|Title:||Synthesis of ZIF-7/chitosan mixed-matrix membranes with improved separation performance of water/ethanol mixtures||Authors:||Kang C.-H.
|Keywords:||Metal-organic frameworks;Mixed-matrix membrane;Pervaparation;Zeolitic imidazolate frameworks||Issue Date:||2013||Journal Volume:||438||Start page/Pages:||105-111||Source:||Journal of Membrane Science||Abstract:||
In this study, microporous ZIF-7 crystal particles were successfully incorporated into chitosan (CS) membranes to form ZIF-7/CS mixed-matrix membranes (MMMs). The as-prepared ZIF-7/CS MMMs were used to separate mixtures of water/ethanol at 25. ¢XC in the pervaporation process. The different ZIF-7 loadings in CS polymer with 0.25. g GA, such as 2.5, 4, 5, 6 and 7.5. wt%, have been tried and ZIF-7 with 5. wt% loading is the best loading condition. The separation efficiency of MMMs with 5. wt% ZIF-7 incorporation showed 19 times higher than that of the pristine CS membranes because of the rigidified polymer chain of the MMMs. The separation factor and the flux of the ZIF-7/CS membranes clearly exceed the upper limit of the previously reported CS based membranes and MMMs. The present work demonstrates better pervaporation performance of the ZIF-7 incorporated CS MMMs for the separation of water and ethanol and the feasibility of using this system for pervaporation. ? 2013 Elsevier B.V.
|Appears in Collections:||化學工程學系|
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