Jump to main content
Jump to site search

Issue 33, 2020
Previous Article Next Article

Tailoring molecular interactions between microporous polymers in high performance mixed matrix membranes for gas separations

Author affiliations

Abstract

Membranes are crucial to lowering the huge energy costs of chemical separations. Whilst some promising polymers demonstrate excellent transport properties, problems of plasticisation and physical aging due to mobile polymer chains, amongst others, prevent their exploitation in membranes for industrial separations. Here we reveal that molecular interactions between a polymer of intrinsic microporosity (PIM) matrix and a porous aromatic framework additive (PAF-1) can simultaneously address plasticisation and physical aging whilst also increasing gas transport selectivity. Extensive spectroscopic characterisation and control experiments involving two near-identical PIMs, one with methyl groups (PIM-EA(Me2)-TB) and one without (PIM-EA(H2)-TB), directly confirm the key molecular interaction as the adsoprtion of methyl groups from the PIM matrix into the nanopores of the PAF. This interaction reduced physical aging by 50%, suppressed polymer chain mobilities at high pressure and increased H2 selectivity over larger gases such as CH4 and N2.

Graphical abstract: Tailoring molecular interactions between microporous polymers in high performance mixed matrix membranes for gas separations

Back to tab navigation

Supplementary files

Article information


Submitted
25 Jun 2020
Accepted
06 Aug 2020
First published
07 Aug 2020

This article is Open Access

Nanoscale, 2020,12, 17405-17410
Article type
Paper

Tailoring molecular interactions between microporous polymers in high performance mixed matrix membranes for gas separations

C. H. Lau, K. Konstas, C. M. Doherty, S. J. D. Smith, R. Hou, H. Wang, M. Carta, H. Yoon, J. Park, B. D. Freeman, R. Malpass-Evans, E. Lasseuguette, M. Ferrari, N. B. McKeown and M. R. Hill, Nanoscale, 2020, 12, 17405 DOI: 10.1039/D0NR04801A

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.

To request permission to reproduce material from this article in a commercial publication, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party commercial publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.


Social activity

Search articles by author

Spotlight

Advertisements