膜科学与技术

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Study on the preparation of gradient-dense A12O3 hollow fiber membranes by co-sintering process

Authors： HAN Ling-feng，CAO Yue，XU Zhen-liang

Units： State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, Chemical Engineering Research Center, East China University of Science and Technology, Shanghai 200237, China

KeyWords： Co-sintering; gradient-dense; A12O3; hollow fiber membrane; preparation

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2012,32(4):21-24

Abstract：

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.

Funds：

国家自然科学基金（20076009和21176067）

AuthorIntro：

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

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