Preparation and Characterization of Alumina Membranes on Capillary Supports： Effect of Film-coating on Crack-free Membrane Preparation
Preparation and Characterization of Alumina Membranes on Capillary Supports： Effect of Film-coating on Crack-free Membrane Preparation作者机构：State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemistry and Chemical Engineering Nanjing University of Technology Nanjing 210009 China
出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)
年 卷 期：2010年第18卷第3期
页 面：377-383页
核心收录：
学科分类：080503[工学-材料加工工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：Supported by the National High Technology Research and Development Program of China (2007AA030303) the National Basic Research Program of China (2009CB623400) and the National Natural Science Foundation of China (20776067)
主 题：capillary film coating dip-coating ceramic membrane
摘 要：Ceramic capillary membrane has received much attention due to its relatively high pack density and favorable mechanical ***,it is difficult to prepare capillary membrane on its thin support by a dip-coating *** this study,alumina microfiltration membranes were prepared on the inner surface of alumina capillary support(outer diameter 4 mm,inner diameter 2.5 mm)by a dip-coating *** electron microscopy(SEM)observation,gas bubble pressure(GBP)method and membrane permeation test were carried out to evaluate membrane *** major effects in preparation of crack-free membrane,capillary filtration and film-coating,upon the thin support were *** as-prepared crack-free membrane presents a narrow pore size distribution,a mean pore size of about 0.6μm and a high pure water flux of 86000 L·m -2 ·h -1 ·*** is proved that the membrane thickness should be sufficiently large to overcome the defects of support surface,but it is only one of the prerequisites for the formation of crack-free ***,it is demonstrated that the capillary filtration effect is greatly restricted for thin capillary support with the dip-coating method and the film-coating effect plays a crucial role in the formation of crack-free membrane.
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