A Superhydrophobic Trifluoromethyl‐Containing Covalent Organic Framework Membrane for Efficient Oil/Water Separation
Jia‐Qi Chu, Ya Lu, Shi‐Xian Gan, Qiao‐Yan Qi, Chao Jia, Jin Yao, Xin Zhao
Abstract
Abstract Oily water caused in the process of industry leads to not only the waste of resources, but also environmental pollution. Membrane separation, as a facile and efficient separation technology, has attracted widespread attention in the field of oil/water separation. The development of membrane materials with high separation performance is one of the key elements to improve separation efficiency. In this work, a superhydrophobic membrane composited with a trifluoromethyl‐containing covalent organic framework (COF) is prepared, which exhibits excellent performance on separations of oil/water mixtures and water‐in‐oil emulsions. For different composition of oil/water mixtures, the highest flux of oil is up to 32 000 L m −2 h −1 and oil/water separation efficiency is above 99%. Moreover, the high oil/water separation efficiency remains unchanged after successive cycles. This work provides a feasible scheme for the design of high‐efficiency oil/water separation membranes.