Polybenzimidazole based polymeric ionic liquids possessing partial ionic character: Effects of anion exchange on their gas permeation properties

Rewar, Anita S.; Shaligram, Sayali V.; Kharul, Ulhas K.

doi:10.1016/j.memsci.2015.09.019

Cited by 17 publications

(13 citation statements)

References 39 publications

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“…The gas permeability measurements of films of PI‐6FDA, PI‐BPADA, [PI‐6FDA] [I], and [PI‐6FDA] [Tf 2 N] were carried out by variable‐volume method and the data are summarized in Table . The sequence of gases studied is as follows: He, H 2 , N 2 , O 2 , CH 4 , and CO 2 .…”

Section: Resultsmentioning

confidence: 99%

“…The pure gas permeability measurements on films of PI‐IEs and PI‐IMs were carried out by the variable‐volume method at pressure of 6–7 bar and at room temperature (28 °C) for He, H 2 , N 2 , O 2 , CH 4 , and CO 2 . The active area of membrane was 12.4 cm 2 .…”

Section: Methodsmentioning

confidence: 99%

“…In the recent years, polymers containing ionic groups have gained significant attention for various applications in the fields such as gas separation, lithium ion batteries, proton‐exchange membrane fuel cells (PEMFC), supercapacitors, and so forth . It has been demonstrated that polymers containing ionic groups exhibit excellent gas permeation properties and their gas permeation properties can be tuned by varying compositions of ionic groups .…”

Section: Introductionmentioning

confidence: 99%

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Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups

Shrimant

Kharul

Wadgaonkar

2018

J. Polym. Sci. Part A: Polym. Chem.

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Film‐forming polymers containing ionic groups have attracted considerable attention as emerging materials for gas separation applications. The aim of this article was to synthesize new film‐forming polyimides containing imidazolium groups (PI‐IMs) and establish their structure–performance relationship. In this context, a new aromatic diamine, namely, N1‐(4‐aminophenyl)‐N1‐(4‐(2‐phenyl‐1H‐imidazol‐1‐yl)phenyl)benzene‐1,4‐diamine (ImTPADA), was synthesized and polycondensed with three aromatic dianhydrides, namely, 4,4′‐(hexafluoroisopropylidene)diphthalic anhydride, 4,4‐(4,4‐isopropylidenediphenoxy) bis(phthalic anhydride), and 4,4′‐oxydiphthalic anhydride to form the corresponding polyimides containing pendent 2‐phenylimidazole groups (PI‐IEs). Next, PI‐IMs were prepared by N‐quaternization of pendent 2‐phenylimidazole groups present in PI‐6FDA using methyl iodide followed by anion exchange with bis(trifluoromethane)sulfonimide lithium salt (LiTf2N). PI‐IEs and PI‐IMs exhibited reasonably high molecular weights, amorphous nature, good solubility, and could be cast into self‐standing films from their DMAc solutions. Thermogravimetric analysis showed that 10% weight loss temperature of PI‐IEs and PI‐IMs were in the range 545–475 °C and 303–306 °C, respectively. Gas permeability analysis of films of PI‐IEs and PI‐IMs was investigated by variable‐volume method and it was observed that incorporation of ionic groups into PI‐6FDA resulted in increased permeability while maintaining selectivity. In particular, polymer bearing Tf2N− anion exhibited high CO2 permeability (33.3 Barr) and high selectivity for CO2/CH4 (41.1) and CO2/N2 (35.4). © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1721–1729

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups

Shrimant

Kharul

Wadgaonkar

2018

J. Polym. Sci. Part A: Polym. Chem.

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“…61 A notable effect of the anion on the CO2 gas permeability was found for the film forming PILs based on polybenzimidazoles. 62 PILs with BF4 -anion had a high CO2 permeability coefficient and CO2 permselectivity over N2 and CH4; at the same time, PILs with the bulk Tf2N -anion were preferable for sorption of noninteracting gases, such as He, H2, N2, and CH4.…”

Section: ·3 Ionic Liquids As Matrix Materialsmentioning

confidence: 99%

“…However, we can already predict their further expansion due to the development of the new gas target materials, π-conjugated silica ionogels, and Eu(III)-doped PMMA films for potential determination of CO2; 53,59,62 2,4-dinitrotoluene and 2,4,6-trinitrotoluene; 64 and biologically active organic and inorganic compounds, 107 respectively.…”

Section: Application Of the Developed Optical Sensors In Chemical Anamentioning

confidence: 99%

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

et al. 2017

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This paper reviews the primary literature reporting the use of ionic liquids (ILs) in optical sensing technologies. The optical chemical sensors that have been developed with the assistance of ILs are classified according to the type of resultant material. Key aspects of applying ILs in such sensors are revealed and discussed. They include using ILs as solvents for the synthesis of sensor matrix materials; additives in polymer matrices; matrix materials; modifiers of the surfaces; and multifunctional sensor components. The operational principles, design, texture, and analytical characteristics of the offered sensors for determining CO2, O2, metal ions, CN -, and various organic compounds are critically discussed. The key advantages and disadvantages of using ILs in optical sensing technologies are defined. Finally, the applicability of the described materials for chemical analysis is evaluated, and possibilities for their further modernization are outlined.

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Hydrogen separation using polybenzimidazole membrane with palladium nanoparticles stabilized by polyvinylpyrrolidone

Suhaimi

Leo

Ahmad

2021

Intl J of Energy Research

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An innovation in hydrogen (H 2 ) selective membrane holds the substantial key of H 2 economy. Polymers are the most practical and economical material for membrane fabrication, but their application in H 2 separation is always constrained within the selectivity-permeability "trade-off" boundary. The expensive palladium (Pd) thin films offer higher selectivity by facilitating the dissociation, diffusion and re-association of H 2 gas. This work reports on the incorporation of Pd nanoparticles into polybenzimidazole (PBI) membranes to surpass the mentioned limitations. Pd nanoparticles were synthesized and stabilized in the inversed microemulsion of polyvinylpyrrolidone (PVP) prior to blending. The X-ray diffraction and energy dispersive X-ray results proved the presence of Pd nanoparticles blended into PBI membrane with dense structure. The agglomerated and the stabilized Pd nanoparticles PBI matrix behaved very differently in H 2 adsorption at the rising temperature as shown in temperatureprogrammed reduction results. The ideal H 2 /CO 2 selectivity of PBI membrane with 1 wt% of Pd nanoparticles was improved by 49% compared to the PBI membrane at 150 C. This membrane surpassed the upper bound Robeson plot at 300 C (ideal H 2 /CO 2 selectivity of 83.57; H 2 permeability of 151.73 Barrer) and the H 2 permeation could be correlated with Van't Hoff-Arrhenius equation.

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Polybenzimidazole based polymeric ionic liquids possessing partial ionic character: Effects of anion exchange on their gas permeation properties

Cited by 17 publications

References 39 publications

Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups

Design, synthesis, and gas permeation properties of polyimides containing pendent imidazolium groups

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

Hydrogen separation using polybenzimidazole membrane with palladium nanoparticles stabilized by polyvinylpyrrolidone

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