Journal
ISCIENCE
Volume 25, Issue 10, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.isci.2022.105091
Keywords
-
Categories
Funding
- National Natural Science Foundation of China
- Youth Innovation of University in Shandong Province
- [51974346]
- [U20B6003]
- [2019KJH002]
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In this study, a CO2-switchable foam was synthesized by adding hydrophilic nanoparticles to the foaming agent, resulting in improved stability and longer half-life. This research is significant for future CO2 foam research and applications in energy and environmental practices.
CO2-responsive foaming has been drawing huge attention due to its unique switching characteristics in academic research and industrial practices, whereas its stability remains questionable for further applications. In this paper, a new CO2-switchable foam was synthesized by adding the preferably selected hydrophilic nanoparticle N20 into the foaming agent C(12)A, through a series of analytical experiments. Overall, the synergy between cationic surfactants and nanopar-ticles with a contact angle of 37.83 degrees is the best. More specifically, after adding 1.5 wt% N20, the half-life of foam is 14 times longer than that of pure C(12)A foam. What's more, the C(12)A-N20 solution is validated to own distinctive CO2-N-2 switching features because very slight foaming degradations are observed in terms of the foaming volume and half-life time even after three cycles of CO2-N-2 injections. This study is of paramount importance pertaining to future CO2 foam research and applications in energy and environmental practices.
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