Metal–Organic Framework/PVDF Composite Membranes with High H2 Permselectivity Synthesized by Ammoniation |
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| Authors: | Dr Wanbin Li Prof?Dr Qin Meng Dr Congyang Zhang Prof?Dr Guoliang Zhang |
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| Institution: | 1. Institute of Oceanic and, Environmental Chemical Engineering, College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014 (P.R. China);2. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027 (P.R. China) |
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| Abstract: | 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 403 K. The fabricated MOF/PVDF composite membranes with excellent hollow fiber structures and enhanced structural stability exhibited high H2 permselectivities for H2/CO2 and H2/N2. |
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| Keywords: | hydrogen membranes metal– organic frameworks nanoparticles polymers |
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