文献类型：期刊文献

英文题名：Preparation, characterization and permeation property of Al₂O₃, Al₂O₃-SiO₂ and Al₂O₃-kaolin hollow fiber membranes

作者：Han, Ling-Feng[1,2];Xu, Zhen-Liang[1,2];Cao, Yue[1];Wei, Yong-Ming[1];Xu, Hai-Tao[1]

机构：[1]ECUST, Chem Engn Res Ctr, Membrane Sci & Engn R&D Lab, Shanghai 200237, Peoples R China;[2]ECUST, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：372

期号：1-2

起止页码：154

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000289829200017)】；

基金：The authors would like to thank for financial support by the Key Technology R&D Program of China (20092X02032). Also we are grateful to Dr. Min Liu to help for the measurement of the three-point flexure breaking strength of these membranes.

语种：英文

外文关键词：Alumina; Silica; Kaolin; Preparation; Hollow fiber membrane

摘要：Al2O3, Al2O3-SiO2 and Al2O3-kaolin hollow fiber precursors were prepared by a wet-spinning method using polyethersulfone (PES), Al2O3, SiO2 and kaolin. The hollow fiber membranes were obtained after a preheating and sintering combining process. These inorganic hollow fiber membranes had been characterized by SEM, XRD, porosity, density, mechanical property, permeation property and the mean/maximum pore size as well as pore size distribution, to investigate the effects of SiO2 and kaolin on alpha-Al(2)OZ(3) hollow fiber membranes. The morphology of precursors depended on the particle contents and PES concentrations in the dispersion, and the final structure of sintered membranes were controlled by the precursors. XRD results showed that Al2O3 remained as alpha-Al2O3 before and after being sintered while SiO2 changed from tridymite to cristobalite from ambient temperature to 1450 degrees C, and at higher temperature it would react with Al2O3 to produce the stoichiometric 3:2 mullite (3Al(2)O(3)-2SiO(2), or Al6Si2O13) by solid state reaction. The effect of SiO2 and kaolin on the membrane properties depended on both the ratio of Al2O3:SiO2/kaolin and the sintering temperature. Moreover, when sintering temperature was 1600 degrees C, Al2O3-kaolin-5 (Al2O3 :kaolin = 1:1) achieved a mean pore size of about 0.5 mu m. (C) 2011 Elsevier B.V. All rights reserved.