Dual‐layer membrane with hierarchical hydrophobicity and transport channels for nonpolar organic solvent nanofiltration
Nonpolar solvent separation is widely used in petroleum, chemical, food industries, but traditional separation methods consume intensive energy. State‐of‐art organic solvent nanofiltration membranes require complex modifications for nonpolar solvent transport. For the first time, we propose the conc...
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Published in | AIChE journal Vol. 67; no. 4 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Hoboken, USA
John Wiley & Sons, Inc
01.04.2021
American Institute of Chemical Engineers |
Subjects | |
Online Access | Get full text |
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Summary: | Nonpolar solvent separation is widely used in petroleum, chemical, food industries, but traditional separation methods consume intensive energy. State‐of‐art organic solvent nanofiltration membranes require complex modifications for nonpolar solvent transport. For the first time, we propose the concurrent modification of the surface, interface and support layer of dual‐layer membranes with three additives (perfluorodecylamine, fluoro substituted aromatic amine, silica nanoparticles) in a one‐step cocasting process. A delamination‐free dual‐layer membrane was obtained with a hierarchical hydrophobicity and transport channels. The novel designed structure elevated the pure n‐hexane permeance (28.75 L m−2 hr−1 bar−1) by 3 orders of magnitude with a high lecithin rejection (98.7%). This method of synergistically controlling the hierarchical structures and properties of dual‐layer membranes can significantly shorten the preparation process of high‐performance nonpolar solvent nanofiltration membranes. |
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Bibliography: | Funding information Fok Ying Tung Education Foundation, Grant/Award Number: 171062; Foundation for Innovative Research Groups of the National Natural Science Foundation of China, Grant/Award Number: 21921006; Jiangsu Provincial Natural Science Fund Outstanding Youth Project, Grant/Award Number: BK20190037; National Natural Science Foundation of China, Grant/Award Number: 21878146; Priority Academic Program Development of Jiangsu Higher Education Institutions Zheng‐Jun Fu and Zhen‐Yuan Wang contributed equally to this study. |
ISSN: | 0001-1541 1547-5905 |
DOI: | 10.1002/aic.17138 |