Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation
Abstract
Abstract As energy needs continue to drive the development of biogas and fossil‐fuel technologies, methods by which to selectively remove basic (NH 3 ) and acidic (CO 2 ) gases are becoming increasingly important, especially in light of global climate change. Block copolymers are considered as suitable membrane candidates in gas separations due to the ability of such copolymers to microphase‐separate and spontaneously form nanoscale morphologies that exhibit spatially modulated chemical specificity. Incorporation of charged moieties along the midblock of a thermoplastic elastomeric multiblock copolymer yields an amphiphilic block ionomer possessing a flexible molecular network stabilized by rigid endblocks. The presence of hydrophilic microdomains introduces an important consideration regulating molecular transport: humidity. In this study, solvent‐templating paradigms are employed to control the morphologies of midblock‐sulfonated pentablock ionomers, as discerned by electron microscopy and X‐ray scattering. The effect of humidity on the permeation of NH 3 , CO 2 , and N 2 is then investigated through the resulting membranes. As expected, NH 3 permeates significantly faster than N 2 , especially under humid conditions. Although not as pronounced, similar behavior is observed for CO 2 , thereby establishing that this block ionomer is generally selective to humidified polar gases.
- Authors:
-
- Department of Chemical Engineering Norwegian University of Science and Technology Trondheim 7491 Norway
- Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA
- Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA
- Department of Materials Science and Engineering North Carolina State University Raleigh NC 27695 USA, Department of Chemical and Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1389904
- Grant/Contract Number:
- DE‐AC02‐06CH11357
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Materials Interfaces
- Additional Journal Information:
- Journal Name: Advanced Materials Interfaces Journal Volume: 4 Journal Issue: 22; Journal ID: ISSN 2196-7350
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Ansaloni, Luca, Dai, Zhongde, Ryan, Justin J., Mineart, Kenneth P., Yu, Qiang, Saud, Keara T., Hägg, May‐Britt, Spontak, Richard J., and Deng, Liyuan. Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation. Germany: N. p., 2017.
Web. doi:10.1002/admi.201700854.
Ansaloni, Luca, Dai, Zhongde, Ryan, Justin J., Mineart, Kenneth P., Yu, Qiang, Saud, Keara T., Hägg, May‐Britt, Spontak, Richard J., & Deng, Liyuan. Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation. Germany. https://doi.org/10.1002/admi.201700854
Ansaloni, Luca, Dai, Zhongde, Ryan, Justin J., Mineart, Kenneth P., Yu, Qiang, Saud, Keara T., Hägg, May‐Britt, Spontak, Richard J., and Deng, Liyuan. Wed .
"Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation". Germany. https://doi.org/10.1002/admi.201700854.
@article{osti_1389904,
title = {Solvent‐Templated Block Ionomers for Base‐ and Acid‐Gas Separations: Effect of Humidity on Ammonia and Carbon Dioxide Permeation},
author = {Ansaloni, Luca and Dai, Zhongde and Ryan, Justin J. and Mineart, Kenneth P. and Yu, Qiang and Saud, Keara T. and Hägg, May‐Britt and Spontak, Richard J. and Deng, Liyuan},
abstractNote = {Abstract As energy needs continue to drive the development of biogas and fossil‐fuel technologies, methods by which to selectively remove basic (NH 3 ) and acidic (CO 2 ) gases are becoming increasingly important, especially in light of global climate change. Block copolymers are considered as suitable membrane candidates in gas separations due to the ability of such copolymers to microphase‐separate and spontaneously form nanoscale morphologies that exhibit spatially modulated chemical specificity. Incorporation of charged moieties along the midblock of a thermoplastic elastomeric multiblock copolymer yields an amphiphilic block ionomer possessing a flexible molecular network stabilized by rigid endblocks. The presence of hydrophilic microdomains introduces an important consideration regulating molecular transport: humidity. In this study, solvent‐templating paradigms are employed to control the morphologies of midblock‐sulfonated pentablock ionomers, as discerned by electron microscopy and X‐ray scattering. The effect of humidity on the permeation of NH 3 , CO 2 , and N 2 is then investigated through the resulting membranes. As expected, NH 3 permeates significantly faster than N 2 , especially under humid conditions. Although not as pronounced, similar behavior is observed for CO 2 , thereby establishing that this block ionomer is generally selective to humidified polar gases.},
doi = {10.1002/admi.201700854},
journal = {Advanced Materials Interfaces},
number = 22,
volume = 4,
place = {Germany},
year = {Wed Sep 13 00:00:00 EDT 2017},
month = {Wed Sep 13 00:00:00 EDT 2017}
}
https://doi.org/10.1002/admi.201700854
Web of Science
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