Ionic liquid polymer materials with tunable nanopores controlled by surfactant aggregates: a novel approach for CO2 capture. Issue 30 (21st July 2020)

• Record Type: Journal Article
• Authors: Bhaskar Reddy, Ambavaram Vijaya; Moniruzzaman, Muhammad; Bustam, Mohamad A.; Goto, Masahiro; Saha, Bidyut B.; Janiak, Christoph
• Is Part Of: Journal of materials chemistry. Volume 8:Issue 30(2020)
• Page Start: 15034
• Page End: 15041
• Publication Date: 2020-07-21
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9ta13077b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Micelles are formed using a CO2 -philic surfactant ( N -ethyl perfluorooctyl sulfonamide) and embedded in in situ formed polymeric materials (SMI-ILPs) to enhance CO2 sorption. Abstract : Monomeric ionic liquids (ILs), ionic liquid polymers (ILPs) and IL-based composites have emerged as potential materials for CO2 capture owing to their exceptional intrinsic physical solubility of CO2 . This study reports the development of novel IL polymer materials incorporating CO2 -philic tunable nanopores and their subsequent utilization for CO2 capture. In this approach, primarily, micelles were formed in monomeric IL 1-vinyl-3-ethylimidazolium bis(trifluoromethylsulfonyl)imide using a CO2 -philic surfactant ( N -ethyl perfluorooctyl sulfonamide) through self-assembly, from which polymeric materials were fabricated via free radical polymerization. The CO2 adsorption studies demonstrated 3-fold enhancements for the surfactant micelle incorporated IL polymers (SMI-ILPs) compared to their bare IL polymers. The SMI-ILPs were regenerated by simply heating at 70 °C and reused for 15 cycles with a retention of over 96% of CO2 uptake capacity. The simple recovery and notable enhancements in CO2 sorption of novel SMI-ILPs were traced to the adsorption of CO2 at the (i) highly porous IL-based polymeric networks, and (ii) nanometer sized apolar pores made by CO2 -philic surfactant tails. This work will open up new possibilities for the development of IL based smart materials for CO2 capture and separation.