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Reversibly switching water droplets wettability on hierarchical structured Cu(2)S mesh for efficient oil/water separation

Surfaces with reversible wettability have broad applications but remain challenging since the switching process is usually energy intensive and complex. In this paper, a pyramid shaped Cu(2)S film with hierarchical micro/nanostructures is formed on a commercial copper mesh. This film is formed by a...

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Detalles Bibliográficos
Autores principales: Xu, Shanya, Sheng, Rui, Cao, Yali, Yan, Junfeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6713748/
https://www.ncbi.nlm.nih.gov/pubmed/31462670
http://dx.doi.org/10.1038/s41598-019-48952-1
Descripción
Sumario:Surfaces with reversible wettability have broad applications but remain challenging since the switching process is usually energy intensive and complex. In this paper, a pyramid shaped Cu(2)S film with hierarchical micro/nanostructures is formed on a commercial copper mesh. This film is formed by a spontaneous redox sulfuration reaction and results in a roughened surface, which enables reversible wetting transition between superhydrophilicity to superhydrophobicity. This switching occurs by simple processes such as alternately storing in air or using an ethanol solution treatment and yields cyclic wettability switching for many cycles. This convenient wetting transition behavior, as well as strong stability and efficient oil/water separation with efficiency exceeding 98%, renders it as a potentially useful mesh material for switchable surfaces.