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 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.
Institute of New Energy Technology, Ningbo Institute of Material Technology and Engineering , CAS, 519 Zhuangshi Road, 315201 Ningbo, P. R. China.
Qian
Q
Liu
Nanyi
N
Wang
Jürgen
J
Caro
Aisheng
A
Huang
D000537:Aluminum Oxide / Q000737:chemistry*; D000818:Animals; D040761:Biomimetic Materials / Q000737:chemistry*; D049872:Bivalvia / Q000737:chemistry*; D007211:Indoles / Q000737:chemistry*; D008567:Membranes, Artificial; D011108:Polymers / Q000737:chemistry*; D016062:Porosity
D007211:Indoles; D008567:Membranes, Artificial; D011108:Polymers; C568283:polydopamine; D000537:Aluminum Oxide