Simultaneous spray self-assembly of highly loaded ZIF-8-PDMS nanohybrid membranes exhibiting exceptionally high biobutanol-permselective pervaporation.
The ability to obtain a maximum loading of inorganic nanoparticles while maintaining uniform dispersion in the polymer is the key to the fabrication of mixed-matrix membranes with high pervaporation performance in bioalcohol recovery from aqueous solution. Herein, we report the simultaneous spray self-assembly of a zeolitic imidazolate framework (ZIF)-polymer suspension and a cross-linker/catalyst solution as a method for the fabrication of a well-dispersed ZIF-8-PDMS nanohybrid membrane with an extremely high loading. The ZIF-8-PDMS membrane showed excellent biobutanol-permselective pervaporation performance. When the ZIF-8 loading was increased to 40 wt%, the total flux and separation factor could reach 4846.2 g m(-2) h(-1) and 81.6, respectively, in the recovery of n-butanol from 1.0 wt% aqueous solution (80 °C). This new method is expected to have serious implications for the preparation of defect-free mixed-matrix membranes for many applications.
Center for Membrane Technology, College of Environmental and Energy Engineering, Beijing University of Technology, West Dawang Road 100, 100124 Beijing (China).
Hongwei
H
Fan
Qi
Q
Shi
Hao
H
Yan
Shulan
S
Ji
Jinxiang
J
Dong
Guojun
G
Zhang
D056804:Biofuels; D000440:Butanols / Q000737:chemistry / Q000378:metabolism*; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D007093:Imidazoles / Q000737:chemistry; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D010539:Permeability; D013696:Temperature; D014867:Water / Q000737:chemistry; D017641:Zeolites / Q000737:chemistry*
D056804:Biofuels; D000440:Butanols; D004129:Dimethylpolysiloxanes; D005740:Gases; D007093:Imidazoles; D008567:Membranes, Artificial; D014867:Water; D017641:Zeolites; C029899:imidazole
butanol; mixed-matrix membranes; pervaporation; spray self-assembly; zeolites