The smart surfaces with reversible transformations from superhydrophobicity to superhydrophilicity

摘要

In this paper, a novel and recyclable method based on PC-Cu(OH)(2) was fabricated by combining nickel activation process and the hydrazine reduction chemical plating copper reaction system to separate oil/water mixture effective. The dodecoic acid and sodium hydroxide surface modification realized rapid wettability transition between superhydrophobicity and superhydrophilicity, which makes it possible to separate oil/water/oil mixture with no extra treatment. In addition, the separation efficiency could still remain high separation efficiency (-97.0%) after 80 separation cycles even under 5 times of reversible wettability transformation from superhydrophobicity to superhydrophilicity. This study may pave a novel strategy with a continuous process for handing oil spills and low-cost environmental protection with PC-Cu(OH)(2) in future work. (C) 2016 Published by Elsevier B.V.