Title: The influence of filler concentration on the compaction and filtration properties of Zirfon (R)-composite ultrafiltration membranes
Authors: Aerts, P ×
Greenberg, AR
Leysen, R
Krantz, WB
Reinsch, VE
Jacobs, Pierre #
Issue Date: 2001
Series Title: Separation and purification technology vol:22-3 issue:1-3, Sp. Iss. SI pages:663-669
Conference: date:Flemish Inst Technol Res, Vlaamse Instelling Technol Onderzoek, B-2400 Mol, Belgium; Univ Colorado, Dept Mech Engn, Membrane Appl Sci & Technol Ctr, Boulder, CO 80309 USA; Univ Colorado, Dept Chem Engn, Membrane Appl Sci & Technol Ctr, Boulder, CO 80309 USA; Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, Fac Agr & Appl Biol Sci, B-3001 Louvain, Belgium
Abstract: During ultrafiltration, a transmembrane pressure difference is applied across a polymeric membrane. This pressure difference results in solute transport through the membrane and mechanical compression of the membrane. The ultrasonic time-domain reflectometry (UTDR) technique is used to measure mechanical compression of the membrane structure in real time while water permeability is simultaneously measured during ultrafiltration in a specially designed crossflow filtration cell. The membranes used in this study are Zirfon(R) organo-mineral membranes fabricated using 0.9-mum zirconia particles at three different loadings. Thickness changes and the permeability of composite ultrafiltration membranes are obtained simultaneously and in real-time as a function of filler concentration and transmembrane pressure. Results indicate that the presence of ZrO2 particles in the polymeric matrix influences the membrane permeability as well as compression of the membrane structure. Increasing the filler concentration decreases the elastic strain component but increases the lime-dependent strain component. Both the initial and the time-dependent strain increase with increasing pressure. The Aux decline is more severe at higher pressures and appears to be due to localized deformation in the membrane skin layer. This study provides the first quantitative information regarding compaction of organo-mineral Zirfon(R) membranes. (C) 2001 Elsevier Science B.V. All rights reserved.
ISSN: 1383-5866
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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