An asymmetric alumina ceramic membrane was prepared by secondary dip coating. The influence of different dispersants and dip coating parameters on the microstructure of the membrane separation layer was explored. Meanwhile, the pure water fluxes of the membranes with various microstructures were also studied. The results show that a separation layer with a defect-free thickness of 16.5 μm and high surface flatness can be obtained when using polycarboxylate as a dispersant and twice dip coating within 2 s + 1 s and the pure water flux of an asymmetric membrane up to 1153 L × m-2 × h-1 × bar-1. The present work provides a simple and effective method for controlling the morphology and permeation performance of an asymmetric alumina membrane.
Funding statement: The authors gratefully acknowledge the support for this research by the National Science Foundation of China (Grant No. 52062021, 51662019).
About the authors
Huaitao Zhang, born in 1993, is a Postgraduate student in the Department of Materials Engineering of Jingdezhen Ceramic Institute. Currently, he is an Assistant in the Key Laboratory of Inorganic Membrane of Jingdezhen Ceramic Institute.
Prof. Dr. Xuebing Hu, born in 1979, completed his PhD at the Chinese Academy of Science, Shanghai, in 2014. Currently, he is working as Professor of Materials Science in the Department of Materials Engineering of Jingdezhen Ceramic Institute, Jingdezhen, China. His current research interests include membrane materials, functional coating and 2D materials.
Xin Liu, born in 1997, is a Postgraduate student in the Department of Materials Engineering of Jingdezhen Ceramic Institute. Currently, he is an Assistant in the Key Laboratory of Inorganic Membrane of Jingdezhen Ceramic Institute.
Zhiyong Yang, born in 1997, is a Postgraduate student in the Department of Materials Engineering of Jingdezhen Ceramic Institute. Currently, he is an Assistant in the Key Laboratory of Inorganic Membrane of Jingdezhen Ceramic Institute.
Prof. Dr. Yun Yu, born in 1967, completed her PhD at the Chinese Academy of Science, Shanghai, in 2000. Currently, she is working as Professor of Materials Science at the Shanghai Institute of Ceramics, China. Her current research interests include novel 2D materials and inorganic coating.
Prof. Dr. Yongqing Wang, born in 1966, completed his PhD at South China University of Technology, Guangzhou, in 2005. Currently, he is working as Professor of Materials Science in the Department of Materials Engineering of Jingdezhen Ceramic Institute, China. His current research interests include ceramic materials and materials process.
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