Polyurethane master batch based on composite antibacterial biochar nanomaterial and preparation method of polyurethane master batch

The invention provides a preparation method of a polyurethane master batch based on a composite antibacterial biochar nanomaterial. The preparation method comprises the following steps: preparing a modified photonic crystal material, preparing a porous activated carbon material, preparing the composite antibacterial nanomaterial and preparing the polyurethane master batch based on the composite antibacterial nanomaterial. The porous activated carbon material and the modified photonic crystal material are mixed and reacted, so that covalent linkage such as hydrogen bonds, amido bonds and ester bonds can be formed between the porous activated carbon material and the modified photonic crystal material. The modified photonic crystal material and the porous activated carbon material are subjected to effective covalent coupling to form a functional group which has the functions of enrichment of microorganisms such as bacteria and photothermal conversion, and efficient bacteriostasis and sterilization are facilitate