Instant-heating and quick-warming polyurethane thermal insulation fiber as well as preparation method and application thereof

The invention provides an instant-heating and quick-warming polyurethane thermal insulation fiber and a preparation method and application thereof.The polyurethane thermal insulation fiber is obtained by conducting electrostatic spinning on a spinning solution, the spinning solution comprises a polyurethane solution, carbon nanotubes, ceramic powder and a rare earth material, and the polyurethane solution is selected as a main body material; according to the polyurethane thermal insulation fiber, the three thermal insulation fillers, namely the carbon nano tube, the ceramic powder and the rare earth material, are matched to generate a synergistic effect, so that the obtained polyurethane thermal insulation fiber has excellent light absorption and heating warmth retention property and far infrared warmth retention property, namely, has an excellent instant-heating and quick-warming effect, and is suitable for preparing winter cold-proof and warm-keeping clothes. 本发明提供一种即热速暖的聚氨酯保温纤维及其制备方法和应用，所述聚氨酯保暖纤维由纺丝液经静电纺丝得