Abstract
Abstract Submicron PAF-56 particles with narrow size-distribution were prepared by bottom-up method for the first time, and incorporated in polydimethylsiloxane (PDMS) membranes for pervaporation of 5% n-butanol solution. The effects of PAF-56 loading on the hydrophilicity, swelling degree, partition coefficient and pervaporation performance of the mixed matrix membranes (MMMs) were studied. It was found that, the PAF-56/PDMS MMMs displayed n-butanol sorption-selectivity, and the permeation flux and separation factor increased with the decreased PAF-56 particles size at the same loading, demonstrating size-effects of PAF-56 particles. With the increased PAF-56 loading, the permeation flux and separation factor exhibited maximum values at 2–2.5% loading. For MMMs with PAF-56 size of 0.83 μm and 2.5 wt% loading, the separation factor and permeation fluxes were 48.4 and 1906 g m−2 h−1 (increased by 183% and 66% in comparison with that of pristine PDMS membrane), indicating great potential in recovery of n-butanol.
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