Effect of solvent evaporation conditions on gas separation performance for asymmetric polysulfone membranes

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TypeArticle
Journal titleJournal of Applied Polymer Science
Volume71
Issue9
Pages13671374; # of pages: 7
Subjectsolvent; evaporation conditions; gas separation; asymmetric polysulfone membrane
AbstractAsymmetric polysulfone membranes were prepared by the phase inversion technique under different solvent evaporation conditions prior to the gelation step. The membranes were cast from the two component system of polymer and N,N-dimethylacetamide in which the polymer concentration was changed from 25.0 to 30.0%. The solvent evaporation temperature was changed from 70 to 120°C, and the evaporation time was 0–15 min. Ethanol, water, or 2-propanol was used as the gelation media. The membranes were characterized by the measurement of oxygen/nitrogen permeation with the lamination technique and by observation with scanning electron microscopy. With an increase in the solvent evaporation time, the oxygen permeance decreased and its selectivity over nitrogen increased; although the permeance was in the range of 1–2 GPU, the oxygen selectivity over nitrogen exceeded 8. A correlation between the permeation performance and the operational parameters involved in the solvent evaporation process was obtained.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52099
NPARC number16131769
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Record identifierc06cba9a-9046-40f5-8e5a-4dc8108fc0d9
Record created2010-09-30
Record modified2016-05-09
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