Polyurethane/chitosan composite porous fiber and spinning method thereof

The invention provides a polyurethane/chitosan composite porous fiber and a spinning method thereof, a polyurethane solution and a chitosan solution with specific concentrations are prepared, a coaxial wet spinning technology is adopted, an outer shaft is the polyurethane solution, an inner shaft is the chitosan solution, a coagulating bath is a mixed solution of water, ethanol and alkali liquor, a nascent fiber is obtained through coagulation forming, and the polyurethane/chitosan composite porous fiber is prepared. And finally, carrying out vacuum freeze drying to obtain the polyurethane/chitosan composite porous fiber. The spinnability and formability of the fiber are adjusted by adjusting the concentration of the spinning solution, the forming process of the composite spinning solution is controlled through the synergistic effect of all the components in the coagulating bath, forming of the composite fiber is promoted, the coaxial structure of the composite fiber is not damaged, and successful preparation