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Tuning poly(arylene piperidinium) anion-exchange membranes by copolymerization, partial quaternization and crosslinking

Olsson, Joel LU ; Pham, Thanh Huong LU and Jannasch, Patric LU (2019) In Journal of Membrane Science 578. p.183-195
Abstract
Ion exchange membranes with high ionic contents typically suffer from excessive water uptake and dilution effects which compromise both mechanical properties and ion conductivity. In the present work we develop and compare partial quaternization, copolymerization and crosslinking as three different synthetic strategies to balance the ion exchange capacity (IEC), water uptake and hydroxide conductivity of poly(arylene piperidinium)s, which belong to a new class of alkali-stable anion-exchange membrane materials. Poly(biphenyl N-methylpiperidine) (PBPip) was first produced in a polyhydroxyalkylation reaction of biphenyl and N-methyl-4-piperidone, and then partly quaternized with controlled stoichiometric shortages of alkyl... (More)
Ion exchange membranes with high ionic contents typically suffer from excessive water uptake and dilution effects which compromise both mechanical properties and ion conductivity. In the present work we develop and compare partial quaternization, copolymerization and crosslinking as three different synthetic strategies to balance the ion exchange capacity (IEC), water uptake and hydroxide conductivity of poly(arylene piperidinium)s, which belong to a new class of alkali-stable anion-exchange membrane materials. Poly(biphenyl N-methylpiperidine) (PBPip) was first produced in a polyhydroxyalkylation reaction of biphenyl and N-methyl-4-piperidone, and then partly quaternized with controlled stoichiometric shortages of alkyl halide to regulate the IEC. In the second approach, a series of copolymers with controlled IEC were prepared by introducing precise amounts of ketone co-monomers in the polyhydroxyalkylations. In the final approach, crosslinked AEMs were fabricated in a reactive casting procedure, followed by partial quaternization. The overall results of the study reveals that the copolymerization approach gives AEMs with the most attractive set of properties. Hence, at a given IEC and moderate water uptake, the copolymer AEMs reach the highest hydroxide conductivity, up to 120 mS cm−1 at 80 °C, and retain the high alkaline stability of the original poly(arylene piperidinium) AEM. The study demonstrates the versatility and efficiency of these synthetic strategies to tailor and significantly improve the properties of functional high-performance AEMs for different electrochemical applications. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Membrane Science
volume
578
pages
183 - 195
publisher
Elsevier
external identifiers
  • scopus:85061780384
ISSN
0376-7388
DOI
10.1016/j.memsci.2019.01.036
language
English
LU publication?
yes
id
4acd630b-f483-43c5-a91e-17f00375ddb7
date added to LUP
2019-01-21 12:43:10
date last changed
2019-08-14 04:31:01
@article{4acd630b-f483-43c5-a91e-17f00375ddb7,
  abstract     = {Ion exchange membranes with high ionic contents typically suffer from excessive water uptake and dilution effects which compromise both mechanical properties and ion conductivity. In the present work we develop and compare partial quaternization, copolymerization and crosslinking as three different synthetic strategies to balance the ion exchange capacity (IEC), water uptake and hydroxide conductivity of poly(arylene piperidinium)s, which belong to a new class of alkali-stable anion-exchange membrane materials. Poly(biphenyl <i>N</i>-methylpiperidine) (PBPip) was first produced in a polyhydroxyalkylation reaction of biphenyl and <i>N</i>-methyl-4-piperidone, and then partly quaternized with controlled stoichiometric shortages of alkyl halide to regulate the IEC. In the second approach, a series of copolymers with controlled IEC were prepared by introducing precise amounts of ketone co-monomers in the polyhydroxyalkylations. In the final approach, crosslinked AEMs were fabricated in a reactive casting procedure, followed by partial quaternization. The overall results of the study reveals that the copolymerization approach gives AEMs with the most attractive set of properties. Hence, at a given IEC and moderate water uptake, the copolymer AEMs reach the highest hydroxide conductivity, up to 120 mS cm<sup>−1</sup> at 80 °C, and retain the high alkaline stability of the original poly(arylene piperidinium) AEM. The study demonstrates the versatility and efficiency of these synthetic strategies to tailor and significantly improve the properties of functional high-performance AEMs for different electrochemical applications.},
  author       = {Olsson, Joel and Pham, Thanh Huong and Jannasch, Patric},
  issn         = {0376-7388},
  language     = {eng},
  pages        = {183--195},
  publisher    = {Elsevier},
  series       = {Journal of Membrane Science},
  title        = {Tuning poly(arylene piperidinium) anion-exchange membranes by copolymerization, partial quaternization and crosslinking},
  url          = {http://dx.doi.org/10.1016/j.memsci.2019.01.036},
  volume       = {578},
  year         = {2019},
}