Magnetic response fiber material and its preparation method and application

A preparation method of a magnetic response fiber material, comprising:

• step (1), mixing a fiber-forming polymer, a primary solvent, a secondary solvent and magnetic nanoparticles to form a uniform spinning solution, wherein the fiber-forming polymer comprises at least one of polyethylene, polypropylene and polymethylpentene;
• the primary solvent comprises at least one of aliphatic hydrocarbon and halogenated hydrocarbon;
• the aliphatic hydrocarbon comprises at least one of n-hexane and butane;
• the halogenated hydrocarbon comprises at least one of dichloromethane and chloroform;
• the secondary solvent comprises at least one of alkane, nitrogen and carbon dioxide;
• the magnetic nanoparticles comprise at least one of iron oxide nanoparticles and nickel oxide nanoparticles;
• a diameter of the magnetic nanoparticles is in a range of 50-80 nanometers (nm);
• a mass ratio of the fiber-forming polymer to the magnetic nanoparticles is in a range of (9-10):(1-10);
• a mass-volume ratio of the fiber-forming polymer to the primary solvent is in a range of (1-2):(6-7) in terms of grams per milliliter (g/mL);
• and a mass ratio of the fiber-forming polymer to the secondary solvent is (1-2):(7-8);
• and
• step (2), spinning the spinning solution by a high-pressure electrospray spinning process to obtain the magnetic response fiber material, wherein conditions of the high-pressure electrospray spinning process comprise:
• temperature of 200-250° C., pressure of 10-15 megapascals (MPa), and stirring speed of 150-200 revolutions per minute (r/min).