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Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent

The effects of non-solventadditives, polymeric additives, polymer concentration and volatile solvent on the performance and morphology of polysulfone flat sheet gas separation membranes have been investigated. The isothermal phase diagram of polysulfone (PSF)–(NMP/additive)–(water) ternary system at...

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Main Authors: Ismail, Ahmad Fauzi, Aroon, M. A., Montazer-Rahmatib, M. M., Matsuuraa, T.
Format: Article
Published: Elsevier B.V. 2010
Subjects:
T Technology (General)
Online Access:http://eprints.utm.my/id/eprint/26294/
http://dx.doi.org/10.1016/j.seppur.2010.02.009
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spelling my.utm.262942018-11-09T08:07:46Z http://eprints.utm.my/id/eprint/26294/ Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent Ismail, Ahmad Fauzi Aroon, M. A. Montazer-Rahmatib, M. M. Matsuuraa, T. T Technology (General) The effects of non-solventadditives, polymeric additives, polymer concentration and volatile solvent on the performance and morphology of polysulfone flat sheet gas separation membranes have been investigated. The isothermal phase diagram of polysulfone (PSF)–(NMP/additive)–(water) ternary system at 25 °C was provided based on the visual cloud point experiment. Flat sheet membranes were fabricated by the phase inversion technique. Scanning electron microscope (SEM) was used to analyze the morphology of fabricated membranes and their gas separation properties characterized by gaspermeation test using pure carbon dioxide and methane as test gases. The results showed that addition of additives to the polymer solution brought the cloud point curves closer to the (polymer)–(solvent/additive) axis in the following order: PEG < ethanol < PVP < glycerol. The gaspermeation test results showed that ideal CO2/CH4 separation factor of the membranes improved by the presence of the additives in the following order: PEG < ethanol < PVP < glycerol. This was in accordance with the shift of binodal line to the (polymer)–(solvent/non-solvent) axis. The critical concentration of polysulfone in 1-methyl-2-pyrrolidone (NMP) solvent was determined by viscometry experiment to be about 30 wt.%. Addition of tetrahydrofuran (THF) as a volatile solvent into the polymer solution increased the membrane selectivity, which was attributed to elimination of the macro-void formation during instantaneous demixing and selective loss of highly volatile solvent from the outermost surface of the membrane during polymer solution casting. Elsevier B.V. 2010 Article PeerReviewed Ismail, Ahmad Fauzi and Aroon, M. A. and Montazer-Rahmatib, M. M. and Matsuuraa, T. (2010) Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent. Separation and Purification Technology, 72 (2). 194 - 202. ISSN 1383-5866 http://dx.doi.org/10.1016/j.seppur.2010.02.009 DOI:10.1016/j.seppur.2010.02.009
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic T Technology (General)
spellingShingle T Technology (General)
Ismail, Ahmad Fauzi
Aroon, M. A.
Montazer-Rahmatib, M. M.
Matsuuraa, T.
Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
description The effects of non-solventadditives, polymeric additives, polymer concentration and volatile solvent on the performance and morphology of polysulfone flat sheet gas separation membranes have been investigated. The isothermal phase diagram of polysulfone (PSF)–(NMP/additive)–(water) ternary system at 25 °C was provided based on the visual cloud point experiment. Flat sheet membranes were fabricated by the phase inversion technique. Scanning electron microscope (SEM) was used to analyze the morphology of fabricated membranes and their gas separation properties characterized by gaspermeation test using pure carbon dioxide and methane as test gases. The results showed that addition of additives to the polymer solution brought the cloud point curves closer to the (polymer)–(solvent/additive) axis in the following order: PEG < ethanol < PVP < glycerol. The gaspermeation test results showed that ideal CO2/CH4 separation factor of the membranes improved by the presence of the additives in the following order: PEG < ethanol < PVP < glycerol. This was in accordance with the shift of binodal line to the (polymer)–(solvent/non-solvent) axis. The critical concentration of polysulfone in 1-methyl-2-pyrrolidone (NMP) solvent was determined by viscometry experiment to be about 30 wt.%. Addition of tetrahydrofuran (THF) as a volatile solvent into the polymer solution increased the membrane selectivity, which was attributed to elimination of the macro-void formation during instantaneous demixing and selective loss of highly volatile solvent from the outermost surface of the membrane during polymer solution casting.
format Article
author Ismail, Ahmad Fauzi
Aroon, M. A.
Montazer-Rahmatib, M. M.
Matsuuraa, T.
author_facet Ismail, Ahmad Fauzi
Aroon, M. A.
Montazer-Rahmatib, M. M.
Matsuuraa, T.
author_sort Ismail, Ahmad Fauzi
title Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
title_short Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
title_full Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
title_fullStr Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
title_full_unstemmed Morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
title_sort morphology and permeation properties of polysulfone membranes for gas separation: effects of non-solvent additives and co-solvent
publisher Elsevier B.V.
publishDate 2010
url http://eprints.utm.my/id/eprint/26294/
http://dx.doi.org/10.1016/j.seppur.2010.02.009
_version_ 1643647734052290560
score 13.211869

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