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Title: Anion exchange membranes composed of a poly(2,6-dimethyl-1,4-phenylene oxide) random copolymer functionalized with a bulky phosphonium cation

Abstract

A random copolymer, tris(2,4,6-trimethoxyphenyl) phosphonium functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (PPO-TPQP) was cast from three different solvents: dimethyl sulfoxide (DMSO), ethyl lactate, or a 41:59 vol% mixture of DMSO and ethyl lactate. Solvents were selected via analysis of the Hansen solubility parameters to vary the phase separation of the polymer in the films. An optimized mixture of DMSO and ethyl lactate chosen for film fabrication and this film was contrasted with films cast from the neat constituent solvents. Atomic force microscopy identified domains from nanometer to tens of nanometer sizes, while the light microscopy showed features on the order of micron. SAXS revealed a cation scattering peak with a d-spacing from 7 to 15 . Trends in conductivity and water diffusion for the membranes vary depending on the solvent from which they are cast. The mixed solvent cast membrane shows a linear Arrhenius behavior indicating fully dissociated cationic/anionic groups, and has the highest bromide conductivity of 3 mS/cm at 95% RH, 90 °C. The ethyl lactate cast membrane shows a linear Arrhenius relation in conductivity, but a Vogel-Tamman-Fulcher behavior in its water self-diffusion. While water increases bromide dissociation, water and bromide transport in these films seems to be decoupled. Lastly, this ismore » particularly true for the film cast from ethyl lactate.« less

Authors:
 [1];  [2];  [1];  [1];  [3];  [2];  [1];  [4];  [1]
  1. Colorado School of Mines, Golden, CO (United States)
  2. Univ. of Delaware, Newark, DE (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Toledo, Toledo, OH (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE; U.S. Army Research Laboratory (USARL), US Army Research Office (ARO)
OSTI Identifier:
1367274
Alternate Identifier(s):
OSTI ID: 1359545
Grant/Contract Number:  
AC02-06CH11357; W911NF-10-1-0520
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Membrane Science
Additional Journal Information:
Journal Volume: 506; Journal Issue: C; Journal ID: ISSN 0376-7388
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; anion exchange membrane; Hansen solubility parameter; ionic conductivity; morphology; water transport

Citation Formats

Liu, Ye, Zhang, Bingzi, Kinsinger, Corey L., Yang, Yuan, Seifert, Soenke, Yan, Yushan, Maupin, C. Mark, Liberatore, Matthew W., and Herring, Andrew M. Anion exchange membranes composed of a poly(2,6-dimethyl-1,4-phenylene oxide) random copolymer functionalized with a bulky phosphonium cation. United States: N. p., 2016. Web. doi:10.1016/j.memsci.2016.01.042.
Liu, Ye, Zhang, Bingzi, Kinsinger, Corey L., Yang, Yuan, Seifert, Soenke, Yan, Yushan, Maupin, C. Mark, Liberatore, Matthew W., & Herring, Andrew M. Anion exchange membranes composed of a poly(2,6-dimethyl-1,4-phenylene oxide) random copolymer functionalized with a bulky phosphonium cation. United States. https://doi.org/10.1016/j.memsci.2016.01.042
Liu, Ye, Zhang, Bingzi, Kinsinger, Corey L., Yang, Yuan, Seifert, Soenke, Yan, Yushan, Maupin, C. Mark, Liberatore, Matthew W., and Herring, Andrew M. Fri . "Anion exchange membranes composed of a poly(2,6-dimethyl-1,4-phenylene oxide) random copolymer functionalized with a bulky phosphonium cation". United States. https://doi.org/10.1016/j.memsci.2016.01.042. https://www.osti.gov/servlets/purl/1367274.
@article{osti_1367274,
title = {Anion exchange membranes composed of a poly(2,6-dimethyl-1,4-phenylene oxide) random copolymer functionalized with a bulky phosphonium cation},
author = {Liu, Ye and Zhang, Bingzi and Kinsinger, Corey L. and Yang, Yuan and Seifert, Soenke and Yan, Yushan and Maupin, C. Mark and Liberatore, Matthew W. and Herring, Andrew M.},
abstractNote = {A random copolymer, tris(2,4,6-trimethoxyphenyl) phosphonium functionalized poly(2,6-dimethyl-1,4-phenylene oxide) (PPO-TPQP) was cast from three different solvents: dimethyl sulfoxide (DMSO), ethyl lactate, or a 41:59 vol% mixture of DMSO and ethyl lactate. Solvents were selected via analysis of the Hansen solubility parameters to vary the phase separation of the polymer in the films. An optimized mixture of DMSO and ethyl lactate chosen for film fabrication and this film was contrasted with films cast from the neat constituent solvents. Atomic force microscopy identified domains from nanometer to tens of nanometer sizes, while the light microscopy showed features on the order of micron. SAXS revealed a cation scattering peak with a d-spacing from 7 to 15 Å. Trends in conductivity and water diffusion for the membranes vary depending on the solvent from which they are cast. The mixed solvent cast membrane shows a linear Arrhenius behavior indicating fully dissociated cationic/anionic groups, and has the highest bromide conductivity of 3 mS/cm at 95% RH, 90 °C. The ethyl lactate cast membrane shows a linear Arrhenius relation in conductivity, but a Vogel-Tamman-Fulcher behavior in its water self-diffusion. While water increases bromide dissociation, water and bromide transport in these films seems to be decoupled. Lastly, this is particularly true for the film cast from ethyl lactate.},
doi = {10.1016/j.memsci.2016.01.042},
journal = {Journal of Membrane Science},
number = C,
volume = 506,
place = {United States},
year = {Fri Jan 22 00:00:00 EST 2016},
month = {Fri Jan 22 00:00:00 EST 2016}
}

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