Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 12, Issue 16, Pages 2085-2092Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201700488
Keywords
hydrophobic effect; nanostructures; oil/water separation; permeation; wettability
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Funding
- National Natural Science Foundation of China (NSFC) [21674030]
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Inspired by the special asymmetric wettability and controllable permeation function of cell membranes, we report a Janus nanostructured copper mesh film with unidirectional water transportation ability. Water can permeate from the hydrophobic side to the hydrophilic side, but is retained in the opposite direction. Notably, based on this special unidirectional water permeation property, both heavy oil/water mixtures (rho(oil) > rho(water)) and light oil/water mixtures (rho(oil) < rho(water)) can be separated. Additionally, the film demonstrates high separation efficiency and good recyclability. This paper reports a new Janus film that achieved highly efficient oil/water separation based on smart control of the wettability of the film. It is believed to have the potential to be used in many practical applications, such as wastewater treatment and oil-spill cleanup.
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