Journal
POLYMERS FOR ADVANCED TECHNOLOGIES
Volume 30, Issue 2, Pages 417-424Publisher
WILEY
DOI: 10.1002/pat.4479
Keywords
covalent organic framework; gas separation; mixed matrix membrane; nitrogen; polyimide
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Funding
- National Natural Science Foundation of China [21576215, 51602217]
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An imide-linked covalent organic framework (COF) was successfully synthesized by directly heating a mixture of melamine and biphenyltetracarboxylic dianhydride (BPDA) in a tubular oven at 335 degrees C. The crystalline and nanostructure of this COF was characterized by X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET). A mixed matrix membrane (MMM) was prepared by blending the COF into the commercial P84 polyimide in solution. It is found that the COF particles not only act as gas channels for N-2 and O-2 permeation but also provided an inverse permselective property with higher permeability of N-2. The effect of COF nanostructure and its loading amount on N-2 and O-2 permeability and selectivity has been investigated.
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