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Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation

Institute on Membrane Technology, ITM-CNR, Via P. Bucci 17/C, 87036 Rende (CS), Italy
Department of Chemistry, Durham University, Stockton Road, Durham DH1 3LE, UK
Department of Chemistry, College of Science, Swansea University, Grove Building, Singleton Park, Swansea SA2 8PP, UK
EastChem, School of Chemistry, University of Edinburgh, David Brewster Road, Edinburgh EH9 3FJ, UK
Authors to whom correspondence should be addressed.
Polymers 2019, 11(1), 46;
Received: 7 December 2018 / Revised: 21 December 2018 / Accepted: 25 December 2018 / Published: 30 December 2018
The effect on the gas transport properties of Matrimid®5218 of blending with the polymer of intrinsic microporosity PIM-EA(H2)-TB was studied by pure and mixed gas permeation measurements. Membranes of the two neat polymers and their 50/50 wt % blend were prepared by solution casting from a dilute solution in dichloromethane. The pure gas permeability and diffusion coefficients of H2, He, O2, N2, CO2 and CH4 were determined by the time lag method in a traditional fixed volume gas permeation setup. Mixed gas permeability measurements with a 35/65 vol % CO2/CH4 mixture and a 15/85 vol % CO2/N2 mixture were performed on a novel variable volume setup with on-line mass spectrometric analysis of the permeate composition, with the unique feature that it is also able to determine the mixed gas diffusion coefficients. It was found that the permeability of Matrimid increased approximately 20-fold with the addition of 50 wt % PIM-EA(H2)-TB. Mixed gas permeation measurements showed a slightly stronger pressure dependence for selectivity of separation of the CO2/CH4 mixture as compared to the CO2/N2 mixture, particularly for both the blended membrane and the pure PIM. The mixed gas selectivity was slightly higher than for pure gases, and although N2 and CH4 diffusion coefficients strongly increase in the presence of CO2, their solubility is dramatically reduced as a result of competitive sorption. A full analysis is provided of the difference between the pure and mixed gas transport parameters of PIM-EA(H2)-TB, Matrimid®5218 and their 50:50 wt % blend, including unique mixed gas diffusion coefficients. View Full-Text
Keywords: polymer blend; polymer of intrinsic microporosity; PIM-EA(H2)-TB; Tröger’s base polymer; Matrimid; gas separation; mixed gas diffusion polymer blend; polymer of intrinsic microporosity; PIM-EA(H2)-TB; Tröger’s base polymer; Matrimid; gas separation; mixed gas diffusion
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MDPI and ACS Style

Esposito, E.; Mazzei, I.; Monteleone, M.; Fuoco, A.; Carta, M.; McKeown, N.B.; Malpass-Evans, R.; Jansen, J.C. Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation. Polymers 2019, 11, 46.

AMA Style

Esposito E, Mazzei I, Monteleone M, Fuoco A, Carta M, McKeown NB, Malpass-Evans R, Jansen JC. Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation. Polymers. 2019; 11(1):46.

Chicago/Turabian Style

Esposito, Elisa, Irene Mazzei, Marcello Monteleone, Alessio Fuoco, Mariolino Carta, Neil B. McKeown, Richard Malpass-Evans, and Johannes C. Jansen. 2019. "Highly Permeable Matrimid®/PIM-EA(H2)-TB Blend Membrane for Gas Separation" Polymers 11, no. 1: 46.

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