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      Metal-Organic Framework/PVDF Composite Membranes with High H2 Permselectivity Synthesized by Ammoniation.

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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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          Author and article information

          Journal
          Chemistry
          Chemistry (Weinheim an der Bergstrasse, Germany)
          Wiley-Blackwell
          1521-3765
          0947-6539
          May 04 2015
          : 21
          : 19
          Affiliations
          [1 ] Institute of Oceanic and, Environmental Chemical Engineering, College of Chemical Engineering and Material Science, Zhejiang University of Technology, Hangzhou 310014 (P.R. China).
          Article
          10.1002/chem.201500007
          25810142
          6f1bca81-8c0b-4734-a8a1-ff23c5dcdabd
          History

          hydrogen,membranes,metal-organic frameworks,nanoparticles,polymers

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