Journal
AICHE JOURNAL
Volume 63, Issue 4, Pages 1272-1277Publisher
WILEY
DOI: 10.1002/aic.15500
Keywords
phase inversion tape casting; full-inorganic membrane; robust hydrophobicity; zero-change water desalination; long-term stability
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Funding
- National Natural Science Foundation of China [51372238, 21271164]
- CAS Strategic Priority Research Program [XDB10030402]
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Membrane distillation water desalination can attain a significantly higher water recovery than reverse osmosis, while the lack of stable hydrophobic membranes limits its commercial applications. This article presents the preparation of a new hydrophobic membrane by modifying a porous Si3N4 substrate with vesicular SiNCO nano-particles. The membrane had a water contact angle of 1428, due to the presence of -Si-CH3 terminal groups and the high surface roughness. The contact angle remained nearly the same after exposures of the membrane to boiling water, aqueous solutions with pH ranging from 2 to 12, and benzene. The membrane exhibited satisfactory water desalination performance on highly concentrated NaCl solutions and simulated seawater. With the highly stable membrane, it is promising to develop a zero-discharge water desalination process for simultaneous production of fresh water for daily uses and brine for industrial uses. (C) 2016 American Institute of Chemical Engineers AIChE J, 63: 1272-1277, 2017
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