Customizing multiple superlyophobic surfaces in water-oil-air systems: From controllable preparation to smart switching via manipulating heterogeneous surface chemistry

•Three kinds of multiple superlyophobic surfaces are prepared controllably.•Superwetting behaviors of water and oil droplets in air are regulated.•Heterogeneous surface chemistry is tuned by reconstruction of the bilayer components.•Smart switching among these multiple superlyophobicity is achieved.•Ternary superlyophobic membrane is used for on-demand emulsion separation.