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Development of new and improvement of the existing materials for carbon dioxide (CO 2 ) capture is an urgent and significant goal for emission reduction. We hereby report synthesis of hybrid urethane-imide-based poly-ILs (HPILs) and their CO 2 capture capacities. The synthesized HPILs were characterized by Fourier transform infred (FTIR), nuclear magnetic resonance (NMR), differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMTA), atomic force microscopy (AFM). CO 2 physisorption and reusability were assessed by the pressure-decay technique at a few conditions. Density functional theory calculations were used to identify binding energies between CO 2 and each center of HPILs. Cations of HPILs play an important role in CO 2 physisorption. The impact of the silane content was found to be relatively insignificant. Weakly coordinating cations foster better CO 2 sorption. The best performances were obtained for the tetrabutylammonium-based HPILs (33.1 mg/g in HPIL-02-TBA and 31.7 mg/g in HPIL-06-TBA at 303.15 K and 0.82 bar). HPIL-02-TBA possesses the highest CO 2 sorption capacity out of all reported poly(ionic liquids) thus far and exhibits interesting thermal stability and competitive mechanical properties. Application of HPIL-02-TBA will lead to more robust CO 2 capturing setups.

CO 2 SORPTION USING IONIC LIQUID ADDITIVATED WITH SURFACE AREA EXTENDERS. The study of environmentally friendly CO 2 sorption agents are growing due to the need of mitigate this gas from atmosphere. Ionic Liquids (ILs) present the advantage of having low vapor pressures and being chemically and thermally stable. Besides, their properties can be designed by varying the groups of the cation or anion. Yet, these compounds present a lower desorption energy when compared to amines based chemical solvents. These characteristics make ILs potentially important for the development of new processes focused on the mitigation of global warming. However, ILs have high viscosity and high cost, making them economically unfeasible. To minimize these problems, bubble glass can be used as an additive in ionic liquids to reduce cost and viscosity. Bubble glass has several applications in industry, presenting low cost and high chemical and mechanical resistance. This work evaluated the CO 2 solubility in [bmim][BF 4 ] and [mbmim][Tf 2 N] pure and mixed with boron silicate bubble glass in volumetric concentrations of 5% to 50%. Data are reported at 27 bar of pressure and temperatures of 303 and 323 K. Mixed systems with 50% concentration of bubble glass showed the best sorption results for both ionic liquids.