Application of phosphorus-contained ionic liquid to polyurethane complex fiber

The invention discloses application of phosphorus-contained ionic liquid to a polyurethane complex fiber. The phosphorus-contained ionic liquid, as antibacterial additive, is applied to the polyurethane complex fiber. The polyurethane complex fiber added with the phosphorus-contained ionic liquid has excellent bacteriostasis and sterilization characteristics for staphylococcus aureus of Gram positive bacteria and escherichia coli of Gram negative bacteria; and a polyurethane nanometer complex fiber film has excellent mechanical property, and has higher tensile strength and greater elongation at break. An antibacterial polyurethane complex fiber film can be applied to such fields as medicine, biology, environmental protection and textile.