Flexible, Durable, and Unconditioned Superoleophobic/Superhydrophilic Surfaces for Controllable Transport and Oil–Water Separation,Advanced Functional Materials

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Flexible, Durable, and Unconditioned Superoleophobic/Superhydrophilic Surfaces for Controllable Transport and Oil–Water Separation
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2018-03-08 , DOI: 10.1002/adfm.201706867
Feiran Li ₁ , Ziran Wang ₁ , Suichu Huang ₁ , Yunlu Pan ₁ , Xuezeng Zhao ₁

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Superoleophobic/superhydrophilic surfaces have incomparable advantages for oil–water separation and oil droplet manipulation; however, such surfaces are difficult to obtain on the basis of surface tension theory, and existing attempts are either not fully functional or are nondurable. Here, a solution to achieve the combination of superoleophobicity and superhydrophilicity by emphasizing the polar component of surface tension is proposed. The developed surfaces can be flexibly applied to almost any solid substrate and exhibit superoleophobic and instantaneous superhydrophilic property. The surfaces applied to certain substrates can be used for controllable oil transport, oil–water separation, and emulsion demulsification. Furthermore, a novel ferroconcrete‐like structure to substantially increase the durability of the developed surfaces without affecting the superwettability is developed. The coated steel meshes preserve the ability of the material to separate oil–water mixtures even after over 400 m abrasion, which can be a significant step toward its widespread application.

中文翻译：

灵活，耐用且无条件的超疏油/超亲水表面，可控制运输和油水分离

超疏油/超亲水表面在油水分离和油滴处理方面具有无可比拟的优势。然而，基于表面张力理论难以获得这样的表面，并且现有的尝试或者不能完全起作用或者是不耐用的。在此，提出了通过强调表面张力的极性成分来实现超疏油性和超亲水性的组合的解决方案。显影后的表面可以灵活地应用到几乎任何固体基质上，并具有超疏油和瞬时超亲水性。涂在某些基材上的表面可用于可控的油运输，油水分离和乳化破乳。此外，开发了一种新颖的类似钢筋混凝土的结构，可在不影响超润湿性的情况下显着提高已开发表面的耐久性。即使在超过400 m的磨损之后，带涂层的钢网仍保留了材料分离油水混合物的能力，这可能是其广泛应用的重要一步。

更新日期：2018-03-08

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