One-step preparation of asymmetric ceramic membranes based on sea urchin-like mullite whisker skeletons and their oil-water separation properties |
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| Affiliation: | 1. Department of Mining and Metallurgical Engineering, Yazd University, Yazd, Iran;2. Department of Ceramics, Materials and Energy Research Centre, Karaj, Iran;3. Department of Materials, Mechanics, Management and Design, Delft University of Technology, Delft, the Netherlands;1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. Beijing Institute of Technology Tangshan Research Institute, Tangshan 063000, China;3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;1. Eskisehir Technical University, Faculty of Engineering, Department of Materials Science and Engineering, 26555, Eskisehir, Turkey;2. MDA Advanced Ceramics, Organize Sanayi Bolgesi Teknoloji Bulvari, 26250, Eskisehir, Turkey;1. Department of Materials Design Innovation Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan;2. Research Center for Functional Materials, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan;3. Department of Mechanical Science and Bioengineering, Osaka University, 1-3 Machikaneyamacho, Toyonaka, Osaka 560-8531, Japan;1. State Key Laboratory for Mechanical Behavior of Materials & School of Materials Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;2. State Key Laboratory for Mechanical Behavior of Materials & School of Electronic and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China;3. Yixin Electronic Material Co., Ltd, Rizhao 272306, China;1. School of Material Science and Engineering, Zhengzhou University, NO.100 Science Avenue, Zhengzhou 450001, China;2. Henan Key Laboratory of High-Temperature Functional Ceramics, Zhengzhou University, 75 Daxue Road, Zhengzhou 450052, China;3. School of Chemistry and Chemical Engineering, Henan University of Science and Technology, Luoyang, Henan 471023, China;4. China Tobacco Henan Industrial Co Ltd, Zhengzhou 450000, China |
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| Abstract: | In this work, novel sandwich-type asymmetric ceramic microfiltration membranes with a sea urchin-like mullite whisker skeleton were prepared one step. Their structural properties and oil-water separation performance were investigated. The results show that after sintering at 1400 °C, the prepared membrane possesses good hydrophilic, underwater oleophobic, and anti-fouling properties. During the continuous separation of a 300 mg/L oil-in-water emulsion, a maximum stable flux of 267 L·m?2·h?1 was achieved without membrane cleaning. After chemical cleaning and simple physical cleaning, the membranes recovered to a steady flux of 397 L·m?2·h?1 and 305 L·m?2·h?1, respectively, and maintained a 95% oil rejection. The good underwater oleophobicity and selective permeability brought about by the flat-lying whiskers on the top surface, coupled with the efficient water channels between the sea urchin-like structures inside the membrane, are considered to be the main reasons for its improved separation characteristics over conventional low-cost ceramic membranes. |
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| Keywords: | Ceramic membrane Mullite whiskers Asymmetric microstructure Oily wastewater Separation properties |
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