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Porous polymers prepared via high internal phase emulsion polymerization for reversible CO2 capture |
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| Authors: | Hongkun He Wenwen Li Melissa Lamson Mingjiang Zhong Dominik Konkolewicz Chin Ming Hui Karin Yaccato Timothy Rappold Glenn Sugar Nathaniel E. David Krishnan Damodaran Sittichai Natesakhawat Hunaid Nulwala Krzysztof Matyjaszewski |
| Affiliation: | 1. Center for Macromolecular Engineering, Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, PA 15213, USA;2. Kilimanjaro Energy, Inc., 630 Tennessee Street, San Francisco, CA 94107, USA;3. Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA;4. National Energy Technology Laboratory, United States Department of Energy, P.O. Box 10940, Pittsburgh, PA 15236, USA;5. Department of Chemical and Petroleum Engineering, University of Pittsburgh, 3700 O''Hara Street, Pittsburgh, PA 15260, USA |
| Abstract: | A series of porous polymers with different pore volumes, pore sizes, and crosslinking densities were synthesized by high internal phase emulsion (HIPE) polymerization. The crosslinked polymerized HIPEs (polyHIPEs) were formed by the copolymerization of 4-vinylbenzyl chloride and divinylbenzene using water droplets in conventional or Pickering HIPEs as the templates. These porous materials were further modified by quaternization and ion exchange to introduce quaternary ammonium hydroxide groups. The resulting polyHIPEs were utilized as sorbents for reversible CO2 capture from air using the humidity swing. The effect of pore structure on the CO2 adsorption and desorption processes was studied. The polyHIPEs containing large pores and interconnected porous structures showed improved swing sizes and faster adsorption/desorption kinetics of CO2 compared to a commercial Excellion membrane with similar functional groups. |
| Keywords: | Porous polymers PolyHIPEs CO2 capture |
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