通过具有所需表面润湿性的多孔陶瓷膜进行重力驱动的油水混合物分离

Ren Chunlei, Chen Wufeng, Chen Chusheng, Winnubst Louis, Yan Lifeng

School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China.

Inorganic Membranes, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands.

Materials (Basel). 2021 Jan 19;14(2):457. doi: 10.3390/ma14020457.

Porous AlO membranes were prepared through a phase-inversion tape casting/sintering method. The alumina membranes were embedded with finger-like pores perpendicular to the membrane surface. Bare alumina membranes are naturally hydrophilic and underwater oleophobic, while fluoroalkylsilane (FAS)-grafted membranes are hydrophobic and oleophilic. The coupling of FAS molecules on alumina surfaces was confirmed by Thermogravimetric Analysis and X-ray Photoelectron Spectroscopy measurements. The hydrophobic membranes exhibited desired thermal stability and were super durable when exposed to air. Both membranes can be used for gravity-driven oil/water separation, which is highly cost-effective. The as-calculated separation efficiency () was above 99% for the FAS-grafted alumina membrane. Due to the excellent oil/water separation performance and good chemical stability, the porous ceramic membranes display potential for practical applications.

通过相转化流延成型/烧结法制备了多孔AlO膜。氧化铝膜中嵌入了垂直于膜表面的指状孔。裸露的氧化铝膜天然亲水且水下疏油，而氟代烷基硅烷（FAS）接枝的膜则疏水且亲油。通过热重分析和X射线光电子能谱测量证实了FAS分子在氧化铝表面的偶联。疏水膜表现出所需的热稳定性，暴露于空气中时具有超强的耐久性。两种膜均可用于重力驱动的油/水分离，具有很高的成本效益。计算得出的FAS接枝氧化铝膜的分离效率（）高于99%。由于优异的油/水分离性能和良好的化学稳定性，多孔陶瓷膜具有实际应用潜力。