Nano-silver antibacterial material for food-grade and/or medical-grade packaging material and preparation method of nano-silver antibacterial material

The invention provides a nano-silver antibacterial material for a food-grade and/or medical-grade packaging material and a preparation method of the nano-silver antibacterial material, and relates to the field of nano-materials. The nano-silver antibacterial material provided by the invention is prepared from the following components in parts by weight: 0.08 to 0.10 part of nano-silver powder, 0.5 to 1.2 parts of epoxy resin, 0.1 to 0.5 part of diethylenetriamine, 10 to 20 parts of silicone oil, 15 to 25 parts of water-soluble chitosan and 40 to 50 parts of absolute ethyl alcohol. According to the preparation method, absolute ethyl alcohol is used as a solvent, nano silver powder, epoxy resin, diethylenetriamine, silicone oil and water-soluble chitosan are mixed to prepare the nano silver antibacterial material, and after the prepared nano silver antibacterial material is sprayed to the surface of an object and cured, inorganic nano silver can exert stable bactericidal performance; therefore, bacteria such as