Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 21, Issue 19, Pages 7224-7230Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201500007
Keywords
hydrogen; membranes; metal-organic frameworks; nanoparticles; polymers
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Funding
- National Natural Science Foundation of China [21236008, 21476206]
- Zhejiang University of Technology
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Herein we report a new ammoniation-based chemical modification strategy for synthesis of continuous and uniform metal-organic framework (MOF)/polyvinylidene fluoride (PVDF) membranes with attractive performance. Ammoniation can promote the support PVDF membrane to produce amino groups, form a nanoparticle structure, and be well cross-linked; therefore, the high-density heterogeneous nucleation sites for MOFs growth were provided and the thermal stability and chemical resistance of composite membranes can be greatly improved. The high-quality layers of representative Cu-BTC and ZIF-8 were synthesized on the chemically modified PVDF membranes. By ammoniation, ZIF-7 can even be grown under harsh synthetic conditions such as in DMF precursor solutions at 403K. The fabricated MOF/PVDF composite membranes with excellent hollow fiber structures and enhanced structural stability exhibited high H-2 permselectivities for H-2/CO2 and H-2/N-2.
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