Phosphonium-based poly(Ionic liquid) membranes: The effect of cation alkyl chain length on light gas separation properties and Ionic conductivity

Cowan, Matthew G.; Masuda, Miyuki; McDanel, William M.; Kohno, Yuki; Gin, Douglas L.; Noble, Richard D.

doi:10.1016/j.memsci.2015.10.019

Cited by 73 publications

(39 citation statements)

References 29 publications

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“…Therefore, the combination of the two materials did not meet the expectation of improving CO 2 separation processes. In particular, the performances of the membrane containing 60 wt.% of PEVI-DEP were fully controlled by the PIL and were very similar to those of other PIL and PIL/IL based membranes [5,22,[53][54][55][56]. However, especially in CO 2 /N 2 separation, Pebax ® 1657/60 wt.% PEVI-DEP composite membrane is more selective than other PIL and PIL/IL membranes.…”

Section: Robeson Plots and Correlationssupporting

confidence: 58%

“…These pieces of evidence indicate that CO 2 /CH 4 and CO 2 /N 2 separations are mostly favored by the presence of Pebax ® 1657. By contrast, H 2 /CH 4 separation ( Figure 6 c) benefited from the addition of PEVI-DEP, showing an increase of selectivity and H 2 permeability, which take Pebax ® 1657/PEVI-DEP samples closer to the performance of recently reported phosphonium-based PILs [ 55 ]. For H 2 /CO 2 separation ( Figure 6 e) a trend that moves towards an inversion of selectivity was observed.…”

Section: Resultsmentioning

confidence: 85%

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Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Mazzei

Nikolaeva²,

Fuoco

et al. 2020

Membranes

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Poly(ionic liquid)s are an innovative class of materials with promising properties in gas separation processes that can be used to boost the neat polymer performances. Nevertheless, some of their properties such as stability and mechanical strength have to be improved to render them suitable as materials for industrial applications. This work explored, on the one hand, the possibility to improve gas transport and separation properties of the block copolymer Pebax® 1657 by blending it with poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate (PEVI-DEP). On the other hand, Pebax® 1657 served as a support for the PIL and provided mechanical resistance to the samples. Pebax® 1657/PEVI-DEP composite membranes containing 20, 40, and 60 wt.% of PEVI-DEP were cast from solutions of the right proportion of the two polymers in a water/ethanol mixture. The PEVI-DEP content affected both the morphology of the dense membranes and gas transport through the membranes. These changes were revealed by scanning electron microscopy (SEM), time-lag, and gravimetric sorption measurements. Pebax® 1657 and PEVI-DEP showed similar affinity towards CO2, and its uptake or solubility was not influenced by the amount of PIL in the membrane. Therefore, the addition of the PIL did not lead to improvements in the separation of CO2 from other gases. Importantly, PEVI-DEP (40 wt.%) incorporation affected and improved permeability and selectivity by more than 50% especially for the separation of light gases, e.g., H2/CH4 and H2/CO2, but higher PEVI-DEP concentrations lead to a decline in the transport properties.

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Section: Robeson Plots and Correlationssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 85%

Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Mazzei

Nikolaeva²,

Fuoco

et al. 2020

Membranes

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“…[23][24][25][26] PILs are ionically conductive and their CO 2 adsorption capacity is between 2a nd 20 mg g À1 ,which is higher than their IL counterparts. [2,[27][28][29][30][31] Managing carbon dioxide (CO 2 )r eleased from large-scale industrialp rocesses is of great importance,y et there remain significant technical challenges.H erein, the fabrication of 1mm-thicks olid-state electrochemical devices based on poly-(ionic liquid) ionogels with embedded electrodes capable of both adsorption and electrochemical reduction of CO 2 is reported.T he ionogelsa re prepared via radical polymerization and chemical crosslinking of avinyl imidazolium trifluoromethanesulfonimide ionic liquid monomer in the presence of additional ionic liquids (ILs) that act as swellinga gents and enhance ionic conductivity. Thee ffects of the ILs concentration and the degree of crosslinking on the mechanical prop-erties,c onductivity,a nd CO 2 adsorption of the ionogels are investigated.…”

