Pentiptycene-based ladder polymers with configurational free volume for enhanced gas separation performance and physical aging resistance

Corrado, Tanner J.; Huang, Zihan; Huang, Dezhao; Wamble, Noah; Luo, Tengfei; Guo, Ruilan

doi:10.1073/pnas.2022204118

Title: Pentiptycene-based ladder polymers with configurational free volume for enhanced gas separation performance and physical aging resistance

Journal Article · 06 September 2021 · Proceedings of the National Academy of Sciences of the United States of America

DOI: https://doi.org/10.1073/pnas.2022204118 · OSTI ID:1819223

^[1]; Huang, Zihan ^[1];

^[2]; Wamble, Noah ^[1];

^[2];

^[1]

Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, IN 46556,
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46556

Significance Gas separation membranes are an emerging energy-efficient alternative toward conventional, energy-intensive separation technologies such as cryogenic distillation. Ladder polymers with intrinsic microporosity show exceptional promise toward redefining state-of-the-art gas separation membranes due to their high permeability (throughput) and selectivity (separation efficiency). However, they are typically inhibited by major reductions in permeability over time due to collapsing membrane free volume (open space between polymer chains), forfeiting their greatest asset. This work explores a route toward enhanced aging resistance and overall separation performance by incorporating pentiptycene (an H-shaped scaffold containing five fused arene rings) into ladder-like polymers to incorporate natural, more permanent “micropores” that aren’t susceptible to densification of polymer chains that occurs over time in traditional microporous polymers.

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Research Organization:: Univ. of Notre Dame, IN (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division

Grant/Contract Number:: SC0019024

OSTI ID:: 1819223

Journal Information:: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 37 Vol. 118; ISSN 0027-8424

Publisher:: Proceedings of the National Academy of SciencesCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Science & Technology - Other Topics
gas separation
iptycenes configurational free volume
ladder polymers
membranes
physical aging

Title: Pentiptycene-based ladder polymers with configurational free volume for enhanced gas separation performance and physical aging resistance

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