Gas transport properties of reverse-selective poly(ether-b-amide6)/[Emim][BF4] gel membranes for CO2/light gases separation

Elastic free-standing RTIL composite membranes for CO2/N2 separation based on sphere-forming triblock/diblock copolymer blends

“…[24][25][26][27][28][29],the dense polymer materials have significantly lower CO 2 permeability than composite materials that contain free RTIL. [28,29] Of the few examples ofmembranes based on block copolymer/RTIL blends reported to date [21-23, 28, 29], all involvea shared fabrication strategydependent on solvent-casting of a co-solution of block copolymer and RTIL into a porous support material.Gu et al [21,22]and Rabiee et al [23]report CO 2 /N 2 separation performances of their membranesto be slightly above the 2008 Robeson plot upper bound, showing the potential of block-copolymer-based materials to be used as efficient CO 2 /N 2 separation membrane materials. However, the common disadvantageshared by these systems is the apparent compromise of mechanical integrity with increased RTIL loadings, a strategy used to improve the liquid-like character of the membrane and thus CO 2 permeabilities.…”

“…Recently, composite membranes containing room-temperature ionic liquids (RTILs) have gained attention due to theirhigh CO 2 /N 2 selectivity, high CO 2 permeability, low volatility, and promisingthermal and chemical stability [14].Examples of RTIL-based membrane materialsincludesupported ionic liquid membranes (SILMs) [15], ion gels [16,17],poly(ionic liquid) (poly(IL))/ILcomposites[5, [18][19][20] andblock copolymer/RTIL blends [21][22][23].Recent advances in polymerizing RTIL-containing monomers have also permitted direct incorporation of the ionic species into block copolymer architectures. While these systems offer an intrinsic ability to produce distinct ionic and non-ionic domains through predictable phase separation on the nanometer length scale.…”

Imidazolium‐Based Poly(ionic liquid)/Ionic Liquid Ion‐Gels with High Ionic Conductivity Prepared from a Curable Poly(ionic liquid)

“…Ideally, ion‐gels retain many of the desirable properties of the neat IL such as high ionic conductivity, high gas permeability, and high solubility selectivity for CO 2 over other light gases, while providing a more processable and physically stable material. Ion‐gels have been prepared from the physical gelation of ILs with low‐molecular‐weight organic gelators and polymers such as poly(vinylidene‐ co ‐hexafluoropropylene) (PVDF‐ co ‐HFP) and poly(amide‐ b ‐ethylene oxide) (Pebax); from incorporation with nanostructure‐forming block copolymers (BCPs); and through electrostatic interactions with charged polymers . Potential applications of these materials include gas separation membranes, catalysts and catalyst supports, biomedical materials, and ion‐conductive membranes for electrochemical devices …”

Polysulfone-ionic liquid based membranes for CO2/N2 separation with tunable porous surface features

“…In this case, the IL molecules are trapped inside the polymer matrix and possess higher resistance to pressure differences over the membrane, on account of strong interactions with and mechanical support from the polymer [13]. Only a relatively limited number of publications has so far employed this method in the area of gas separation [13][14][15][16][17][18][19][20][21][22][23][24].…”