Post-Hydration Crosslinking of Ion Exchange Membranes to Control Water Content

Barnett, Adam; Karnes, John J.; Clemens, Auston L.; Oakdale, James S.; Molinero, Valeria

doi:10.1021/acs.jpcc.3c00074

Post-Hydration Crosslinking of Ion Exchange Membranes to Control Water Content

Journal Article · Mon Mar 13 00:00:00 EDT 2023 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.3c00074· OSTI ID:1968132

Barnett, Adam ^[1]; ^[2]; ^[2]; Oakdale, James S. ^[2]; ^[1]

University of Utah, Salt Lake City, UT (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

The utilization of crosslinking as a technique to limit excess water uptake in ion exchange membranes is a well-established approach. However, traditional methods involve performing the crosslinking reaction before the membrane self-segregates into hydrophilic and hydrophobic domains upon exposure to water. In this study, we employ numerical and molecular simulations to explore the potential of post-hydration crosslinking of the polymer at subsaturated conditions. This process allows for the development of a nanosegregated morphology, which establishes well-connected but narrow water channels, while limiting additional sorption of water. The significant reduction in membrane swelling observed in our study indicates that post-hydration crosslinking could be a promising approach to regulate water uptake in ion exchange membranes. Here based on our analyses, we propose chemical crosslinking strategies that may yield high membrane gel fractions.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-07NA27344

OSTI ID:: 1968132

Report Number(s):: LLNL-JRNL-841550; 1063483

Journal Information:: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 11 Vol. 127; ISSN 1932-7447

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Post-Hydration Crosslinking of Ion Exchange Membranes to Control Water Content

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