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。
