title: Wrinkled Graphene Monoliths as Superabsorbing Building Blocks for Superhydrophobic and Superhydrophilic Surfaces.
abstract: Superhydrophobic and superhydrophilic surfaces are of great interest because of a large range of applications, for example, as antifogging and self-cleaning coatings, as antibiofouling paints for boats, in metal refining, and for water-oil separation. An aqueous ink based on three-dimensional graphene monoliths (Gr) can be used for constructing both superhydrophobic and superhydrophilic surfaces on arbitrary substrates with different surficial structures from the meso- to the macroscale. The surface wettability of a Gr-coated surface mainly depends on which additional layers (air for a superhydrophobic surface and water for a superhydrophilic surface) are adsorbed on the surface of the graphene sheets. Switching a Gr-coated surface between being superhydrophobic and superhydrophilic can thus be easily achieved by drying and prewetting with ethanol. The Gr-based superhydrophobic membranes or films should have great potential as efficient separators for fast and gravity-driven oil-water separation.
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China).
authors.forename: Li-Bing
authors.initials: LB
authors.lastname: Lv
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China).
authors.forename: Tian-Lu
authors.initials: TL
authors.lastname: Cui
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China).
authors.forename: Bing
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China).
authors.forename: Hong-Hui
authors.initials: HH
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China). xinhaoli@sjtu.edu.cn.
authors.forename: Xin-Hao
authors.initials: XH
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (P. R. China). chemcj@sjtu.edu.cn.
authors.forename: Jie-Sheng
authors.initials: JS
authors.lastname: Chen
keywords: graphene; oil-water separation; superabsorbers; superhydrophilicity; superhydrophobicity