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. 2013 Nov 27;135(47):17679-82.
doi: 10.1021/ja4080562. Epub 2013 Nov 15.

Bio-inspired polydopamine: a versatile and powerful platform for covalent synthesis of molecular sieve membranes

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Bio-inspired polydopamine: a versatile and powerful platform for covalent synthesis of molecular sieve membranes

Qian Liu et al. J Am Chem Soc. .

Abstract

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.

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