ABA-triblock copolymer ion gels for CO2 separation applications

Gu, Yuanyan; Cussler, E. L.; Lodge, Timothy P.

doi:10.1016/j.memsci.2012.07.011

Cited by 80 publications

(73 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PILs are unique compared to common neutral polymers as they exhibit properties such as high ion conductivity, chemical and thermal stability, and tunable solubility . The unique properties of PILs are exploited in a variety of applications such as CO 2 separation membranes, organic field‐effect transistors and solid state electrolytes in electrochemical capacitors …”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7] PILs are unique compared to common neutral polymers as they exhibit properties such as high ion conductivity, chemical and thermal stability, and tunable solubility. [8] The unique properties of PILs are exploited in a variety of applications such as CO 2 separation membranes, [6,9,10] organic field-effect transistors [11,12] and solid state electrolytes in electrochemical capacitors. [13] The majority of the PILs that have been reported are prepared by conventional free radical polymerization, which results in large polymer dispersity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nitroxide Mediated Polymerization of 1‐(4‐vinylbenzyl)‐3‐butylimidazolium Ionic Liquid Containing Homopolymers and Methyl Methacrylate Copolymers

2018

View full text Add to dashboard Cite

The synthesis of well‐defined imidazolium‐based poly(ionic liquid)s (PILs) copolymers by nitroxide mediated polymerization (NMP) is reported. The viability of three different synthetic pathways to achieve poly[1‐(4‐vinylbenzyl)‐3‐butylimidazolium bis(trifluoromethylsulphonyl)‐imide‐co‐methyl methacrylate] (poly(VBBI+TFSI‐‐co‐MMA)) was explored including direct polymerization of the ionic liquid monomer (VBBI+TFSI‐) and post functionalization of precursor polymer poly(4‐vinylbenzyl imidazole‐co‐methyl methacrylate). PILs with well‐controlled molecular weight and low dispersity (trueMw¯/trueMn¯ < 1.3) were obtained via all routes. A full synthetic, kinetic, and compositional comparison between methods is reported. These results illustrate an effective route for the synthesis of well‐defined, pseudo‐living functional PIL‐methacryalte copolymers with tunable properties through potential methacrylate monomer substitution.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitroxide Mediated Polymerization of 1‐(4‐vinylbenzyl)‐3‐butylimidazolium Ionic Liquid Containing Homopolymers and Methyl Methacrylate Copolymers

2018

View full text Add to dashboard Cite

show abstract

“…4 Various methods of making ion gels have been reported, including in situ thermal-or UVinitiated radical polymerization, 5 direct cross-end-coupling of two macromonomers, 6 and physical cross-linking methods, 7,8 Among these methods, self-assembly of ABA triblock copolymers 9−11 proves to be simple, universal, and efficient.…”

Section: ■ Introductionmentioning

confidence: 99%

Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid

et al. 2015

View full text Add to dashboard Cite

Ion gels with tunable storage moduli are prepared through the self-assembly of an ABA triblock copolymer AOA-12 comprised of a thermotropic liquid crystalline (LC) polymer as the end-block A and poly(ethylene oxide) (PEO) as the mid-block B in a room-temperature ionic liquid (IL), 1-ethyl-3-methylimidazolium bis(trifluoromethylsufonyl)imide ([EMIM][TFSI]). The PEO mid-block is well-solvated by this ionic liquid, whereas the LC polymer end-blocks aggregate and serve as the physical crosslinkers. For comparison, a triblock copolymer AOA-0 containing a non-LC side-chain polymer with the same mesogen is also synthesized, and its corresponding ion gel is prepared. The ion gels with relatively high concentrations of the LC triblock copolymer have hierarchical structures with different microphase-separated nanostructures and the LC arrangement of the LC blocks. By incorporating the azobenzene mesogen in the side chains, transparent AOA-n/[EMIM][TFSI] (where n is the number of carbon atoms in the spacer between the azobenzene mesogen and the polymethacrylate backbone, and n = 0, 12), ion gels are obtained with concentrations of the polymer as low as around 2 wt %. The ion gel obtained has a storage modulus as high as ∼10 kPa, while its conductivity is close to that of the pure IL mainly because of the high IL concentration of the ion gel. Furthermore, the storage modulus of the AOA-12/IL ion gel can be tuned by temperature because of the thermotropic phase behavior of the LC block. These ion gels are potentially useful as high-temperature ionic membranes or thermal-responsive soft actuators. ■ INTRODUCTIONRecently ion gels which are made from polymeric networks swollen with ionic liquids (ILs) have attracted a great deal of attention because of their diverse applications in electronics, 1,2 actuators, 3 and gas separation. 4 Various methods of making ion gels have been reported, including in situ thermal-or UVinitiated radical polymerization, 5 direct cross-end-coupling of two macromonomers, 6 and physical cross-linking methods, 7,8 Among these methods, self-assembly of ABA triblock copolymers 9−11 proves to be simple, universal, and efficient.Lodge and co-workers reported an ion gel comprised of polystyrene-b-poly(ethylene oxide)-b-polystyrene (PS-b-PEOb-PS, SOS, as low as 5 wt %) and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]). 9 The storage modulus of the ion gel was around 1 kPa, while the conductivity of ion gel was close to that of the pure ionic liquid because of the relatively low concentration of SOS in the ion gel. By incorporating poly(N-isopropylacrylamide) (PNIPAm), which exhibits the upper critical solution temperature (UCST) phase behavior in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([EMIM][TFSI]), into the triblock copolymer as the end-blocks, thermoreversible ion gels were obtained. 12 Furthermore, thermoreversible ion gels with tunable gel−sol transition temperatures were achieved by introducing a second IL-phobic block, PS, into the PNIPAm-b-PEO-b-PNIPAm triblo...

show abstract

“…poly(styrene), poly(acrylate), etc.) [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28]. Bara and co-workers demonstrated that many unique IL monomers could be synthesized and that poly(IL)-IL composites could be formed by incorporating a nonpolymerizable IL within the poly(IL) structure [29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Effect of branched and cycloalkyl functionalities on CO2 separation performance of poly(IL) membranes

Horne

Andrews

Shannon

et al. 2015

Separation and Purification Technology

View full text Add to dashboard Cite

ABA-triblock copolymer ion gels for CO2 separation applications

Cited by 80 publications

References 77 publications

Nitroxide Mediated Polymerization of 1‐(4‐vinylbenzyl)‐3‐butylimidazolium Ionic Liquid Containing Homopolymers and Methyl Methacrylate Copolymers

Nitroxide Mediated Polymerization of 1‐(4‐vinylbenzyl)‐3‐butylimidazolium Ionic Liquid Containing Homopolymers and Methyl Methacrylate Copolymers

Thermoreversible Ion Gel with Tunable Modulus Self-Assembled by a Liquid Crystalline Triblock Copolymer in Ionic Liquid

Effect of branched and cycloalkyl functionalities on CO2 separation performance of poly(IL) membranes

Contact Info

Product

Resources

About