Journal
SCIENCE
Volume 376, Issue 6588, Pages 90-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.abj9351
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Funding
- Research Council of Norway through the POLYMEM project in the CLIMIT program [254791]
- UEFSCDI Romania through the CO2Hybrid project [13/2020]
- National Science Foundation through the North Carolina Research Triangle Nanotechnology Network, National Nanotechnology Coordinated Infrastructure [ECCS2025064]
- Kraton Corporation
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This study introduces a hybrid-integrated membrane strategy that combines improved permeability and selectivity for carbon dioxide separation. The membrane is chemically functionalized to enhance CO2 transport, and the method of fabrication is cost-effective and scalable. This research has great potential for practical applications in mitigating global climate change.
Advances in membrane technologies that combine greatly improved carbon dioxide (CO2) separation efficacy with low costs, facile fabrication, feasible upscaling, and mechanical robustness are needed to help mitigate global climate change. We introduce a hybrid-integrated membrane strategy wherein a high-permeability thin film is chemically functionalized with a patchy CO2-philic grafted chain surface layer. A high-solubility mechanism enriches the concentration of CO2 in the surface layer hydrated by water vapor naturally present in target gas streams, followed by fast CO2 transport through a highly permeable (but low-selectivity) polymer substrate. Analytical methods confirm the existence of an amine surface layer. Integrated multilayer membranes prepared in this way are not diffusion limited and retain much of their high CO2 permeability, and their CO2 selectivity is concurrently increased in some cases by more than similar to 150-fold.
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