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An efficient polymer molecular sieve for membrane gas separations

Carta, Mariolino ORCID:, Malpass-Evans, Richard, Croad, Matthew, Rogan, Yulia, Jansen, Johannes C., Bernardo, Paola, Bazzarelli, Fabio and McKeown, Neil B. 2013. An efficient polymer molecular sieve for membrane gas separations. Science 339 (6117) , pp. 303-307. 10.1126/science.1228032

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Microporous polymers of extreme rigidity are required for gas-separation membranes that combine high permeability with selectivity. We report a shape-persistent ladder polymer consisting of benzene rings fused together by inflexible bridged bicyclic units. The polymer’s contorted shape ensures both microporosity—with an internal surface area greater than 1000 square meters per gram—and solubility so that it is readily cast from solution into robust films. These films demonstrate exceptional performance as molecular sieves with high gas permeabilities and good selectivities for smaller gas molecules, such as hydrogen and oxygen, over larger molecules, such as nitrogen and methane. Hence, this polymer has excellent potential for making membranes suitable for large-scale gas separations of commercial and environmental relevance.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Publisher: American Association for the Advancement of Science
ISSN: 0036-8075
Funders: EU, EPSRC
Last Modified: 24 Oct 2022 09:59

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