Premium
Formation of Ultrathin, Continuous Metal–Organic Framework Membranes on Flexible Polymer Substrates
Author(s) -
Hou Jingwei,
Sutrisna Putu D.,
Zhang Yatao,
Chen Vicki
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201511340
Subject(s) - membrane , metal organic framework , zeolitic imidazolate framework , permeance , fabrication , materials science , nanotechnology , chemical engineering , polymer , porosity , imidazolate , selectivity , semipermeable membrane , permeation , chemistry , organic chemistry , composite material , catalysis , adsorption , medicine , biochemistry , alternative medicine , pathology , engineering
Metal–organic framework (MOF) materials have an enormous potential in separation applications, but to realize their potential as semipermeable membranes they need to be assembled into thin continuous macroscopic films for fabrication into devices. By using a facile immersion technique, we prepared ultrathin, continuous zeolitic imidazolate framework (ZIF‐8) membranes on titania‐functionalized porous polymeric supports. The coherent ZIF‐8 layer was surprisingly flexible and adhered well to the support, and the composite membrane could sustain bending and elongation. The membranes exhibited molecular sieving behavior, close to the theoretical permeability of ZIF‐8, with hydrogen permeance up to 201×10 −7 mol m −2 s −1 Pa −1 and an ideal H 2 /CO 2 selectivity of 7:1. This approach offers significant opportunities to exploit the unique properties of MOFs in the fabrication of separation and sensing devices.