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Title: Thermally Rearranged Polymer Membranes Containing Tröger's Base Units Have Exceptional Performance for Air Separations

Abstract

The influence of segmental chain motion on the gas separation performance of thermally rearranged (TR) polymer membranes is established for TR polybenzoxazoles featuring Tröger's base (TB) monomer subunits as exceptionally rigid sites of contortion along the polymer backbone. These polymers are accessed from solution-processable ortho-acetate functionalized polyimides, which are readily synthesized as high-molecular-weight polymers for membrane casting. We discover that thermal rearrangement leads to a small increase in d-spacing between polymer chains and a dramatic pore-network reconfiguration that increases both membrane permeability and O 2/N 2 selectivity, enabling its performance above the 2015 upper bound.

Authors:
 [1];  [2];  [3];  [3];  [1]; ORCiD logo [3]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States). Energy Frontier Research Center (EFRC) Center for Gas Separations Relevant to Clean Energy Technologies (CGS)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1470335
Alternate Identifier(s):
OSTI ID: 1423719
Grant/Contract Number:  
SC0001015; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 57; Journal Issue: 18; Related Information: CGS partners with University of California, Berkeley; University of California, Davis; Lawrence Berkeley National Laboratory; University of Minnesota; National Energy Technology Laboratory; Texas A&M University; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
gas separations; membranes; polymers; selective transport; Tröger's base

Citation Formats

Meckler, Stephen M., Bachman, Jonathan E., Robertson, Benjamin P., Zhu, Chenhui, Long, Jeffrey R., and Helms, Brett A. Thermally Rearranged Polymer Membranes Containing Tröger's Base Units Have Exceptional Performance for Air Separations. United States: N. p., 2018. Web. doi:10.1002/anie.201800556.
Meckler, Stephen M., Bachman, Jonathan E., Robertson, Benjamin P., Zhu, Chenhui, Long, Jeffrey R., & Helms, Brett A. Thermally Rearranged Polymer Membranes Containing Tröger's Base Units Have Exceptional Performance for Air Separations. United States. doi:10.1002/anie.201800556.
Meckler, Stephen M., Bachman, Jonathan E., Robertson, Benjamin P., Zhu, Chenhui, Long, Jeffrey R., and Helms, Brett A. Mon . "Thermally Rearranged Polymer Membranes Containing Tröger's Base Units Have Exceptional Performance for Air Separations". United States. doi:10.1002/anie.201800556. https://www.osti.gov/servlets/purl/1470335.
@article{osti_1470335,
title = {Thermally Rearranged Polymer Membranes Containing Tröger's Base Units Have Exceptional Performance for Air Separations},
author = {Meckler, Stephen M. and Bachman, Jonathan E. and Robertson, Benjamin P. and Zhu, Chenhui and Long, Jeffrey R. and Helms, Brett A.},
abstractNote = {The influence of segmental chain motion on the gas separation performance of thermally rearranged (TR) polymer membranes is established for TR polybenzoxazoles featuring Tröger's base (TB) monomer subunits as exceptionally rigid sites of contortion along the polymer backbone. These polymers are accessed from solution-processable ortho-acetate functionalized polyimides, which are readily synthesized as high-molecular-weight polymers for membrane casting. We discover that thermal rearrangement leads to a small increase in d-spacing between polymer chains and a dramatic pore-network reconfiguration that increases both membrane permeability and O2/N2 selectivity, enabling its performance above the 2015 upper bound.},
doi = {10.1002/anie.201800556},
journal = {Angewandte Chemie (International Edition)},
number = 18,
volume = 57,
place = {United States},
year = {2018},
month = {2}
}

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Cited by: 5 works
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