The Magic of Spiro‐Epoxy Moiety: An Easy Way to Improve CO 2 ‐Separation Performance of Polymer Membrane

Abstract The development of polymers with high separation characteristics for the efficient removal of carbon dioxide from bio‐/natural gases is the key to reducing the environmental impact of CO 2 . In this work, preparation and gas‐separation properties of novel vinyl‐addition polynorbornenes cont...

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Bibliographic Details
Published in:Advanced functional materials 2024-08, Vol.34 (32)
Main Authors: Wozniak, Alyona I., Bermesheva, Evgeniya V., Petukhov, Dmitrii I., Lunin, Artyom O., Borisov, Ilya L., Shantarovich, Victor P., Bekeshev, Valentin G., Alentiev, Dmitry A., Bermeshev, Maxim V.
Format: Article
Language:English
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Summary:Abstract The development of polymers with high separation characteristics for the efficient removal of carbon dioxide from bio‐/natural gases is the key to reducing the environmental impact of CO 2 . In this work, preparation and gas‐separation properties of novel vinyl‐addition polynorbornenes containing oxirane‐moieties at spiro centers, which combine high CO 2 ‐permeability with remarkable selectivities for separation of CO 2 from its mixtures with nitrogen and methane are published. Gas permeability data of the epoxidized polymer based on 5‐ethylidene‐2‐norbornene exceed the Robeson upper bound of 2019 for the CO 2 /N 2 system (CO 2 permeability is 1000 Barrer, α(CO 2 /N 2 ) = 67)). Separation experiments with mixtures of gases confirm the high separation performance of this polymer. In particular, the data for CO 2 /CH 4 separation are above or close to the upper bound of 2018 for mixed gases. A similar effect of introducing oxirane moieties into spiro centers is also shown for another vinyl‐addition polymer derived from 5‐isopropylidene‐2‐norbornene and is not observed for a related polymer bearing oxirane moieties at the ends of side chains. A simple synthesis of the epoxidized polymer from available 5‐ethylidene‐2‐norbornene, combined with high CO 2 ‐permeability and selectivities, may open a window for industrial applications of this polymer in important membrane processes, in particular, for natural/biogas upgrading.
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202405461