Poly(ionic liquid)s Nanoparticles Applied in CO₂ Capture

Abstract

Summary The development of new materials for CO2 capture and processing is an urgent issue for greenhouse gas reduction solution. In this context, ionic liquids (ILs) represent a friendly alternative based on their properties including negligible vapor pressure and the fact that they can be reused. Application of ILs in this area have been under study in the last years, in this research poly(ionic liquid)s (PILs) were synthesized from polyurethane (PU) and the ionic liquid 1‐butyl‐3‐methylimidazole chloride [BMIM] [Cl] using different kind of chain extenders; reaction products were structural, thermal and morphologically characterized. From PILs a variety of microparticles and nanoparticles (NP) were obtained by multiple emulsification steps followed by solvent evaporation. By using this methodology different parameters were studied including: the concentration and type of surfactant, the type of organic solvent, and the drying process. Obtained materials were tested for CO2 capture process by using a magnetic suspension balance at 25°C and 4 bar for about 12 h. The synthesized PILs showed improved capacity for CO2 capture than the pure LI [BMIM] [Cl]. Additionally, some of prepared NPs showed faster rates of CO2 adsorption. Therefore, PILs and their NPs under consideration in this study are potential materials for CO2 capture process.

Hybrid Alkoxysilane-Functionalized Urethane-Imide-Based Poly(ionic liquids) as a New Platform for Carbon Dioxide Capture

“…PILs represent an emerging class of the polyelectrolyte species consisting of the RTIL monomers. ,,− These polymers constitute a new, more versatile platform giving rise to a variety of high-performance sorbents. ,,,,,,,, PILs combine useful features of RTILs, e.g., tunability, ,, with mechanical stability, processability, and allow for adjustable macromolecular design of polymers. ,,,,, CO 2 sorption and desorption in PILs are completely reversible and occur more quickly than in conventional RTILs. , PILs synthesis is conducted via two general procedures. The first one is a direct polymerization of the RTIL monomers. , In turn, the second one involves condensation reactions and/or polymer modification. , Polycondensation and modification of the existing polymers is more attractive because it utilizes commercially available polymers of high molecular weight. , A few successful PILs for CO 2 capture were synthesized by this procedure: polyurethane (PU), − polybenzimidazoles, , cellulosic, and polyimides . Multiple factors affect CO 2 solubility in PILs, e.g., ion structure, alkyl chain length, molecular weight, electron density distribution, moisture, and polymeric macrostructure. , …”

“…We have recently reported synthesis of cationic and anionic PU-based PILs introducing different cations imidazolium, phosphonium, and ammonium families. − The highest CO 2 sorption capacity was attained for anionic polyurethane using tetrabutylammonium (16.1 mg CO 2 /g at 0.82 bar and 303.15 K) as cation. This compound exhibited a weak cation–anion coordination along with a superior CO 2 sorption, as compared to other PILs.…”

Charge transport and glassy dynamics in polymeric ionic liquids as reflected by their inter- and intramolecular interactions

“…Polymeric ionic liquids (PILs) have been developed with the primary intention to establish a novel class of potential electrolyte materials for multifold applications, such as power-storage devices or CO 2 absorption appliances. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] With the evolution of these modern materials Hiroyuki Ohno and coworkers pioneered the strategy of incorporating outstanding properties of ILs (e.g. wide electrochemical and thermal window, negligible vapour pressure and non-flammability; but foremost high ionic conductivity) into mechanically stable polymeric systems by polymerization.…”

Sorção De Co2 Utilizando Líquido Iônico Aditivado Com Extensores De Área Superficial

“…Estas tecnologias se baseiam nos princípios de absorção química ou física, de adsorção física, de destilação criogênica ou de membranas. [7][8][9][10][11] Os líquidos iônicos (sais orgânicos constituídos por um cátion orgânico e um ânion que pode ser orgânico ou inorgânico, comumente líquidos à temperatura ambiente, com baixo ponto de fusão e alto ponto de ebulição), apesar de serem conhecidos desde o início do século passado, [12][13][14] ainda despertam interesse na academia e na indústria por suas características singulares que lhe conferem uma gama de propriedades físicas e químicas.…”