Solvation Effects on the Permeation and Aging Performance of PIM-1-Based MMMs for Gas Separation

Rujing Hou, Stefan J.D. Smith, Colin D. Wood, Roger J. Mulder, Cher Hon Lau, Huanting Wang, Matthew R. Hill*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Membranes are particularly attractive for lowering the energy intensity of separations as they eliminate phase changes. While many tantalizing polymers are known, limitations in selectivity and stability slightly preclude further development. Mixed-matrix membranes may address these shortcomings. Key to their realization is the intimate mixing between the polymer and the additive to eliminate nonselective transport, improve selectivity, and resist physical aging. Polymers of intrinsic microporosity (PIMs) have inherently promising gas transport properties. Here, we show that porous additives can improve transport and resist aging in PIM-1. We develop a simple, low-cost, and scalable hyper-cross-linked polymer (poly-dichloroxylene, pDCX), which was hydroxylated to form an intimate mixture with the polar PIM-1. Solvent variation allowed control of physical aging rates and improved selectivity for smaller gases. This detailed study has allowed many interactions within mixed matrix membranes to be directly elucidated and presents a practical means to stabilize porous polymers for separation applications.

Original languageEnglish
Pages (from-to)6502-6511
Number of pages10
JournalACS Applied Materials and Interfaces
Issue number6
Early online date17 Jan 2019
Publication statusPublished - 13 Feb 2019

Keywords / Materials (for Non-textual outputs)

  • aging
  • gas separation
  • membrane casting
  • MMMs
  • nanocomposite compatibility


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