Section: Introductionmentioning

confidence: 99%

Solid‐State Poly(ionic liquid) Gels for Simultaneous CO₂ Adsorption and Electrochemical Reduction

et al. 2018

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Managing carbon dioxide (CO2) released from large‐scale industrial processes is of great importance, yet there remain significant technical challenges. Herein, the fabrication of 1‐mm‐thick solid‐state electrochemical devices based on poly(ionic liquid) ionogels with embedded electrodes capable of both adsorption and electrochemical reduction of CO2 is reported. The ionogels are prepared via radical polymerization and chemical crosslinking of a vinyl imidazolium trifluoromethanesulfonimide ionic liquid monomer in the presence of additional ionic liquids (ILs) that act as swelling agents and enhance ionic conductivity. The effects of the ILs concentration and the degree of crosslinking on the mechanical properties, conductivity, and CO2 adsorption of the ionogels are investigated. The ionogels are shown to have ionic conductivities as high as 0.6 mS cm−1. The results of quartz crystal microbalance analyses demonstrates that the CO2 adsorption of the ionogels reaches up to ≈22 mg g−1, which is 10‐fold higher than that of their native ionic liquid. Moreover, the ionogels are easily recoverable after CO2 adsorption. The flexibility, conductivity, and CO2 capture capacity of this system can be controlled by the crosslinking ratio and ionic liquid content of the ionogels. This electrochemical device has the potential to be used in large scale plants for capturing CO2 for further electrochemical reactions.

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“…Therefore, the development of highly stable IL membranes has been a desirable goal. So far, various IL membranes, including poly-IL membranes [ 16 , 17 , 18 , 19 ], tough ion gel membranes [ 20 , 21 , 22 ], and chemically stabilized IL membranes [ 23 , 24 ] have been investigated. Among them, Vangeli et al developed chemically stabilized IL membranes by grafting silylated ILs onto the pore surface of ceramic nanofiltration membranes, and their CO 2 /CO separation performances were evaluated [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Organosilica Membrane with Ionic Liquid Properties for Separation of Toluene/H2 Mixture

et al. 2017

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In this study, we present a new concept in chemically stabilized ionic liquid membranes: an ionic liquid organosilica (ILOS) membrane, which is an organosilica membrane with ionic liquid-like properties. A silylated ionic liquid was used as a precursor for synthesis. The permselectivity, permeation mechanism, and stability of the membrane in the H2/toluene binary system were then compared with a supported ionic liquid membrane. The membrane showed a superior separation factor of toluene/H2 (>17,000) in a binary mixture system based on a solution–diffusion mechanism with improved durability over the supported ionic liquid membrane.

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Phosphonium-based poly(Ionic liquid) membranes: The effect of cation alkyl chain length on light gas separation properties and Ionic conductivity

Cited by 73 publications

References 29 publications

Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Solid‐State Poly(ionic liquid) Gels for Simultaneous CO₂ Adsorption and Electrochemical Reduction

Organosilica Membrane with Ionic Liquid Properties for Separation of Toluene/H2 Mixture

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Phosphonium-based poly(Ionic liquid) membranes: The effect of cation alkyl chain length on light gas separation properties and Ionic conductivity

Cited by 73 publications

References 29 publications

Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Poly[3-ethyl-1-vinyl-imidazolium] diethyl phosphate/Pebax® 1657 Composite Membranes and Their Gas Separation Performance

Solid‐State Poly(ionic liquid) Gels for Simultaneous CO2 Adsorption and Electrochemical Reduction

Organosilica Membrane with Ionic Liquid Properties for Separation of Toluene/H2 Mixture

Contact Info

Product

Resources

About

Solid‐State Poly(ionic liquid) Gels for Simultaneous CO₂ Adsorption and Electrochemical Reduction