Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 15, Pages 12821-12826Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am502809h
Keywords
solvent-manipulated; superhydrophobic-and-superhydrophilic switching; stearic acid; tetrahydrofuran; controllable oil/water separation; reversible oil/water separation
Funding
- National Natural Science Foundation [51173099, 21134004]
- National High Technology Research and Development Program of China [2012AA030306]
- National Research Fund for Fundamental Key Projects [2011CB925700]
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A controllable oil/water separation mesh has been successfully developed and easily manipulated by immersion in a stearic acid ethanol solution and tetrahydrofuran with a very short period of time. The superhydrophilic and underwater superoleophobic mesh is first obtained via a one-step chemical oxidation and subsequently converts to superhydrophobic after it is immersed in an ethanol solution of stearic acid for 5 min. The surface wettability is regained to superhydrophilic quickly by immersion in tetrahydrofuran for S min. More importantly, the reversible superhydrophobic-and-superhydrophilic switching can be repeated multiple times with almost no visible morphology variation. Therefore, this approach provides potential application in controllable oil/water separation and opens up new perspectives in manipulation of various metallic oxide substrates.
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