School of Marine Science and Technology, State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), Harbin Institute of Technology, Weihai 264209, P. R. China.
Shandong Sino-European Membrane Technology Research Institute Co., Ltd., Weihai Key Laboratory of Water Treatment and Membrane Technology, Weihai 264209, P. R. China.
ACS Nano. 2022 Mar 22;16(3):4684-4692. doi: 10.1021/acsnano.1c11388. Epub 2022 Mar 2.
Oil leakage is a global environmental issue and happens frequently, resulting in a waste of oil resources and even threatening the safety of marine creatures and humans. Because of unidirectional oil transportation performance, "oil-diode" Janus membranes have attracted lots of attention for oil/water separation. However, the hydrophobic side of traditional "oil-diode" Janus membrane is completely hydrophobic, resulting in an easy permeation of oil, which hampers light oil recycling. Herein, we provide a facile approach to develop "oil-diode" Janus membranes with the special wettable structure for fast oil refining. The material characteristics and surface wettability of the membranes that generate superimposed efforts are vital to fabricate "oil-diode" Janus membranes. Interestingly, the manufactured membranes exhibit extra-high oil intrusion pressure up to 12 kPa and present high permeance of about 2993 L m h bar in separating stable water-in-oil emulsion containing surfactant and separation efficiency up to 99.6%, thereby showing promising potential in oil recovery and refining.
漏油是一个全球性的环境问题，经常发生，导致石油资源浪费，甚至威胁到海洋生物和人类的安全。由于具有单向输油性能，“油-二极管”Janus 膜因其在油水分离方面的优异性能而备受关注。然而，传统“油-二极管”Janus 膜的疏油侧完全疏水，导致油容易渗透，从而阻碍了轻质油的回收。在此，我们提供了一种简便的方法来开发具有特殊润湿性结构的“油-二极管”Janus 膜，以实现快速炼油。对产生叠加效果的膜的材料特性和表面润湿性的要求很高，这对于制造“油-二极管”Janus 膜至关重要。有趣的是，所制备的膜表现出高达 12kPa 的超高油渗透压力和约 2993L m h bar 的高渗透性，用于分离含有表面活性剂的稳定的油包水乳状液，分离效率高达 99.6%，因此在采油和炼油方面具有广阔的应用前景。
