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Polysulfone ionomers for proton-conducting fuel cell membranes: sulfoalkylated polysulfones

Karlsson, Lina LU and Jannasch, Patric LU (2004) In Journal of Membrane Science 230(1-2). p.61-70
Abstract
Polysulfones (PSUs) carrying short pendant alkyl side-chains with terminal sulfonic acid units have been prepared and studied as proton-conducting membrane materials. The first step in the preparation involved quenching of lithiated PSU with SO2 gas, resulting in sulfinated PSU. In the second step, the lithium sulfinate units on the polymer were reacted with sodium 2-bromoethanesulfonate, sodium 3-bromopropanesulfonate, or 1,4-butane sultone to produce sulfoethylated, sulfopropylated, or sulfobutylated PSUs, respectively. Analysis by thermogravimetry showed that membranes based on the sulfoalkylated polymers were stable up to approximately 300degreesC under N-2 atmosphere. Calorimetry measurements revealed that the modified polymers... (More)
Polysulfones (PSUs) carrying short pendant alkyl side-chains with terminal sulfonic acid units have been prepared and studied as proton-conducting membrane materials. The first step in the preparation involved quenching of lithiated PSU with SO2 gas, resulting in sulfinated PSU. In the second step, the lithium sulfinate units on the polymer were reacted with sodium 2-bromoethanesulfonate, sodium 3-bromopropanesulfonate, or 1,4-butane sultone to produce sulfoethylated, sulfopropylated, or sulfobutylated PSUs, respectively. Analysis by thermogravimetry showed that membranes based on the sulfoalkylated polymers were stable up to approximately 300degreesC under N-2 atmosphere. Calorimetry measurements revealed that the modified polymers absorbed large amounts of non-freezing water, corresponding to 11-14 mol H2O/mol SO3H under immersed conditions. The proton conductivity of a membrane based on a PSU carrying 0.9 sulfopropyl chains per repeating unit was measured to be 77 mS/cm at 70degreesC under humidifying conditions. (C) 2003 Elsevier B.V. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
Ion exchange membrane, Polysulfone, Water absorption, Sulfonation, Proton conducting electrolyte
in
Journal of Membrane Science
volume
230
issue
1-2
pages
61 - 70
publisher
Elsevier
external identifiers
  • wos:000189087000007
  • scopus:0942268596
ISSN
0376-7388
DOI
10.1016/j.memsci.2003.10.033
language
English
LU publication?
yes
id
154a7344-6092-4bc9-b07f-521c8c66072e (old id 139549)
date added to LUP
2007-07-13 12:47:08
date last changed
2017-10-22 04:44:23
@article{154a7344-6092-4bc9-b07f-521c8c66072e,
  abstract     = {Polysulfones (PSUs) carrying short pendant alkyl side-chains with terminal sulfonic acid units have been prepared and studied as proton-conducting membrane materials. The first step in the preparation involved quenching of lithiated PSU with SO2 gas, resulting in sulfinated PSU. In the second step, the lithium sulfinate units on the polymer were reacted with sodium 2-bromoethanesulfonate, sodium 3-bromopropanesulfonate, or 1,4-butane sultone to produce sulfoethylated, sulfopropylated, or sulfobutylated PSUs, respectively. Analysis by thermogravimetry showed that membranes based on the sulfoalkylated polymers were stable up to approximately 300degreesC under N-2 atmosphere. Calorimetry measurements revealed that the modified polymers absorbed large amounts of non-freezing water, corresponding to 11-14 mol H2O/mol SO3H under immersed conditions. The proton conductivity of a membrane based on a PSU carrying 0.9 sulfopropyl chains per repeating unit was measured to be 77 mS/cm at 70degreesC under humidifying conditions. (C) 2003 Elsevier B.V. All rights reserved.},
  author       = {Karlsson, Lina and Jannasch, Patric},
  issn         = {0376-7388},
  keyword      = {Ion exchange membrane,Polysulfone,Water absorption,Sulfonation,Proton conducting electrolyte},
  language     = {eng},
  number       = {1-2},
  pages        = {61--70},
  publisher    = {Elsevier},
  series       = {Journal of Membrane Science},
  title        = {Polysulfone ionomers for proton-conducting fuel cell membranes: sulfoalkylated polysulfones},
  url          = {http://dx.doi.org/10.1016/j.memsci.2003.10.033},
  volume       = {230},
  year         = {2004},
}