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Title: The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane

Abstract

Ionic liquid gels of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide plasticizing a cross-linked poly(ethylene oxide) are high performance CO2 separation membranes. Here, the effect of polymer cross-link density on the ionic liquid stability, on the mechanical properties of the resulting films, and on the gas separation properties were studied. Cross-link density was modified by changing the chain length of ethoxylated diacrylate and triacrylate monomers, and by incorporating small amounts of short, multifunctional acrylate monomers. Without the ionic liquid acting as permanent plasticizer, higher cross-link density is associated with higher yield strength but lower strain at break, as expected. In a plasticized network, however, the loss in flexibility is not accompanied by higher yield strength, leaving ion gels made from highly cross-linked network more fragile than those having longer, more flexible chains. In conclusion, lowering cross-link density also allowed more ionic liquids to be incorporated as a phase stable gel and led to better CO2 separation performance.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [3]
  1. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States); Leidos Research Support Team, Pittsburgh, PA (United States)
  2. Yale Univ., New Haven, CT (United States)
  3. National Energy Technology Lab. (NETL), Pittsburgh, PA (United States)
Publication Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Org.:
USDOE Office of Fossil Energy (FE)
OSTI Identifier:
1607770
Alternate Identifier(s):
OSTI ID: 1545641
Grant/Contract Number:  
89243318CFE000003
Resource Type:
Accepted Manuscript
Journal Name:
Polymer
Additional Journal Information:
Journal Volume: 180; Journal Issue: C; Journal ID: ISSN 0032-3861
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Kusuma, Victor A., Chen, Christina, Baker, James S., Macala, Megan K., and Hopkinson, David. The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane. United States: N. p., 2019. Web. doi:10.1016/j.polymer.2019.121666.
Kusuma, Victor A., Chen, Christina, Baker, James S., Macala, Megan K., & Hopkinson, David. The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane. United States. https://doi.org/10.1016/j.polymer.2019.121666
Kusuma, Victor A., Chen, Christina, Baker, James S., Macala, Megan K., and Hopkinson, David. Sun . "The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane". United States. https://doi.org/10.1016/j.polymer.2019.121666. https://www.osti.gov/servlets/purl/1607770.
@article{osti_1607770,
title = {The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane},
author = {Kusuma, Victor A. and Chen, Christina and Baker, James S. and Macala, Megan K. and Hopkinson, David},
abstractNote = {Ionic liquid gels of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide plasticizing a cross-linked poly(ethylene oxide) are high performance CO2 separation membranes. Here, the effect of polymer cross-link density on the ionic liquid stability, on the mechanical properties of the resulting films, and on the gas separation properties were studied. Cross-link density was modified by changing the chain length of ethoxylated diacrylate and triacrylate monomers, and by incorporating small amounts of short, multifunctional acrylate monomers. Without the ionic liquid acting as permanent plasticizer, higher cross-link density is associated with higher yield strength but lower strain at break, as expected. In a plasticized network, however, the loss in flexibility is not accompanied by higher yield strength, leaving ion gels made from highly cross-linked network more fragile than those having longer, more flexible chains. In conclusion, lowering cross-link density also allowed more ionic liquids to be incorporated as a phase stable gel and led to better CO2 separation performance.},
doi = {10.1016/j.polymer.2019.121666},
journal = {Polymer},
number = C,
volume = 180,
place = {United States},
year = {Sun Jul 21 00:00:00 EDT 2019},
month = {Sun Jul 21 00:00:00 EDT 2019}
}

Journal Article:

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Cited by: 14 works
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Figures / Tables:

Table 1 Table 1: Chemical structure of all monomers in this study.

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Works referenced in this record:

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