A study of pore size distribution and mean pore size on unsupported gamma-alumina membranes prepared by modifications introduced in the alkoxide hydrolysis step

Unsupported γ-alumina membranes were prepared by sol-gel technique using aluminium sec-butoxide as starting material. The effect on the unsupported γ-Al 2O 3 microstructure has been studied of the addition to the hydrolysis water of several acids, a cationic exchange resin, and both simultaneously i...

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Bibliographic Details
Published in:Journal of membrane science 1992-04, Vol.69 (1), p.21-28
Main Authors: de Albani, Marta Isabel Dimitrijewits, Arciprete, Carlos Pablo
Format: Article
Language:English
Subjects:
ceramic membranes
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
membrane pore size
membrane preparation and structure
Membranes
microporous and porous membranes
sol-gel technique
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Summary:Unsupported γ-alumina membranes were prepared by sol-gel technique using aluminium sec-butoxide as starting material. The effect on the unsupported γ-Al 2O 3 microstructure has been studied of the addition to the hydrolysis water of several acids, a cationic exchange resin, and both simultaneously in the hydrolysis step. The pore size distribution, mean pore size and porosity of the γ-Al 2O 3 unsupported membranes were evaluated using the N 2 adsorption technique. The lowest mean pore size (24 Å) and the narrowest pore size distribution were obtained by using both the cationic exchange resin and perchloric acid.
ISSN:0376-7388
1873-3123
DOI:10.1016/0376-7388(92)80164-F