Gas transport in bisphenol A poly(ether ether ketone ketone) membrane

Li, Xin‐Gui; Huang, Mei‐Rong; Kresse, Ingo; Springer, Jürgen

doi:10.1016/s0032-3861(01)00299-3

Cited by 7 publications

(5 citation statements)

References 41 publications

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“…Robeson plots for CO 2 /N 2 , CO 2 /CH 4 , and O 2 /N 2 separations, compared with neutral PEEK/PEKK derivatives. Note that referenced data were reported in the range of P = 2–3 atm and T = 25–35 °C, and O 2 data were not reported for most of the ionic polymers represented here. ,,,− …”

Section: Resultsmentioning

confidence: 99%

“…Postsynthetic modification of PEEK is typically performed via sulfonation (e.g., “S-PEEK”, Figure c) or nitration (e.g., “N-PEEK”, Figure d) with corresponding strong acids that yields anionic, hydrophilic, and polyelectrolyte forms of PEEK that are primarily used as H + -conducting membranes for fuel cell applications. − While “pure” PEEK is semicrystalline and thus membranes show very low gas and liquid transport rates, a handful of studies have explored the properties of modified PEEK materials as membranes for either gas or liquid separations. Experimental − and computational , studies have examined the gas transport or solvent separation behaviors through neutral, substituted, fluorinated, or sulfonated PEEK membranes.…”

Section: Introductionmentioning

confidence: 99%

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Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

O’Harra

Kammakakam

Shinde

et al. 2022

ACS Appl. Polym. Mater.

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This work presents the first example of an imidazolium ionene containing aromatic ether-ketone-ether linkages inspired by poly(ether ether ketone) (PEEK), a well-known ultrahigh-performance (UHP) engineering polymer. The requisite starting materials for this “PEEK ionene” were efficiently synthesized in good yields and then polymerized through condensation (Menshutkin reaction), followed by anion metathesis to form the final polymer product, which had a number-average molecular weight (M n) of ∼90 kDa. The properties of the PEEK-ionene were thoroughly characterized, and its potential utility was demonstrated by analyzing this material as a gas separation membrane and 3D-printing this ionic UHP polymer. Thin films of this material and composites containing “free” ionic liquids (ILs) were also tested as membranes, to evaluate the gas/permeation behaviors. While the addition of [C4mim][Tf2N] IL to the PEEK-ionene enhanced membrane performance, the ether-functionalized [PEG1mim][Tf2N] IL exhibited notably different interactions with the PEEK-ionene, resulting in diminished selectivity and irregular ordering due to partial exfoliation and dissolution of the polymer. To better understand the range of processability and morphological effects with ILs, the PEEK-ionene was extruded into fibers and was 3D-printed through fused deposition modeling (FDM) techniques, to demonstrate how the PEEK-ionene is more readily processable than conventional PEEK. Compared to neutral PEEK, the PEEK-ionene with bistriflimide (Tf2N) counterions exhibited reduced glass-transition temperature (T g) and melting point (T m) and increased permeability to gases, as well as the ability to hold ILs within their structures. This approach to the design of ionenes and PEEK-containing materials can provide great opportunities to create tailored materials for a variety of applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

O’Harra

Kammakakam

Shinde

et al. 2022

ACS Appl. Polym. Mater.

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“…(PC: D ( T = 23 °C, p = 0.1 MPa) = 8.1 × 10 –13 m 2 /s, Δ E d = 41 kJ/mol . PEEK: D ( T = 23 °C, p = 0.1 MPa) = 3.4 × 10 –13 m 2 /s, Δ E d = 17 kJ/mol). In Figure , depending on the actual temperature at c, the decrease in concentration at d–e was estimated to be 6–10% for PC and 3–7% for PEEK.…”

Section: Resultsmentioning

confidence: 99%

“…In order to estimate the loss of N 2 between the initial release of pressure and the decrease in temperature and the time of weighing, eq 3 was used, together with literature data. 33 ). In Figure 9, depending on the actual temperature at c, the decrease in concentration at d−e was estimated to be 6−10% for PC and 3−7% for PEEK.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…A nonsymmetrical mesh consisting of approximately 20 000 tetrahedral elements was used, giving acceptably low numerical errors. Inside the domain, the gas concentration c was calculated by solving eqs and with a mass diffusion coefficient depending on p and T using eqs and with coefficients either from the literature , or from the new diffusivity model. Initially, a temperature of 25 °C was used throughout the domain.…”

Section: Theory and Modelsmentioning

confidence: 99%

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Predicting Solubility and Diffusivity of Gases in Polymers under High Pressure: N₂ in Polycarbonate and Poly(ether-ether-ketone)

Nilsson

Hallstensson²,

Johansson³

et al. 2012

Ind. Eng. Chem. Res.

