Affiliation:
1. ERC of Membrane and Water Treatment (MOE) College of Chemical and Biological Engineering Zhejiang University Hangzhou 310058 P. R. China
2. Department of Chemical System Engineering The University of Tokyo Tokyo 113-8656 Japan
Abstract
AbstractHighly b‐oriented MFI zeolite (abbreviated as BOMZ) membranes are attractive due to less grain boundary defects and straight channels normal to the substrate, enhancing selectivity and flux in membrane separation. Herein, we demonstrate a novel, effective and easily‐amplified printing‐transfer oriented‐seed‐layer technique to manufacture uniform BOMZ seed monolayer on porous supports. Furthermore, a facile and effective approach for the synthesis of highly BOMZ membranes by introducing poly(hexamethylene biguanide) hydrochloride as a twin crystal inhibitor during seeded growth is demonstrated. Well‐intergrown BOMZ membranes (∼650 nm thick) obtained on porous Al2O3 supports show a flux of 2.8 kg m−2 h−1 with a separation factor as high as 71 for pervaporation in the 60 °C feed of EtOH/H2O (5 wt%), which is much higher than those of random membranes. The developed seed assembly technique on porous supports underlines great potential for facile preparation of oriented seed layers on porous supports.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
General Chemistry,Biochemistry,Organic Chemistry
Cited by
1 articles.
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