膜。分离膜的正反两面具有高度不对称的微观形貌和润湿性。正面具有亲水/水下疏油润湿性（水接触角为 31°）。水包油乳液的分离效率高达 99.5%，而背面则具有超亲油/水下疏油润湿性（水接触角为 131°）。油包水型乳液的分离效率高达 98.6%，提高了水包油的分离效率和应用范围。

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

Reactive & Functional Polymers 工程技术-高分子科学

CiteScore

8.90

自引率

5.90%

发文量

259

审稿时长

27 days

期刊介绍： Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.