Abstract
To mitigate the effect of atmospheric CO2 on global climate change, gas separation materials that simultaneously exhibit high CO2 permeability and selectivity in gas mixtures must be developed. In this study, CO2 transport through midblock-sulfonated block polymer membranes prepared from four different solvents is investigated. The results presented here establish that membrane morphology and accompanying gas transport properties are sensitive to casting solvent and relative humidity. We likewise report an intriguing observation: submersion of these thermoplastic elastomeric membranes in liquid water, followed by drying prior to analysis, promotes not only a substantial change in membrane morphology, but also a significant improvement in both CO2 permeability and CO2/N2 selectivity. Measured CO2 permeability and CO2/N2 selectivity values of 482 Barrer and 57, respectively, surpass the Robeson upper bound, indicating that these nanostructured membranes constitute promising candidates for gas separation technologies aimed at CO2 capture.
Highlights
Due to their relatively low cost, facile fabrication, and straightforward scale-up, polymer membranes have emerged as a practical alternative to traditional gas separation processes in large-scale industrial applications[1]
We investigate the role of casting solvent on CO2 transport through a novel polymeric material that displays considerable promise for amphoteric gas separation[15]
Upon submersion in liquid water, a TIPA-cast TESET membrane swells beyond 100% at ambient temperature
Summary
Due to their relatively low cost, facile fabrication, and straightforward scale-up, polymer membranes have emerged as a practical alternative to traditional gas separation processes in large-scale industrial applications[1]. The TESET polymer has been previously examined as a CO2 separation membrane, the measured values of both CO2 permeability and CO2/N2 selectivity are unsatisfactorily low (
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
