Journal
ADVANCED SCIENCE
Volume 9, Issue 7, Pages -Publisher
WILEY
DOI: 10.1002/advs.202104643
Keywords
aerogels; COF-membranes; covalent organic frameworks; gas mixtures separation; porous materials
Categories
Funding
- Spanish MINECO [PID2019-106268GBC31, PID2019-106268GB-C32, PCI2018-093081, RTI2018-095622-BI00]
- Catalan AGAUR [2017 SGR 238]
- CERCA Program/Generalitat de Catalunya
- Severo Ochoa program from the Spanish MINECO [SEV-2017-0706]
- National Research Foundation Singapore [NRF2018-NRF-ANR007]
- Ministry of Education - Singapore [MOE2018-T2-2-148, MOE2019-T2-1-093]
- Maria de Maeztu Programme for Units of Excellence in RD [CEX2018-000805M]
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A simple compression method is reported to prepare large-scale, free-standing, homogeneous and porous imine-based COF membranes, which exhibit excellent mechanical and separation performances.
Demand continues for processing methods to shape covalent organic frameworks (COFs) into macroscopic objects that are needed for their practical applications. Herein, a simple compression method to prepare large-scale, free-standing homogeneous and porous imine-based COF-membranes with dimensions in the centimeter range and excellent mechanical properties is reported. This method entails the compression of imine-based COF-aerogels, which undergo a morphological change from an elastic to plastic material. The COF-membranes fabricated upon compression show good performances for the separation of gas mixtures of industrial interest, N-2/CO2 and CH4/CO2. It is believed that the new procedure paves the way to a broader range of COF-membranes.
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