New water-based nanocapsules of poly(diallyldimethylammonium tetrafluoroborate)/ionic liquid for CO2 capture
Bárbara B. Polesso, Rafael Duczinski, Franciele L. Bernard, Douglas J. Faria, Leonardo Moreira dos Santos, Sandra Einloft
Abstract
Encapsulated ionic liquids as green solvents for CO 2 capture are reported in this work. We present a novel combination of water-based poly(ionic liquid) and imidazolium-based ionic liquids (Emim[X]). Poly(diallyldimethylammonium tetrafluoroborate)/Emim[X] capsules were developed for the first time using Nano Spray Dryer B-90. Capsules were characterized by FTIR, SEM/EDX, TEM, TGA, DSC, CO 2 sorption, and CO 2 /N 2 selectivity, CO 2 sorption kinetic and recycling were also demonstrated. Comparing the capsules reported in this work, the combination of poly(diallyldimethylammonium tetrafluoroborate) and the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate (P[DADMA]/BF 4 ) showed great potential for CO 2 capture and CO 2 /N 2 separation, providing higher results (53.4 mg CO 2 /g; CO 2 /N 2 selectivity: 4.58).