A pH-responsive smart surface for the continuous separation of oil/water/oil ternary mixtures
A pH-responsive smart surface for the continuous separation of oil/water/oil ternary mixtures
复制标题
用于连续分离油/水/油三元混合物的 pH 响应型智能表面
DOI：
10.1038/am.2014.44
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发表时间：
2014-07-01
影响因子：
9.7
通讯作者：
Shi, Feng
中科院分区：
文献类型：
--
作者：
Ju, Guannan;Cheng, Mengjiao;Shi, Feng
为了应对日益增多的溢油事故，人们提出了许多策略来清理溢油或分离水/油混合物。特别是，超亲水/水下超疏油智能材料最近显示出优势，在克服问题的油阻塞和水障碍，在传统的油/水分离过程中的富油混合物与超疏水/超亲油材料。然而，据我们所知，没有先前的报告详细的智能材料具有超疏水/超亲油的润湿性能，可以应用于油/水/油三元混合物的连续原位分离，这在实际的溢油情况下是常见的。在此，我们描述了一种pH响应智能装置的制造和功效，该装置用于连续原位分离这种油/水/油三元混合物，而不需要非原位处理。在空气中，装置的超疏水/超亲油表面允许二氯甲烷渗透，同时防止水通过。碱处理后器械表面的超亲水性/水下超疏油性防止己烷通过，同时允许水渗透器械。
To handle the serious issue of increasing oil spill accidents, many strategies have been proposed to either clean spilt oil or separate water/oil mixture. Especially, superhydrophilic/underwater superoleophobic smart materials have recently shown advantages in overcoming problems of oil blocking and water barriers during conventional oil/water-separating process of oil-rich mixtures with superhydrophobic/superoleophilic materials. However, to the best of our knowledge, no prior reports have detailed smart materials with the wetting properties of superhydrophobic/superoleophilic that can be applied in continuous in situ separations of oil/water/oil ternary mixtures, which are common in practical oil spill cases. Herein, we describe the fabrication and efficacy of a pH-responsive smart device for continuous in situ separations of such oil/water/oil ternary mixtures without the need for ex situ treatments. In air, the superhydrophobic/superoleophilic surface of the device allowed dichloromethane to permeate through while preventing water from passing. The superhydrophilicity/underwater superoleophobicity of the device surface following alkaline treatments prevented the passage of hexane while allowing water to penetrate the device.