On the Loss of Hydraulic Permeability in Ceramic Membranes

The properties of inorganic membranes are dependent on the surface chemistry of the material, which in turn are affected by parameters such as temperature, pH, and chemisorption of molecules. For both silica and γ-alumina membranes, a significant reduction in water hydraulic permeability was observe...

Full description

Saved in:
Bibliographic Details
Published inJournal of colloid and interface science Vol. 181; no. 1; pp. 347 - 350
Main Authors Font, Josep, Castro, Robert P., Cohen, Yoram
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 15.07.1996
Elsevier
Subjects
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Membranes
Gamma form
Membrane
Experimental study
Liquid permeability
Alumina
Ceramic materials
Silica
Solvent
Online AccessGet full text

Cover

More Information
Summary:The properties of inorganic membranes are dependent on the surface chemistry of the material, which in turn are affected by parameters such as temperature, pH, and chemisorption of molecules. For both silica and γ-alumina membranes, a significant reduction in water hydraulic permeability was observed after heat treatment or exposure to organic solvents. For silica membranes, the water permeability reduction due to heating at 140°C has been attributed to the removal of physically adsorbed water, which exposes hydrophobic surface patches covered by isolated hydroxyl groups. In the case of γ-alumina membranes strong adsorption of a wide range of organic compounds can result in significant permeability loss.
ISSN:0021-9797
1095-7103
DOI:10.1006/jcis.1996.0390