Enhanced performance in pervaporation of supercritical carbon dioxide treated poly[1-(trimethylsilyl)-1-propyne] membranes
(2011) In Journal of Membrane Science 382(1-2). p.177-185- Abstract
- The effect of a supercritical carbon dioxide (scCO(2)) treatment on the free volume of poly[1-(trimethylsilyl)-1-propyne] (PTMSP) and PTMSP-silica nanohybrid membranes was investigated with positron annihilation lifetime spectroscopy (PALS) and correlated with their performance in pervaporation. Treatment of dense unfilled PTMSP and silica filled PTMSP (2.5, 10 and 20 wt.% silica) membranes with scCO(2) at different pressures and temperatures, resulted in a clear increase in the mean free volume size and an enhanced performance in the pervaporative separation of an aqueous ethanol mixture. Specific permeation rate increases up to 76% were observed for the unfilled membranes treated with scCO(2) at 70 degrees C and 24 MPa. The... (More)
- The effect of a supercritical carbon dioxide (scCO(2)) treatment on the free volume of poly[1-(trimethylsilyl)-1-propyne] (PTMSP) and PTMSP-silica nanohybrid membranes was investigated with positron annihilation lifetime spectroscopy (PALS) and correlated with their performance in pervaporation. Treatment of dense unfilled PTMSP and silica filled PTMSP (2.5, 10 and 20 wt.% silica) membranes with scCO(2) at different pressures and temperatures, resulted in a clear increase in the mean free volume size and an enhanced performance in the pervaporative separation of an aqueous ethanol mixture. Specific permeation rate increases up to 76% were observed for the unfilled membranes treated with scCO(2) at 70 degrees C and 24 MPa. The scCO(2)-treatment could thus be seen as an effective alternative to PTMSP-silica (50 wt.%) membranes, which cause a 72% increase in specific permeation rate. Moreover, the ethanol concentration in the permeate increases significantly upon treating the membranes with scCO(2). (C) 2011 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2212717
- author
- Claes, Stan ; Vandezande, Pieter ; Mullens, Steven ; Van Bael, Marlies K. and Maurer, Frans LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Pervaporation, Supercritical carbon dioxide, Poly[1-(trimethylsilyl)-1-propyne], Free volume, PALS
- in
- Journal of Membrane Science
- volume
- 382
- issue
- 1-2
- pages
- 177 - 185
- publisher
- Elsevier
- external identifiers
-
- wos:000295503800018
- scopus:80052761301
- ISSN
- 0376-7388
- DOI
- 10.1016/j.memsci.2011.08.009
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- 2fa2dd79-8a38-4eb6-9aef-3032a7478fe4 (old id 2212717)
- date added to LUP
- 2016-04-01 13:35:33
- date last changed
- 2022-01-27 19:58:38
@article{2fa2dd79-8a38-4eb6-9aef-3032a7478fe4,
abstract = {{The effect of a supercritical carbon dioxide (scCO(2)) treatment on the free volume of poly[1-(trimethylsilyl)-1-propyne] (PTMSP) and PTMSP-silica nanohybrid membranes was investigated with positron annihilation lifetime spectroscopy (PALS) and correlated with their performance in pervaporation. Treatment of dense unfilled PTMSP and silica filled PTMSP (2.5, 10 and 20 wt.% silica) membranes with scCO(2) at different pressures and temperatures, resulted in a clear increase in the mean free volume size and an enhanced performance in the pervaporative separation of an aqueous ethanol mixture. Specific permeation rate increases up to 76% were observed for the unfilled membranes treated with scCO(2) at 70 degrees C and 24 MPa. The scCO(2)-treatment could thus be seen as an effective alternative to PTMSP-silica (50 wt.%) membranes, which cause a 72% increase in specific permeation rate. Moreover, the ethanol concentration in the permeate increases significantly upon treating the membranes with scCO(2). (C) 2011 Elsevier B.V. All rights reserved.}},
author = {{Claes, Stan and Vandezande, Pieter and Mullens, Steven and Van Bael, Marlies K. and Maurer, Frans}},
issn = {{0376-7388}},
keywords = {{Pervaporation; Supercritical carbon dioxide; Poly[1-(trimethylsilyl)-1-propyne]; Free volume; PALS}},
language = {{eng}},
number = {{1-2}},
pages = {{177--185}},
publisher = {{Elsevier}},
series = {{Journal of Membrane Science}},
title = {{Enhanced performance in pervaporation of supercritical carbon dioxide treated poly[1-(trimethylsilyl)-1-propyne] membranes}},
url = {{http://dx.doi.org/10.1016/j.memsci.2011.08.009}},
doi = {{10.1016/j.memsci.2011.08.009}},
volume = {{382}},
year = {{2011}},
}