Applications of hard, durable, mass-produced fluorine grafted graphene based superhydrophobic coating in effective oil-water separation at severe environment

The invention discloses applications of a hard, durable, mass-produced fluorine grafted graphene based superhydrophobic coating in effective oil-water separation at a severe environment. A material with special wettability is prepared via a simple, low-cost, high-efficiency method which is convenient for enlarged production, and applications of the material in effective oil-water separation at a severe environment is a huge challenge. The invention discloses a fluorine grafted graphene based coating prepared via a simple dip-coating method. The fluorine grafted graphene based coating is capable of resisting harsh practical environment such as boiling water, high acidity, high alkalinity, and saturated salt solutions. Coated foams are capable of absorbing oil in an oil/water mixture, and possess excellent absorption capacity. It is more important that coated film is capable of separating stable water-in-oil emulsion of surfactants only at gravity action, possesses excellent cycle performance, is large in flux.