Effects of Hydrophobic Modifications and Phase Transitions of Polyvinylamine Hydrogel Films on Reversible CO sub(2) Capture Behavior: Comparison between Copolymer Films and Blend Films for Temperature-Responsive CO sub(2) Absorption

The separation of CO sub(2) from large emission sources is essential to both mitigate the greenhouse effect, as well as generate carbon-based energy. However, energy consumption of conventional CO sub(2) separation processes, which using aqueous amine solution as absorbent, is too large. It is has b...

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Bibliographic Details
Published in:Macromolecular chemistry and physics 2017-04, Vol.218 (8), p.np-np
Main Authors: Yue, Mengchen, Imai, Kenta, Yamashita, Chie, Miura, Yoshiko, Hoshino, Yu
Format: Article
Language:English
Subjects:
Absorbents
Carbon capture and storage
Carbon dioxide
Copolymers
Efficiency
Hydrogels
Phase transformations
Separation
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Summary:The separation of CO sub(2) from large emission sources is essential to both mitigate the greenhouse effect, as well as generate carbon-based energy. However, energy consumption of conventional CO sub(2) separation processes, which using aqueous amine solution as absorbent, is too large. It is has been previously reported that hydrogel films that are consisting of temperature-responsive amine-containing polymers can be energy efficient CO sub(2) absorbent-the films can reversibly capture and release large amount of CO sub(2) via temperature-induced phase transition of hydrogels. However, the study is limited to the films consisting of gel particles of polyacrylamides. In this study, a series of hydrogel films consisting of a mass-produced amine-containing linear polymer, polyvinyl amine (PVAm), are prepared, and the efficiencies of their reversible CO sub(2) capture are tested. The effects of hydrophobic modifications and the temperature dependent phase transition behaviors of the films on the reversible CO sub(2) capture efficiency are studied in detail. The function of hydrogel films containing modified PVAm (copolymers), as well as blend films of nonmodified PVAm and 100% modified PVAm, are compared for the first time. The results reveal that the reversible CO sub(2) capture efficiency of polyamine films can be improved just by blending with temperature-responsive polymers. The behaviors of polyvinylamine-based blended and copolymer hydrogel films are compared as temperature-responsive CO sub(2) absorbents. The phase transitions of polymer chains in the film improve reversible CO sub(2) capture efficiency both in the blended and copolymer films.
ISSN:1022-1352
1521-3935
DOI:10.1002/macp.201600570