The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane

Kusuma, Victor A.; Chen, Christina; Baker, James S.; Macala, Megan K.; Hopkinson, David

doi:10.1016/j.polymer.2019.121666

Cited by 22 publications

(7 citation statements)

References 24 publications

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“…Kusuma et al explored their potential for CO 2 separations and showed that many properties vary with IL identity and cross-linking density. 12,13 Supported ionic liquid membranes (SILMs) are porous polymer films that are filled with ionic liquid, which is held primarily by capillary forces. 18−20 This film construction limits carbon capture utility because large transmembrane pressures can evacuate the membrane.…”

Section: Introductionmentioning

confidence: 99%

“…IL–polymer composites are diverse and include ion gels, − supported ionic liquid membranes (SILMs), , and polyionic liquids (PILs). , These composite materials differ in the method of trapping the IL.…”

Section: Introductionmentioning

confidence: 99%

“…Benefits of ion gels include the potential for both physical and chemical interactions between the polymer and the ionic liquid, along with the commercial availability of the components. Kusuma et al explored their potential for CO 2 separations and showed that many properties vary with IL identity and cross-linking density. , …”

Section: Introductionmentioning

confidence: 99%

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Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

Kelsheimer

Garrett-Roe

2020

J. Phys. Chem. B

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Ultrafast two-dimensional infrared spectroscopy (2D-IR) and Fourier transform infrared spectroscopy (FTIR) were used to measure carbon dioxide (CO2) in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]), cross-linked low-molecular-weight poly(ethylene glycol) diacrylate (PEGDA), and an ion gel composed of a 50 vol % blend of the two. The center frequency of the antisymmetric stretch, ν3, of CO2 shifts monotonically to lower wavenumbers with increasing polymer content, with the largest line width in the ion gel (6 cm–1). Increasing polymer content slows both spectral diffusion and vibrational energy relaxation (VER) rates. An unexpected excited-state absorbance peak appears in the 2D-IR of cross-linked PEGDA due to VER from the antisymmetric stretch into the bending mode, ν2. Thirty-two response functions are necessary to describe the observed features in the 2D-IR spectra. Nonlinear least-squares fitting extracts both spectral diffusion and VER rates. In the ion gel, CO2 exhibits spectral diffusion dynamics that lie between that of the pure compounds. The kinetics of VER reflect both fast excitation and de-excitation of the bending mode, similar to the ionic liquid (IL), and slow overall vibrational population relaxation, similar to the cross-linked polymer. The IL-like and polymer-like dynamics suggest that the CO2 resides at the interface of the two components in the ion gel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

Kelsheimer

Garrett-Roe

2020

J. Phys. Chem. B

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“…On the other hand, when varying the polymer network structure, a lower cross-link density tends to yield a higher permeability because it allows the incorporation of more [EMIM][Tf 2 N]. A lower cross-link density also improves the tensile properties [ 298 ]. For successful membrane preparation, the compatibility of the IL is of particular interest, and in a series of cross-linked PEO ion gels, 1,3-substituted imidazolium-based ILs with an aromatic cation and acidic proton and with a low basicity anion (such as [Tf 2 N]) show good miscibility and high thermal stability.…”

Section: Polymer/il Blends; Ion Gelsmentioning

confidence: 99%

“…proves the tensile properties [298]. For successful membrane preparation, the compatibility of the IL is of particular interest, and in a series of cross-linked PEO ion gels, 1,3-substituted imidazolium-based ILs with an aromatic cation and acidic proton and with a low basicity anion (such as [Tf2N]) show good miscibility and high thermal stability.…”

Section: Epoxy-based Networkmentioning

confidence: 99%

A Review on Ionic Liquid Gas Separation Membranes

et al. 2021

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Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane materials and membranes for gas and vapor separation, ionic liquids have been investigated extensively in the last decade and a half. This review gives a complete overview of the main developments in the field of ionic liquid membranes since their first introduction. It covers all different materials, membrane types, their preparation, pure and mixed gas transport properties, and examples of potential gas separation applications. Special systems will also be discussed, including facilitated transport membranes and mixed matrix membranes. The main strengths and weaknesses of the different membrane types will be discussed, subdividing them into supported ionic liquid membranes (SILMs), poly(ionic liquids) or polymerized ionic liquids (PILs), polymer/ionic liquid blends (physically or chemically cross-linked ‘ion-gels’), and PIL/IL blends. Since membrane processes are advancing as an energy-efficient alternative to traditional separation processes, having shown promising results for complex new separation challenges like carbon capture as well, they may be the key to developing a more sustainable future society. In this light, this review presents the state-of-the-art of ionic liquid membranes, to analyze their potential in the gas separation processes of the future.

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Polyetheretherketone blends with excellent properties achieved via crosslinkable polyetherimide at high temperatures

Bai

Niu

Wang

et al. 2023

J of Applied Polymer Sci

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With the development of science and technology, polymer materials that work at high temperatures are widely needed. However, currently available polymers are limited to relatively low operating temperatures, with various properties rapidly degrading at high temperatures. Here, with crosslinked polyetherimide (c-PEI), polyetheretherketone (PEEK) is modified by mechanical blending and extrusion granulation to prepare c-PEI/PEEK polymer blends. Compared with the commercial polyetherimide (s-PEI) without crosslinking groups, the construction of its crosslinking network in c-PEI further restricts the movement of molecular segments and more significantly improves the thermodynamic properties of PEEK at high temperature. This work systematically investigates the effect of the crosslinking degree of polymer blends on performance and balances processability and other properties by controlling the crosslinking degree. Furthermore, this work demonstrates a feasible strategy to fabricate highperformance polymer materials with high temperature resistance.

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The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane

Cited by 22 publications

References 24 publications

Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

A Review on Ionic Liquid Gas Separation Membranes

Polyetheretherketone blends with excellent properties achieved via crosslinkable polyetherimide at high temperatures

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The effect of Poly(Ethylene oxide) cross-linking structure on the mechanical properties and CO2 separation performance of an ion gel membrane

Cited by 22 publications

References 24 publications

Intramolecular Vibrational Energy Relaxation of CO2 in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

Intramolecular Vibrational Energy Relaxation of CO2 in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

A Review on Ionic Liquid Gas Separation Membranes

Polyetheretherketone blends with excellent properties achieved via crosslinkable polyetherimide at high temperatures

Contact Info

Product

Resources

About

Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels

Intramolecular Vibrational Energy Relaxation of CO₂ in Cross-Linked Poly(ethylene glycol) Diacrylate-Based Ion Gels