发酵衍生纤维素和再生聚苯乙烯的分级两亲高效油水分离膜,Journal of Applied Polymer Science

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发酵衍生纤维素和再生聚苯乙烯的分级两亲高效油水分离膜
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2020-10-29 , DOI: 10.1002/app.50123
Siju Cherikkattil Raghavan ₁ , Anju PV ₁ , Mudrika Khandelwal ₁

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通过使用特殊设计的两亲性多孔膜可以实现油和水的高效分离。但是，这种膜的制备通常涉及复杂的多步化学过程。在本文中，我们报告了一种两亲性复合膜（聚苯乙烯[PS] /细菌纤维素[BC]膜），该膜由疏水性回收PS和亲水性BC组成，通过简便的原位发酵工艺制成。这些膜不仅表现出对比性的润湿性，而且还包含由微纤维和纳米纤维组成的分层网络，这使其成为油水分离的理想选择。通过傅立叶变换红外光谱和扫描电镜分别研究了制成的BC，回收的PS膜和PS / BC复合膜的结构和形态特性。通过使用水-己烷乳液作为进料来测试膜分离油和水的能力，并通过光学显微镜和UV-Vis光谱对收集的滤液进行表征。PS膜无法分离油和水，而PS / BC膜则有效地将水与乳液分离。PS / BC复合膜的水回收率高达90％以上，而BC仅达到57％。讨论了每个膜的油水分离机理。还证明了PS / BC复合膜的可重复使用性。而PS / BC膜则有效地从乳液中分离出水。PS / BC复合膜的水回收率高达90％以上，而BC仅达到57％。讨论了每个膜的油水分离机理。还证明了PS / BC复合膜的可重复使用性。而PS / BC膜则有效地从乳液中分离出水。PS / BC复合膜的水回收率高达90％以上，而BC仅达到57％。讨论了每个膜的油水分离机理。还证明了PS / BC复合膜的可重复使用性。

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Hierarchical amphiphilic high‐efficiency oil–water separation membranes from fermentation derived cellulose and recycled polystyrene

A high‐efficiency separation of oil and water can be achieved by using specially designed amphiphilic porous membrane. However, the preparation of such membranes often involves complex multistep chemical processes. Herein, we report an amphiphilic composite membrane (polystyrene [PS]/bacterial cellulose [BC] membrane) consisting of hydrophobic recycled PS and hydrophilic BC, fabricated by a facile in situ fermentation process. Not only these membranes exhibit a combination of contrasting wettability but also comprise of a hierarchical network of microfibers and nanofibers, which makes them ideal for oil–water separation. The structural and morphological properties of as‐produced BC, recycled PS membrane, and PS/BC composite membrane were studied by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The ability of the membranes to separate oil and water was tested by using an emulsion of hexane‐in‐water as the feed and the collected filtrates were characterized by optical microscopy and UV–Vis spectroscopy. PS membranes were unable to separate oil and water, while the PS/BC membrane efficiently separated water from the emulsion. PS/BC composite membranes showed a high water recovery of more than 90%, against only 57% recovery shown by BC. Mechanisms of oil–water separation for each membrane are discussed. The reusability of the PS/BC composite membrane was also demonstrated.

更新日期：2020-12-22

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