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The aim of this study was to develop a model that predicts the gas solubility and the sorption and desorption kinetics in polymer granulates over large temperature and pressure intervals. Besides the part predicting the solubility and diffusivity, the model involves the simultaneous solution of the diffusion equation and the heat equation in three dimensions using a finite element method (FEM). When the temperature-and pressure-dependent solubility of a specific polymer/gas combination is not known, an improved version of the non-equilibrium lattice fluid model (NELF) is used to predict the solubility. The improvement of the NELF model includes the use of Hansen's solubility parameters, and it uses pressure− volume−temperature (PVT) data from two new empirical models, which accurately estimate polymer densities over a wide range of temperatures and pressures. The new solubility model predicted the solubility−pressure data of N 2 in poly(ethyl methacrylate) and N 2 and CH 4 in polycarbonate (PC) at pressures below 4.5 MPa, without using any adjustable interaction parameters. The model was used to predict the solubility of N 2 in poly(ether-ether-ketone) (PEEK) and PC at a very high pressure (67 MPa). Experimental N 2 solubility data were obtained with a specially built reactor yielding high pressure and temperature. For PEEK, it was possible to predict the very high pressure solubility using a gas−polymer interaction parameter obtained from data taken at low pressures. In addition, a new free-volume-based diffusivity model requiring no adjustable interaction parameters was developed, and it successfully predicted the desorption kinetics of N 2 from PEEK and PC.

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Dual mode model for mixed gas permeation of CO₂, H₂, and N₂ through a dry chitosan membrane

El-Azzami¹,

Grulke²

2007

J Polym Sci B Polym Phys

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Dry chitosan is an excellent candidate for facilitated transport membranes that can be utilized in industrial applications, such as fuel cell operations and other purification processes. This article is the first to report temperature effects on transport properties of CO2, H2, and N2 in a gas mixture typical of such applications. At a feed pressure of 1.5 atm, CO2 permeabilities increased (0.381–26.1 barrers) at temperatures of 20–150 °C with decreasing CO2/N2 (19.7–4.55) and CO2/H2 (3.14–1.71) separation factors. The pressure effect on solubilities and permeabilities were fitted to the extended dual mode model and its corresponding mixed gas permeation model. The dual mode and transport parameters, the sorption heats and the activation energies of Henry's and Langmuir's regimes and their pre‐exponential parameters were determined. The Langmuir's capacity constants were utilized to estimate chitosan's glass transition temperature (CO2: 172 °C, N2: 175 °C, and H2: 171 °C). The activation energies of diffusion in the Henry's law and Langmuir regimes were dependent on the collision diameter of the gases. © 2007 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 45: 2620–2631, 2007

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Gas transport in bisphenol A poly(ether ether ketone ketone) membrane

Cited by 7 publications

References 41 publications

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Predicting Solubility and Diffusivity of Gases in Polymers under High Pressure: N₂ in Polycarbonate and Poly(ether-ether-ketone)

Dual mode model for mixed gas permeation of CO₂, H₂, and N₂ through a dry chitosan membrane

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Gas transport in bisphenol A poly(ether ether ketone ketone) membrane

Cited by 7 publications

References 41 publications

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Poly(ether ether ketone) Ionenes: Ultrahigh-Performance Polymers Meet Ionic Liquids

Predicting Solubility and Diffusivity of Gases in Polymers under High Pressure: N2 in Polycarbonate and Poly(ether-ether-ketone)

Dual mode model for mixed gas permeation of CO2, H2, and N2 through a dry chitosan membrane

Contact Info

Product

Resources

About

Predicting Solubility and Diffusivity of Gases in Polymers under High Pressure: N₂ in Polycarbonate and Poly(ether-ether-ketone)

Dual mode model for mixed gas permeation of CO₂, H₂, and N₂ through a dry chitosan membrane