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Title: Thin, robust, and chemically stable photo-cross-linked anion exchange membranes based on a polychlorostyrene-b-polycyclooctene-b-polychlorostyrene ABA triblock polymer

Abstract

A polychloromethylstyrene-b-polypolycyclooctene-b-polychloromethylstyrene ABA triblock polymer was used as a backbone in a study to produce a chemically and mechanically robust anion exchange membrane (AEM). The material is easily scalable and the polypolycyclooctene segment (low T m) makes the membrane flexible to handle. Comparison of the non-crosslinked triblock polymer functionalized with different cations namely; piperidinium, pyrrolidinium, tris(2,4,6-trimethoxyphenyl) phosphonium, and the benchmark trimethylammonium cation showed that the piperidinium functionalized membrane with an ionic exchange capacity of ca. 1.36 mmol.g -1 had the highest OH - conductivity ca. 95 mS·cm -1 at 80 °C, 95% RH, and the highest Cl - conductivity of ca. 31 mS·cm -1 at 70 °C, 95% RH. The membrane with the piperidinium cation was the most chemically stable when immersed in 1 M KOH at 80 °C (with only 16% degradation after 14 days) compared to all the other cation functionalized membranes studied here. Photo-crosslinking with 1,10-decanedithiol (DT) eliminated the melting behavior of the polycyclooctene black and improved the mechanical stability of the films allowing < 20 μm large area transparent membranes to be produced. The DT cross-linking reduced the membrane swelling on all length scales as shown by small angle X-ray scattering, water uptake, and dimensional swellingmore » data, and allowed the membrane to be fully intact even at fully hydrated states based on the tensile strength measurements.« less

Authors:
; ; ; ; ; ; ; ; ORCiD logo; ; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); US Army Research Office (ARO)
OSTI Identifier:
1477180
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Solid State Ionics
Additional Journal Information:
Journal Volume: 316; Journal Issue: C; Journal ID: ISSN 0167-2738
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
ABA triblock polymer; Anion exchange membrane; Cross-linked polymer; Hydroxide conductivity; Stable cations

Citation Formats

Liu, Ye, Pandey, Tara P., Sarode, Himanshu N., Kuo, Mei-Chen, Zhang, Wenxu, Gupta, Rohit, Galioto, Samuel, Ozioko, Amobi G., Seifert, Soenke, Liberatore, Matthew W., Coughlin, E. Bryan, and Herring, Andrew M. Thin, robust, and chemically stable photo-cross-linked anion exchange membranes based on a polychlorostyrene-b-polycyclooctene-b-polychlorostyrene ABA triblock polymer. United States: N. p., 2018. Web. doi:10.1016/j.ssi.2017.12.031.
Liu, Ye, Pandey, Tara P., Sarode, Himanshu N., Kuo, Mei-Chen, Zhang, Wenxu, Gupta, Rohit, Galioto, Samuel, Ozioko, Amobi G., Seifert, Soenke, Liberatore, Matthew W., Coughlin, E. Bryan, & Herring, Andrew M. Thin, robust, and chemically stable photo-cross-linked anion exchange membranes based on a polychlorostyrene-b-polycyclooctene-b-polychlorostyrene ABA triblock polymer. United States. doi:10.1016/j.ssi.2017.12.031.
Liu, Ye, Pandey, Tara P., Sarode, Himanshu N., Kuo, Mei-Chen, Zhang, Wenxu, Gupta, Rohit, Galioto, Samuel, Ozioko, Amobi G., Seifert, Soenke, Liberatore, Matthew W., Coughlin, E. Bryan, and Herring, Andrew M. Thu . "Thin, robust, and chemically stable photo-cross-linked anion exchange membranes based on a polychlorostyrene-b-polycyclooctene-b-polychlorostyrene ABA triblock polymer". United States. doi:10.1016/j.ssi.2017.12.031.
@article{osti_1477180,
title = {Thin, robust, and chemically stable photo-cross-linked anion exchange membranes based on a polychlorostyrene-b-polycyclooctene-b-polychlorostyrene ABA triblock polymer},
author = {Liu, Ye and Pandey, Tara P. and Sarode, Himanshu N. and Kuo, Mei-Chen and Zhang, Wenxu and Gupta, Rohit and Galioto, Samuel and Ozioko, Amobi G. and Seifert, Soenke and Liberatore, Matthew W. and Coughlin, E. Bryan and Herring, Andrew M.},
abstractNote = {A polychloromethylstyrene-b-polypolycyclooctene-b-polychloromethylstyrene ABA triblock polymer was used as a backbone in a study to produce a chemically and mechanically robust anion exchange membrane (AEM). The material is easily scalable and the polypolycyclooctene segment (low Tm) makes the membrane flexible to handle. Comparison of the non-crosslinked triblock polymer functionalized with different cations namely; piperidinium, pyrrolidinium, tris(2,4,6-trimethoxyphenyl) phosphonium, and the benchmark trimethylammonium cation showed that the piperidinium functionalized membrane with an ionic exchange capacity of ca. 1.36 mmol.g-1 had the highest OH- conductivity ca. 95 mS·cm-1 at 80 °C, 95% RH, and the highest Cl- conductivity of ca. 31 mS·cm-1 at 70 °C, 95% RH. The membrane with the piperidinium cation was the most chemically stable when immersed in 1 M KOH at 80 °C (with only 16% degradation after 14 days) compared to all the other cation functionalized membranes studied here. Photo-crosslinking with 1,10-decanedithiol (DT) eliminated the melting behavior of the polycyclooctene black and improved the mechanical stability of the films allowing < 20 μm large area transparent membranes to be produced. The DT cross-linking reduced the membrane swelling on all length scales as shown by small angle X-ray scattering, water uptake, and dimensional swelling data, and allowed the membrane to be fully intact even at fully hydrated states based on the tensile strength measurements.},
doi = {10.1016/j.ssi.2017.12.031},
journal = {Solid State Ionics},
issn = {0167-2738},
number = C,
volume = 316,
place = {United States},
year = {2018},
month = {3}
}