Correlating the Macrostructural Variations of an Ion Gel with Its Carbon Dioxide Sorption Capacity

Authors

Tung Nguyen,, University of Nebraska-Lincoln
Mona Bavarian, University of Nebraska - LincolnFollow
Siamak Nejati, University of Nebraska - LincolnFollow

Date of this Version

11-1-2022

Document Type

Article

Citation

Nguyen, T.; Bavarian, M.; Nejati, S. Correlating the Macrostructural Variations of an Ion Gel with Its Carbon Dioxide Sorption Capacity. Membranes 2022, 12, 1087. https://doi.org/10.3390/ membranes12111087

Comments

Open access

Abstract

We report on a direct correlation between the macroscale structural variations and the gas sorption capacities of an ion gel. Here, we chose 1-ethyl-3-methylimidazolium bis(trifluoromethyl sulfonyl)imide ([Emim][TF₂N]) and poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP) as the ionic liquid and host polymer, respectively. The CO₂ sorption in the thin films of the IL-polymer was measured using the gravimetric method. The results of our experiment showed that the trend in CO₂ uptake of these mixtures was nonlinearly correlated with the content of IL. Here, we highlight that the variations in the molecular structure of the polymers were the main reason behind the observed trend. The presented data suggested the possibility of using the composition of mixtures containing IL and polymers to realize a synergistic gain for gas sorption in these mixtures.