High-flux whisker layer ceramic membrane prepared by gel spin-coating method for low-pressure oil/water emulsion filtration |
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| Affiliation: | 1. Departamento de Física de la Materia Condensada, Universidad de Sevilla, 41080, Sevilla, Spain;2. Departamento de Ingeniería Mecánica, Energética y de los Materiales, Universidad de Extremadura, 06006, Badajoz, Spain;1. School of Materials Science and Engineering, Shenyang Ligong University, Shenyang, 110159, China;2. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China;3. Equipment Engineering School, Shenyang Ligong University, Shenyang, 110159, China;1. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China;2. School of Visual Art, Hunan Mass Media Vocational and Technical College, Changsha, Hunan, 410100, China;3. Changsha Lizhun Detection Technology Service Co., Ltd., Changsha, Hunan, 410083, China;1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, China;2. Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, China;3. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China |
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| Abstract: | Insufficient permeability and membrane fouling significantly influence the efficiency of ceramic microfiltration (MF) membranes in oil/water emulsion treatment. In this study, a high-flux whisker layer ceramic MF membrane with super-hydrophilicity was successfully fabricated through gel-spin coating method and a low-temperature oxidation method, which was used to separate oil/water emulsion. The effects of the whisker layer and surface wettability were systematically investigated, and the mechanism of in-situ gelling and pore size distribution was proposed. The super-hydrophilic ceramic MF membrane with an average pore size of 250 nm exhibited a high gas flux of 934 m3/(m2·h·bar) and excellent pure water flux of 9754 L/(m2 h bar). Even after a long-term circulating filtration process, the super-hydrophilic ceramic MF membrane still maintained a high water flux of over 50 L/(m2·h) at a transmembrane pressure of 5 KPa during the treatment of oil-in-water emulsion with a concentration of 1000 mg/L. Overall, the developed ceramic MF membrane demonstrated high permeability and excellent anti-fouling performance, making it a promising candidate for oil/water emulsion wastewater treatment. |
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| Keywords: | Ceramic MF membrane Alumina whisker layer One step co-sintering process No-intermediate layer structure Oil-in-water emulsion treatment |
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