Bio-Inspired Polydopamine: A Versatile and Powerful Platform for Covalent Synthesis of Molecular Sieve Membranes

Inspired by the bioadhesive ability of the marine mussel, a simple, versatile, and powerful synthesis strategy was developed to prepare highly reproducible and permselective molecular sieve membranes by using polydopamine as a novel covalent linker. Attributing to the formation of strong covalent an...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2013-11, Vol.135 (47), p.17679-17682
Main Authors: Liu, Qian, Wang, Nanyi, Caro, Jürgen, Huang, Aisheng
Format: Article
Language:English
Subjects:
Aluminum Oxide - chemistry
Animals
Biomimetic Materials - chemistry
Bivalvia - chemistry
Indoles - chemistry
Membranes, Artificial
Polymers - chemistry
Porosity
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Summary:Inspired by the bioadhesive ability of the marine mussel, a simple, versatile, and powerful synthesis strategy was developed to prepare highly reproducible and permselective molecular sieve membranes by using polydopamine as a novel covalent linker. Attributing to the formation of strong covalent and noncovalent bonds, ZIF-8 nutrients are attracted and bound to the support surface, thus promoting the ZIF-8 nucleation and the growth of uniform, well intergrown, and phase-pure ZIF-8 molecular sieve membranes. The developed ZIF-8 membranes show high hydrogen selectivity and thermal stability. At 150 °C and 1 bar, the mixture separation factors of H2/CO2, H2/N2, H2/CH4, and H2/C3H8 are 8.9, 16.2, 31.5 and 712.6, with H2 permeances higher than 1.8 × 10–7 mol·m–2·s–1·Pa–1, which is promising for hydrogen separation and purification.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja4080562