α-Al2O3小孔径超滤膜低温制备与性能研究

摘要 α-Al₂O₃以低廉的价格与优秀的性能成为制备陶瓷膜的经典材料,然而α-Al₂O₃需高温驱动相变,高温会导致晶粒的过度生长与孔隙的聚结,这不利于超滤膜的制备。为制备具有高选择性的α-Al₂O₃小孔径超滤膜,采用聚合溶胶路线,通过调节溶胶合成参数影响其热处理过程中的结构转化以促进α-Al₂O₃的低温制备。在950 ℃下煅烧的前驱体完全转变为α-Al₂O₃。通过考察涂膜时间提升膜面完整性并采用该热处理条件制备了具有超薄分离层的α-Al₂O₃超滤膜。该膜展现出良好的分离与渗透性能,并具有较好的重复性,截留相对分子质量约为75 kDa,渗透率约为250 L·m^-2·h^-1·bar^-1。

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关键词：溶胶凝胶法 α-Al₂O₃ 小孔径超滤膜低温制备

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.

Keywords： sol-gel method α-alumina tight ultrafiltration membrane low temperature calcination

Received 2023-11-15;

Fund:国家重点研发计划项目(2022YFB3805001);国家自然科学基金(21921006,22078147);天津市合成生物技术创新能力提升项目(TSBICIP-KJGG-002);江苏省教育厅青蓝计划。

Corresponding Authors: 范益群,教授,E-mail:yiqunfan@njtech.edu.cn。 Email: yiqunfan@njtech.edu.cn

About author: 史伟达(1996-),男,博士研究生,研究方向为陶瓷超滤膜材料制备及其应用过程。

引用本文:

史伟达, 邱鸣慧, 陈献富, 笪晓薇, 范益群.α-Al₂O₃小孔径超滤膜低温制备与性能研究[J]. 化学工业与工程, 2024,41(2): 57-64

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, 2024,41(2): 57-64

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