▎ 摘　　要

NOVELTY - Preparation of high-efficiency antibacterial coatings based on physical vapor deposition, involves (S1) spraying treatment agent on the surface of a substrate, and spraying polyurethane primer to form a primer layer, (S2) placing substrate treated in step S1 in a vacuum furnace for plasma glow treatment, and forming a coating layer with a film thickness of 0.02-0.05mum on the primer layer, (S3) spraying polyurethane paint containing pigment particles on the surface of the coating layer to form a medium paint layer with a thickness of 5-8 mum, (S4) spraying a polyurethane topcoat containing an antibacterial agent on the surface of the middle paint layer to form a topcoat layer. USE - Preparation of high-efficiency antibacterial coatings based on physical vapor deposition used in fields of hardware, home appliances, sanitary ware and auto components. ADVANTAGE - The antibacterial coating with high potential difference effect is obtained, and the surface contains a coating with the effect of natural photocatalytic organic pollutants such as perspiration or lipid fingerprints remaining on the surface of the component, at the same time, has antibacterial and degraded organic pollutants on the surface, and achieves the double effect of self-cleaning. DETAILED DESCRIPTION - Preparation of high-efficiency antibacterial coatings based on physical vapor deposition, involves (S1) spraying treatment agent on the surface of a substrate, and spraying polyurethane primer to form a primer layer, where the polyurethane primer is composed of 15-25 pts. wt. butyl acrylate-methyl methacrylate copolymer, 30-45 pts. wt. chlorinated polyethylene, 10-20 pts. wt. styrene-butadiene-styrene ternary block copolymer and 10-15 pts. wt. polycaprolactam share, (S2) placing substrate treated in step S1 in a vacuum furnace for plasma glow treatment, and forming a coating layer with a film thickness of 0.02-0.05 mum on the primer layer, where the coating layer is composed of 25-35 pts. wt. aluminum, 5-15 pts. wt. chromium, 4-8 pts. wt. copper, 4-8 pts. wt. titanium, 6-10 pts. wt. silver, 0.04-0.08 pts. wt. niobium, 0.02-0.06 pts. wt. nickel, 0.03-0.07 pts. wt. rare earths, 0.01-0.05 pts. wt. palladium, (S3) spraying polyurethane paint containing pigment particles on the surface of the coating layer to form a medium paint layer with a thickness of 5-8 mum, where the polyurethane paint containing pigment particles is composed of 10-20 pts. wt. branched polyester polyol, 10-20 pts. wt. hydroxy polyacrylate, 12-24 pts. wt. aliphatic isocyanate, 3-10 pts. wt. dipentaerythritol pentaacrylate or dipentaerythritol hexaacrylate,e, 0.1-0.5 pts. wt. additives, 30-60 pts. wt. solvents, 1-5 pts. wt. pigment particles, (S4) spraying a polyurethane topcoat containing an antibacterial agent on the surface of the middle paint layer to form a topcoat layer, where the polyurethane topcoat containing antibacterial agent is composed of 20-40 pts. wt. polyurethane, 20-40 pts. wt. epoxy resin, 10-20 pts. wt. acrylic monomers, 4-6 pts. wt. nano titanium dioxide, 1-5 pts. wt. nano antistatic material, 1-5 pts. wt. nano-corrosion-resistant materials, 1-5 pts. wt. nano wear-resistant materials, 1-5 pts. wt. curing agent, 1-5 pts. wt. thickener, 4-8 pts. wt. coupling agent, baking substrate and curing by UV light after spraying the treatment agent and before spraying the PVD primer.