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Abstract: By combining the advantages of the molecular imprinting technique and the membrane separation technique, molecularly imprinted membranes (MIMs) were studied to separate special target molecule-kaempferol, an important active pharmaceutical ingredient. The kaempferol MIMs were prepared by the liquid-solid phase inversion method. The effects of organic additives (normal propyl alcohol, PEG-400, PEG-1000 and PVP-K30) on gelation kinetics and kaempferol MIM properties were studied. Results showed that normal propyl alcohol and PEG-400 could generate micropores and accelerate the gelation speed, so the membranes had high rejection and low water flux. Different with both of them, when PEG-1000 or PVP-K30 were used, the membranes had the great water flux, and their gelation speed were slower than the above two. Normal propyl alcohol and PEG-1000 were picked to make MIMs and tested the influence to kaempferol MIM properties. It was shown that MIM which added PEG-1000 had the maximum adsorption equilibrium compared with which added normal propyl alcohol, blank-additive MIM and non-MIM for its high water flux, it was 549.7 μg/g, but high water flux could reduce its separation factor, the separation factor of MIMs which added PEG-1000 and normal propyl alcohol were 3.90 and 4.17, respectively
Template and target information: kaempferol
Author keywords: molecularly imprinted membrane, Organic additives, kaempferol, Membrane modified, adsorption