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Poly(arylene ether sulfone)s with phosphonic acid and bis(phosphonic acid) on short alkyl side chains for proton-exchange membranes

Parvole, Julien LU and Jannasch, Patric LU (2008) In Journal of Materials Chemistry 18(45). p.5547-5556
Abstract
Poly(arylene ether sulfone)s have been functionalised with alkyl side chains carrying phosphonic acid and bis(phosphonic acid) in order to investigate their properties as membrane materials. The phosphonated and bisphosphonated polymers were synthesised via lithiation of poly(arylene ether sulfone)s, followed by reactions with triethyl 3-phosphonopropionate and tetraisopropyl vinylidenediphosphonate, respectively. Flexible and mechanically tough acidic membranes were cast from solution after hydrolysis of the ester groups. The significantly higher acidity and acid concentrations of the membranes containing the tetraprotic bis(phosphonic acid) led to higher conductivities in comparison to the membranes containing the diprotic phosphonic... (More)
Poly(arylene ether sulfone)s have been functionalised with alkyl side chains carrying phosphonic acid and bis(phosphonic acid) in order to investigate their properties as membrane materials. The phosphonated and bisphosphonated polymers were synthesised via lithiation of poly(arylene ether sulfone)s, followed by reactions with triethyl 3-phosphonopropionate and tetraisopropyl vinylidenediphosphonate, respectively. Flexible and mechanically tough acidic membranes were cast from solution after hydrolysis of the ester groups. The significantly higher acidity and acid concentrations of the membranes containing the tetraprotic bis(phosphonic acid) led to higher conductivities in comparison to the membranes containing the diprotic phosphonic acid. Membranes containing 1.7 mmol of bis(phosphonic acid)/g dry polymer absorbed 28 wt% water when immersed at room temperature, and a conductivity of 25 mS/cm was measured at 120 °C. Moreover, the bisphosphonated membranes did not decompose at temperatures of up to 240 °C under air. The study also showed that high degrees of hydrolysis of the bisphosphonate units were crucial in order to reach the high proton conductivity and thermal stability necessary for fuel cell applications. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Materials Chemistry
volume
18
issue
45
pages
5547 - 5556
publisher
Royal Society of Chemistry
external identifiers
  • wos:000260834700017
  • other:CODEN: JMACEP
  • scopus:55849086539
ISSN
1364-5501
DOI
10.1039/B811755A
language
English
LU publication?
yes
id
ac5b3e3a-f0fc-4844-826d-2a59e74cf3b0 (old id 1240729)
alternative location
http://www.rsc.org/Publishing/Journals/JM/article.asp?doi=b811755a
date added to LUP
2008-11-03 12:50:29
date last changed
2017-10-01 03:47:40
@article{ac5b3e3a-f0fc-4844-826d-2a59e74cf3b0,
  abstract     = {Poly(arylene ether sulfone)s have been functionalised with alkyl side chains carrying phosphonic acid and bis(phosphonic acid) in order to investigate their properties as membrane materials. The phosphonated and bisphosphonated polymers were synthesised via lithiation of poly(arylene ether sulfone)s, followed by reactions with triethyl 3-phosphonopropionate and tetraisopropyl vinylidenediphosphonate, respectively. Flexible and mechanically tough acidic membranes were cast from solution after hydrolysis of the ester groups. The significantly higher acidity and acid concentrations of the membranes containing the tetraprotic bis(phosphonic acid) led to higher conductivities in comparison to the membranes containing the diprotic phosphonic acid. Membranes containing 1.7 mmol of bis(phosphonic acid)/g dry polymer absorbed 28 wt% water when immersed at room temperature, and a conductivity of 25 mS/cm was measured at 120 °C. Moreover, the bisphosphonated membranes did not decompose at temperatures of up to 240 °C under air. The study also showed that high degrees of hydrolysis of the bisphosphonate units were crucial in order to reach the high proton conductivity and thermal stability necessary for fuel cell applications.},
  author       = {Parvole, Julien and Jannasch, Patric},
  issn         = {1364-5501},
  language     = {eng},
  number       = {45},
  pages        = {5547--5556},
  publisher    = {Royal Society of Chemistry},
  series       = {Journal of Materials Chemistry},
  title        = {Poly(arylene ether sulfone)s with phosphonic acid and bis(phosphonic acid) on short alkyl side chains for proton-exchange membranes},
  url          = {http://dx.doi.org/10.1039/B811755A},
  volume       = {18},
  year         = {2008},
}