Abstract
We have designed novel mixed matrix membranes (MMMs) consisting of UiO-66 nanoparticles and 6FDA-HAB/DABA polyimide for the dehydration of ethanol, isopropanol and n-butanol via pervaporation. The UiO-66 nanoparticles have a particle size of around 100nm. They can be evenly dispersed in the 6FDA-HAB/DABA polyimide matrix without visible agglomeration even at the highest 30wt% loading. The incorporation of UiO-66 into the 6FDA-HAB/DABA polyimide not only significantly enhances both free-volume radius and fractional free volume as confirmed by positron annihilation lifetime spectroscopy but also remarkably improves the normalized flux of MMMs for the dehydration of ethanol/water, isopropanol/water and n-butanol/water systems. The MMMs show excellent separation efficiency for the dehydration of isopropanol and n-butanol. At the highest UiO-66 loading of 30wt%, the MMMs have the water permeability of 0.329 and 0.292mgm−1h−1kPa−1 and mole-based selectivity of 2209 and 14214 respectively for isopropanol/water and n-butanol/water systems, outperforming most literature data. These experimental results strongly suggest the newly developed UiO-66/polyimide MMMs have great potential for isopropanol and n-butanol dehydration via pervaporation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
