Ending Aging in Super Glassy Polymer Membranes

Aging in super glassy polymers such as poly(trimethylsilylpropyne) (PTMSP), poly(4‐methyl‐2‐pentyne) (PMP), and polymers with intrinsic microporosity (PIM‐1) reduces gas permeabilities and limits their application as gas‐separation membranes. While super glassy polymers are initially very porous, an...

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Bibliographic Details
Published in:Angewandte Chemie 2014-05, Vol.126 (21), p.5426-5430
Main Authors: Lau, Cher Hon, Nguyen, Phuc Tien, Hill, Matthew R., Thornton, Aaron W., Konstas, Kristina, Doherty, Cara M., Mulder, Roger J., Bourgeois, Laure, Liu, Amelia C. Y., Sprouster, David J., Sullivan, James P., Bastow, Timothy J., Hill, Anita J., Gin, Douglas L., Noble, Richard D.
Format: Article
Language:eng ; ger
Subjects:
Absorption
Aging
Alterung
Carbon dioxide
Chains (polymeric)
Chemistry
Density
Gastrennung
Glassy
Membranen
Membranes
Microporosity
Permeability
Polymere
Polymers
Porosity
Poröse Materialien
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Summary:Aging in super glassy polymers such as poly(trimethylsilylpropyne) (PTMSP), poly(4‐methyl‐2‐pentyne) (PMP), and polymers with intrinsic microporosity (PIM‐1) reduces gas permeabilities and limits their application as gas‐separation membranes. While super glassy polymers are initially very porous, and ultra‐permeable, they quickly pack into a denser phase becoming less porous and permeable. This age‐old problem has been solved by adding an ultraporous additive that maintains the low density, porous, initial stage of super glassy polymers through absorbing a portion of the polymer chains within its pores thereby holding the chains in their open position. This result is the first time that aging in super glassy polymers is inhibited whilst maintaining enhanced CO2 permeability for one year and improving CO2/N2 selectivity. This approach could allow super glassy polymers to be revisited for commercial application in gas separations. Wie eine Perlenkette sind Polymerketten einer permeablen Membran innerhalb der Poren von PAF‐1‐Partikeln (PAF=poröses aromatisches Gerüst) interkaliert, was die Entspannung der Polymerkette hemmt und die Alterung stoppt. Der Einbau in PAF‐1 verbessert auch drastisch die Gaspermeabilität (siehe Diagramm).
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201402234