Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 23, Issue 5, Pages 835-840Publisher
WILEY
DOI: 10.1002/pat.1973
Keywords
functional ionic liquids; poly(ionic liquid)s; condensation polymerization; CO2 sorption
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Funding
- National Natural Science Foundation of China [20804031]
- Natural Science Foundation of Gansu Province [2007GS03612]
- Ministry of Education in China [207120]
- Foundation of Key Laboratory of Polymer Materials of Gansu Province
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The development of novel materials for carbon dioxide (CO2) capture is of great importance in resource utilization and environmental preservation. In this study, imidazolium-based ionic liquids (ILs) with symmetrical ester and hydroxyl groups were prepared, and their corresponding polymer were synthesized by melt condensation polymerization. The structure and properties of the poly(ionic liquid)s (PILs) were characterized by proton nuclear magnetic resonance, gel permeation chromatograph, differential scanning calorimetry, X-ray diffraction, and scanning electron microscopy. In addition, the CO2 sorption behavior of the IL monomers and PILs were studied at a low pressure (648.4 mmHg CO2) and under a temperature of 25 degrees C using a thermogravimetric analyzer. The CO2 sorption capacity of 1,3-bis(2-hydroxyl ethyl)-imidazolium hexafluorophosphate ([HHIm]PF6, 10 mol%) was the highest among all the IL monomers and PILs studied. This capacity is also much higher than those reflected of previously reported ILs. Moreover, the sorption equilibrium of [HHIm]PF6 was achieved within a short time. Copyright (C) 2011 John Wiley & Sons, Ltd.
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