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Hydrocarbon ladder polymers with ultrahigh permselectivity for membrane gas separations

Journal Article · · Science
 [1];  [2];  [1];  [1];  [3];  [3];  [2];  [1]
  1. Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
  2. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  3. Advanced Membranes and Porous Materials Center, Chemical Engineering Program, Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia.

Membranes have the potential to substantially reduce energy consumption of industrial chemical separations, but their implementation has been limited owing to a performance upper bound—the trade-off between permeability and selectivity. Although recent developments of highly permeable polymer membranes have advanced the upper bounds for various gas pairs, these polymers typically exhibit limited selectivity. We report a class of hydrocarbon ladder polymers that can achieve both high selectivity and high permeability in membrane separations for many industrially relevant gas mixtures. Additionally, their corresponding films exhibit desirable mechanical and thermal properties. Tuning of the ladder polymer backbone configuration was found to have a profound effect on separation performance and aging behavior.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
DOE Contract Number:
SC0019087
OSTI ID:
1980737
Journal Information:
Science, Vol. 375, Issue 6587; ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English

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