Wettability switchable metal-organic framework membranes for pervaporation of water/ethanol mixtures |
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| Affiliation: | 1. College of Science, China University of Petroleum (East China), Qingdao, Shandong 266580, People''s Republic of China;2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao, Shandong 266580, People''s Republic of China |
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| Abstract: | To evaluate the effect of MOF surface wettability for the purification of ethanol from water/ethanol mixtures, the hydrophilic Ni2(l-asp)2bipy membrane is switched to hydrophobic Ni2(l-asp)2bipy@PDMS membrane via vapor deposition of PDMS. The PDMS coating can improve the hydrothermal stability of MOF membranes. The stable Ni2(l-asp)2bipy membrane exhibits a high flux of H2O and acceptable separation factor. The pervaporation studies based on the both two membranes provide insight into the effect of surface wettability on the bio-ethanol purification performance. |
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