Zeolitic imidazolate frameworks (ZIF-8) nanoparticles were successfully synthesized and embedded into a chitosan (CS) polymeric matrix to prepare CS/ZIF-8 mixed-matrix membranes (MMMs) in order to investigate the effect of ZIF-8 addition as novel filler on the dehydration performance of the CS polymeric membrane. MMMs were evaluated using pervaporation (PV) dehydration of isopropanol (IPA). The synthesized ZIF-8 nanoparticles and MMMs were characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, and a swelling study. The PV performance of the prepared MMMs with different ZIF-8 loadings for IPA dehydration was investigated. For the ZIF-8/CS MMMs, at the optimum loading the total flux increases significantly with low separation factor reduction. The good PV performance of the ZIF-8-incorporated CS membranes for dehydration of IPA is demonstrated.
a b s t r a c tIn this study, zeolitic imidazolate framework-8 (ZIF-8) nanoparticles were successfully synthesized and embedded into P84 polymeric matrix to prepare P84/ZIF-8 mixed matrix membranes (MMMs) to investigate the effect of ZIF-8 addition as a new filler on dehydration performance of the P84 polymeric membrane. MMMs were evaluated using pervaporation (PV) dehydration of isopropanol (IPA). Synthesized ZIF-8 nanoparticles and MMMs were characterized by X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and swelling study. PV performance of the prepared MMMs with various ZIF-8 loadings such as 2.5, 5, 7.5 and 10 wt%, for IPA dehydration was investigated at 25°C. The results showed that for the ZIF-8/P84 MMMs at the optimum loading (5 wt%), the total flux increases 11% without any reduction in separation factor. The present work demonstrates good PV performance of the ZIF-8 incorporated MMMs for dehydration of IPA.
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