▎ 摘　　要

NOVELTY - Preparation of super-hydrophobic-super-hydrophilic Janus foam copper evaporator involves (s1) mixing polydimethylsiloxane (PDMS), nano fumed silica and a nano carbon materials, adding organic solvent for dilution, and uniformly stirring to obtain a pre-spraying solution, (s2) adding an adhesive in pre-spraying solution and uniformly mixing to obtain a spraying solution, and (s3) spraying the spraying solution on one surface of clean foam copper, taking measures to prevent the spraying solution from permeating in other surface through pores of foam copper in the spraying process before spraying, selectively and repeatedly spraying the spraying solution for multiple times after drying sprayed surface, and thermo-curing. USE - Preparation of super-hydrophobic-super-hydrophilic Janus foam copper evaporator used in seawater desalination evaporation (all claimed). ADVANTAGE - The method has excellent light-absorbing and heat-absorbing characteristics and stable floatability, has better evaporation performance and salt-repelling ability, and the evaporation channels will not be blocked by deposited salt crystals, and can be used for a long time in seawater desalination.