Preparation of Ultrafiltration γ-Alumina Membrane with Preferential Orientation Structure by SOL-GEL Process

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (8): 1039.

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Preparation of Ultrafiltration γ-Alumina Membrane with Preferential Orientation Structure by SOL-GEL Process

PENG Ding-Kun, XIA Chang-Rong, MENG Guang-Yao, LI Fan-Qing, LU Bin, SHI Lei

Department of Material Science and Engineering, Open Laboratory of Structure Research, University of Science and Technology of China, Hefei, 230026

Received:1992-10-10 Revised:1993-03-31 Online:1993-08-24 Published:1993-08-24

Abstract

Abstract: γ-alumina porous membranes without pinholes or cracks were prepared by sol-gel process.The boehmite sol obtained from hydrolysis of aluminum tri-sec-butoxide was applied to porous α-alumina support by a dipping procedure.The effect of sol properties such as viscosity and concentration on the membrane performance was investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction and nitrogen ad-sorption-desorption(BET).It was found that the resulted γ-alumina membrane with nanoscale pore size and a narrow pore size distribution exhibited a preferential orientation structure in which the (110) crystal face of γ-alumina membrane paralleled to the support surface.

Key words: SOL-GEL method, Ultrafiltration ceramic membrane, Preferential orientation

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PENG Ding-Kun, XIA Chang-Rong, MENG Guang-Yao, LI Fan-Qing, LU Bin, SHI Lei. Preparation of Ultrafiltration γ-Alumina Membrane with Preferential Orientation Structure by SOL-GEL Process[J]. Chem. J. Chinese Universities, 1993, 14(8): 1039.

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Preparation of Ultrafiltration γ-Alumina Membrane with Preferential Orientation Structure by SOL-GEL Process

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