Preparation method of antibacterial nano material

The invention relates to a preparation method of an antibacterial nano material. The preparation method of the antibacterial nano material comprises the following steps: 1) after heating and stirringan adhesive, dehydrating to obtain a resultant A; 2) after stirring a spherical antiblocking agent, silver oxide, polyhexamethylguanidine stearate and the resultant A, heating and carrying out vacuumtreatment, dehydrating after vacuum treatment, then guiding in a rubber mixing mill and adding N-methyl diethanolamine to obtain a resultant B; 3) after grinding and stirring a nano iron and titaniumdioxide composite material, a surfactant and deionized water, adding copper oxide and limestone, and stirring to obtain a resultant C; and 4) after uniformly stirring the resultant B, the resultant C,2,6-toluene diisocyanate, a hydrophilic chain extender and a salt-forming agent, and carrying out extrusion and forming to obtain the antibacterial nano material. The problem that nano titanium dioxide is easy to agglomerate in