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Chemcial Industry and Engineering 2024, Vol. 41 Issue (2) :57-64    DOI: 10.13353/j.issn.1004.9533.20230827
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Low-temperature preparation and performance study of α-Al2O3 tight ultrafiltration membranes
SHI Weida1,2, QIU Minghui1, CHEN Xianfu1, DA Xiaowei2, FAN Yiqun1
1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211816, China;
2. Nanjing Membrane Material Industry Technology Institute Co., Ltd., Nanjing 211800, China

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Abstract α-Al2O3 has become a classic material for the preparation of ceramic membranes due to its low-cost price and excellent performance. However, α-Al2O3 requires high temperature to drive the phase transition, which will lead to the overgrowth of grains and aggregation of pores. In order to prepare α-Al2O3 ultrafiltration membranes with high permeability and small pore size, by adjusting the preparation parameters of the polymeric sol route and the heating conditions of the calcination process, an alumina polymeric sol that can complete the α-phase transition at 950 ℃ was prepared. Subsequently, α-Al2O3 ultrafiltration membranes with an ultra-thin separation layer and a defect-free α-Al2O3 ultrafiltration membrane were prepared through the study of membrane preparation parameters. The membranes exhibited good separation and permeation performance with good reproducibility, with a molecular weight cut-off of about 75 kDa and a permeability of about 250 L·m-2·h-1·bar-1.
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SHI Weida
QIU Minghui
CHEN Xianfu
DA Xiaowei
FAN Yiqun
Keywordssol-gel method   α-alumina   tight ultrafiltration membrane   low temperature calcination     
Received 2023-11-15;
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SHI Weida, QIU Minghui, CHEN Xianfu, DA Xiaowei, FAN Yiqun.Low-temperature preparation and performance study of α-Al2O3 tight ultrafiltration membranes[J]  Chemcial Industry and Engineering, 2024,V41(2): 57-64
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