Abstract
Stable functional surfaces with reversibly switchable wettability have recently been developed for the continuous separation of oil–water mixtures. This article proposes a facile method to fabricate superhydrophobic surfaces on copper meshes by combining poly(dimethylsiloxane) and graphene. The superhydrophobic surface can dramatically switch to a superhydrophilic state under O2 plasma etching and recover to a superhydrophobic state after laser etching to achieve unidirectional transport of oil or water. The surface had a high separation efficiency and favorable reusability in oil–water separation. In addition, the superhydrophobic surfaces demonstrated not only outstanding stability, including an anticorrosion ability, anti-UV exposure ability, oil contamination resistance, and abrasion resistance, but also an excellent self-healing ability after flame treatment. This research opens a novel avenue for the design of stable materials with reversible wettability that may have promising potential application...
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