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Effects of Hydrophobic Modifications and Phase Transitions of Polyvinylamine Hydrogel Films on Reversible CO 2 Capture Behavior: Comparison between Copolymer Films and Blend Films for Temperature‐Responsive CO 2 Absorption
Author(s) -
Yue Mengchen,
Imai Kenta,
Yamashita Chie,
Miura Yoshiko,
Hoshino Yu
Publication year - 2017
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201600570
Subject(s) - copolymer , polymer , chemical engineering , amine gas treating , materials science , polymer chemistry , self healing hydrogels , aqueous solution , phase (matter) , lower critical solution temperature , chemistry , organic chemistry , composite material , engineering
The separation of CO 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 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 2 absorbent—the films can reversibly capture and release large amount of CO 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 2 capture are tested. The effects of hydrophobic modifications and the temperature dependent phase transition behaviors of the films on the reversible CO 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 2 capture efficiency of polyamine films can be improved just by blending with temperature‐responsive polymers.