Highly permeable Thermally Rearranged Mixed Matrix Membranes (TR-MMM)

Stefan J.D. Smith*, Rujing Hou, Cher Hon Lau, Kristina Konstas, Melanie Kitchin, Guangxi Dong, Jongmyeong Lee, Won Hee Lee, Jong Geun Seong, Young Moo Lee, Matthew R. Hill

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Thermally Rearranged (TR) polymers and Mixed Matrix Membranes (MMMs) are two effective approaches used to advance the performance of gas separation membranes. Conversion of thermally activated groups in TR membranes result in hourglass-shaped cavities and unusually high permselectivity, whereas the inclusion of nanoparticles with engineered pore volume, window size and/or surface chemistry in MMMs can add fast and selective pathways for gas transport. In this study, we explored the effects of combining these two approaches by adding ultra-porous and highly thermostable PAF-1 nanoparticles into the TR-able polymer, 6FDA-HAB5DAM5 (DAM). Gas separation performances of TR-MMMs were evaluated by comparison with the pure polymer and another TR-MMM bearing an already thermally-treated PAF-1 additive (cPAF). While both additives enhanced gas transport, only PAF-1 stabilized the TR conversion reaction and improved the TR-MMM's material properties. Minor variations in cPAF surface changed the TR-MMM interfacial interactions as well as other properties crucial to the application of advanced membrane materials, namely aging, plasticization, and mechanical stability. By combining thermal rearrangement process with PAF-1, TR-MMM demonstrated a 55-fold increase in CO2 gas permeability (37-fold for H2) at similar gas selectivities, but without the handling issues observed for the pure TR polymer membrane.

Original languageEnglish
Pages (from-to)260-270
Number of pages11
JournalJournal of Membrane Science
Early online date20 May 2019
Publication statusPublished - 1 Sept 2019

Keywords / Materials (for Non-textual outputs)

  • Gas separation
  • Interfacial interaction
  • Mixed-matrix membranes
  • Porous materials
  • Thermal rearrangement


Dive into the research topics of 'Highly permeable Thermally Rearranged Mixed Matrix Membranes (TR-MMM)'. Together they form a unique fingerprint.

Cite this