Copper nano composite antibacterial coating and preparation method thereof

The invention provides a copper nano composite antibacterial coating and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a copper nano colloid by adopting a chemical reducing method, and performing centrifuging and drying to obtain copper nanopowder; S2, uniformly dispersing the copper nanopowder in electrostatic spraying powder to obtain copper nano composite antibacterial powder; and S3, spraying the copper nano composite antibacterial powder on the metal surface by adopting an electrostatic spraying process to form the copper nano compositeantibacterial coating on the metal surface. The copper nano composite antibacterial coating prepared according to the preparation method is high in antibacterial performance, is non-toxic and tasteless, and is not likely to change in color, is simple in preparation process, is lower in cost, and has a great application prospect in the surface coating field of metal products in home appliances, file cabinets, medical devic