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Nanostructure-property relationship of two perfluorinated sulfonic acid (PFSA) membranes

Choi, Seung Young LU ; Ikhsan, Muhammad Mara ; Jin, Kyeong Sik and Henkensmeier, Dirk (2022) In International Journal of Energy Research 46(8). p.11265-11277
Abstract

The physicochemical properties of perfluorinated sulfonic acid (PFSA) polymers are closely correlated with their nanostructure. However, their real nano-structural morphology is still controversial because it is difficult to observe their accurate morphology at the nanoscale. Moreover, studies on the nanostructures of the PFSA membranes have been mainly focused on the ionic domain. On this basis, here we describe the crystalline domain of two PFSA membranes as well as their ionic domain based on small-angle X-ray scattering results. Both ionic and crystalline domains showed significant alterations during hydration, and the different behaviors based on the side-chain length of the two PFSA membranes are also described. The short side... (More)

The physicochemical properties of perfluorinated sulfonic acid (PFSA) polymers are closely correlated with their nanostructure. However, their real nano-structural morphology is still controversial because it is difficult to observe their accurate morphology at the nanoscale. Moreover, studies on the nanostructures of the PFSA membranes have been mainly focused on the ionic domain. On this basis, here we describe the crystalline domain of two PFSA membranes as well as their ionic domain based on small-angle X-ray scattering results. Both ionic and crystalline domains showed significant alterations during hydration, and the different behaviors based on the side-chain length of the two PFSA membranes are also described. The short side chain-tethered PFSA membrane (higher ion exchange capacity (IEC)) showed a widespread ionic domain and lacking crystalline domain with their relatively temperature-dependent tendency compared to the flexible long side chain-tethered PFSA membrane (lower IEC). On this basis, the correlation between nanostructure and membrane properties is described from various perspectives.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Aquivion, Nafion, PFSA, proton exchange membrane, SAXS
in
International Journal of Energy Research
volume
46
issue
8
pages
11265 - 11277
publisher
John Wiley & Sons Inc.
external identifiers
  • scopus:85128208428
ISSN
0363-907X
DOI
10.1002/er.7926
language
English
LU publication?
yes
id
83a9afbe-8c00-4f0f-bb0f-bc2def89b2b6
date added to LUP
2022-07-01 15:10:58
date last changed
2022-10-31 14:55:33
@article{83a9afbe-8c00-4f0f-bb0f-bc2def89b2b6,
  abstract     = {{<p>The physicochemical properties of perfluorinated sulfonic acid (PFSA) polymers are closely correlated with their nanostructure. However, their real nano-structural morphology is still controversial because it is difficult to observe their accurate morphology at the nanoscale. Moreover, studies on the nanostructures of the PFSA membranes have been mainly focused on the ionic domain. On this basis, here we describe the crystalline domain of two PFSA membranes as well as their ionic domain based on small-angle X-ray scattering results. Both ionic and crystalline domains showed significant alterations during hydration, and the different behaviors based on the side-chain length of the two PFSA membranes are also described. The short side chain-tethered PFSA membrane (higher ion exchange capacity (IEC)) showed a widespread ionic domain and lacking crystalline domain with their relatively temperature-dependent tendency compared to the flexible long side chain-tethered PFSA membrane (lower IEC). On this basis, the correlation between nanostructure and membrane properties is described from various perspectives.</p>}},
  author       = {{Choi, Seung Young and Ikhsan, Muhammad Mara and Jin, Kyeong Sik and Henkensmeier, Dirk}},
  issn         = {{0363-907X}},
  keywords     = {{Aquivion; Nafion; PFSA; proton exchange membrane; SAXS}},
  language     = {{eng}},
  number       = {{8}},
  pages        = {{11265--11277}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{International Journal of Energy Research}},
  title        = {{Nanostructure-property relationship of two perfluorinated sulfonic acid (PFSA) membranes}},
  url          = {{http://dx.doi.org/10.1002/er.7926}},
  doi          = {{10.1002/er.7926}},
  volume       = {{46}},
  year         = {{2022}},
}