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共烧结法制备梯度致密化A12O3中空纤维膜的研究

作者：韩灵凤，曹悦，许振良

单位：华东理工大学化学工程联合国家重点实验室，化学工程研究所膜科学与工程研发中心，上海200237

关键词：共烧结；梯度致密；A12O3；中空纤维膜；制备

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2012,32(4):21-24

摘要：

采用实验室自制的A12O3中空纤维膜为基膜，以Al2O3粉末分散液和Al粉分散液为原料，采用真空抽滤法与浸渍法制备过渡层，再浸涂勃母石溶胶，烧结形成梯度致密化A12O3中空纤维膜。讨论了梯度致密化Al2O3中空纤维膜的形貌、泡点压力、膜孔径与渗透性能等因素，结果表明造成膜性能差异的主要原因有两点：1）A12O3粉末与Al粉的熔点差异；2）真空抽滤形成的滤饼与浸涂形成的吸附层之间的厚度差。同时，所制得的梯度致密化A12O3中空纤维膜纯水通量为17~2990 L•m-2•h-1•bar-1，平均孔径为0.04~0.52 μm。

Using self-prepared A12O3 hollow fiber membranes as the substrates, A12O3 and Al aqueous suspensions were used as materials for the intermediate layer of gradient-dense A12O3 hollow fiber membranes by vacuum filtration and dipping method respectively. Then the obtained membranes with intermediate layers from the two suspensions by two coating methods were modified by self-prepared boehmite sol and gradient-dense A12O3 hollow fiber membranes were obtained after a sintering process. The morphology, bubble point pressure, maximum pore size and permeation property of the membranes were discussed. The results indicated there were two main reasons for the difference among membrane performances: 1) the melting temperature difference between A12O3 and Al powders; 2) the thickness difference between the formed cake during the filtration process and the adsorption layer of the aqueous solutions by dipping method. The pure water flux and mean pore size of the prepared gradient-dense A12O3 hollow fiber membranes are 17~2990 L•m-2•h-1•bar-1 and 0.04~0.52 μm, respectively.

基金项目：

国家自然科学基金（20076009和21176067）

作者简介：

韩灵凤（1986—），女，河南信阳人，博士研究生，主要从事膜分离技术的研究工作。通讯联系人：许振良，Tel：021-64252989；Email：chemxuzl@ecust.edu.cn

参考文献：

[1] 徐南平. 面向应用过程的陶瓷膜材料设计、制备与应用[M]. 北京: 科学出版社, 2005, 03.
[2] Sigmund W M, Bell N S, Bergstrom L. Novel powder-processing methods for advanced ceramics. [J]. J Am Ceram Soc, 2000, 83(7): 1557~1574.
[3] Qiu M H, Fan S, Cai Y Y, et al. Co-sintering synthesis of bi-layer titania ultra?ltration membranes with intermediate layer of sol-coated nano?bers. [J]. J Membr Sci, 2010, 365: 225~231.
[4] Li Jing-feng, Xu Zhen-liang, Yang Hu, et al. Effect of TiO2 nanoparticles on the surface morphology and performance of microporous PES membrane. [J]. Appl Surf Sci, 2009, 255: 4725~4732.
[5] 许振良, 韩灵凤, 俞丽芸, 等. 中空纤维陶瓷膜的研究进展. [J]. 化学世界, 2010, 51(3): 183~188.
[6] Lang Wan-zhong, Xu Zhen-liang, Yang Hu, et al. Preparation and characterization of PVDF-PFSA blend hollow fiber UF membrane. [J]. J Membr Sci, 2007, 288: 123~131.
[7] Koonaphapdeelert S, Li K. Preparation and characterization of hydrophobic ceramic hollow fibre membrane. [J]. J Membr Sci, 2007, 291: 70~76.
[8] Han Ling-feng, Xu Zhen-liang, Yu Li-yun, et al. Performance of PVDF/multi-nanoparticles composite hollow fibre ultrafiltration membranes. [J]. Iranian Polymer Journal, 2010, 19 (7): 553~565.
[9] Yu Li-yun, Shen Hong-mei, Xu Zhen-liang. PVDF-TiO2 composite hollow fiber UF membranes prepared by TiO2 sol-gel method and blending method. [J]. J Appl Polym Sci, 2009, 113: 1763~1772.
[10] Han Ling-feng, Xu Zhen-liang, Yue Cao, et al. Preparation, characterization and permeation property of Al2O3, Al2O3-SiO2 and Al2O3-kaolin hollow fiber membranes. [J]. J Membr Sci, 2011, 372(1~2): 154~164.
[11] Kingsbury B F K, Li K. A morphological study of ceramic hollow fibre membranes. [J]. J. Membr. Sci. 2009, 328: 134~140.

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