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A Facile and Effective Method to Fabricate Superhydrophobic/Superoeophilic Surface for the Separation of Both Water/Oil Mixtures and Water-in-Oil Emulsions

机译:一种用于分离水/油混合物和油包水乳液的超疏水/超亲油表面的简便有效方法

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摘要

Superhydrophobic/superoleophilic surfaces (water contact angle greater than 150° with low hysteresis, with an oil contact angle smaller than 5°) have a wide-range of applications in oil/water separation. However, most of the essential methods to fabricate this kind of surface are complex, inflexible, and costly. Moreover, most methods focus on separating immiscible oil and water mixtures but lack the ability to demulsify surfactant-stabilized emulsions, which is widely present in industry and daily life. In this study, a facile and effective method was developed to fabricate superhydrophobic/superoleophilic surfaces that can be easily applied on almost all kinds of solid substrates. The treated porous substrates (e.g., steel mesh; cotton) can separate oil/water mixtures or absorb oil from a mixture. Furthermore, the compressed treated cotton is capable of demulsifying stabilized water-in-oil emulsions with high efficiency. The simple, low-cost, and material-unrestricted method provides an efficient way to separate oil/water mixtures of various kinds and has great potential in energy conservation and environmental protection.
机译:超疏水/超亲油性表面(水接触角大于150°,低滞后,油接触角小于5°)在油/水分离中具有广泛的应用。但是,制造这种表面的大多数基本方法都是复杂,不灵活且昂贵的。而且,大多数方法集中于分离不混溶的油和水的混合物,但是缺乏使表面活性剂稳定的乳液破乳的能力,这在工业和日常生活中广泛存在。在这项研究中,开发了一种简便有效的方法来制造超疏水/超亲油性表面,该表面可以轻松应用于几乎所有种类的固体基材上。经处理的多孔基材(例如,钢网;棉)可以分离油/水混合物或从混合物中吸收油。此外,经压缩处理的棉能够高效地使稳定的油包水型乳液破乳。简单,低成本且不受材料限制的方法提供了一种分离各种油/水混合物的有效方法,在节能和环境保护方面具有巨大潜力。

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