Method of constructing solid slippery surface

A method of constructing a solid slippery surface, comprising:

• (1) constructing a metal oxide coating on the surface of a metal substrate by anodic oxidation, and then modifying the metal oxide coating using a low surface energy material to afford a superhydrophobic coating;
• and
• (2) fulling mixing photothermal nanoparticles and solid paraffin, followed by infusing the mixture onto the surface of said superhydrophobic coating to afford said solid slippery surface;
• wherein said photothermal nanoparticles are graphene oxide-supported ferric oxide nanoparticles;
• wherein a process of preparing said photothermal nanoparticles specifically comprises adding a mixture solution of a ferric salt and a ferrous salt in a graphene oxide solution, adjusting the pH value to alkaline after mixing, stirring the mixture for reaction, separating a precipitate to afford said photothermal nanoparticles;
• and
• wherein a mass ratio of the ferric salt to the ferrous salt in said mixture solution is 5-9:3;
• said ferric salt is FeCl3;
• said ferrous salt is FeCl2;
• and a ratio of the total mass of the ferric salt and the ferrous salt in said mixture solution to the mass of graphene oxide in the graphene oxide solution is 15-50:1.