Magnetic fiber material, preparation method for same, and applications thereof

Patent metadata

Field	Value
Publication number	US-12258682-B2
Application number	US-202017784968-A
Country	US
Kind code	B2
Filing date	Oct 20, 2020
Priority date	Jan 10, 2020
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

The present invention belongs to the field of functional fibrous materials, and discloses a magnetic fibrous material and a preparation method and application thereof. A polymer and a magnetic load raw material are dissolved in a solvent to obtain a uniform spinning solution; a solute component that reacts with the magnetic load raw material is added into a coagulation bath solvent to obtain a reactive coagulation bath solution; the spinning solution is electrospun, and the produced fiber is collected with the reactive coagulation bath solution, so that the magnetic load raw material in the fiber reacts in situ with the solute in the reactive coagulation bath solution to obtain the magnetic fibrous material.

First claim

The invention claimed is:

1. A method for preparing magnetic
fibrous materials, comprising:
(1) preparation of a spinning solution: comprising dissolving a polymer and a magnetic load raw material in a solvent to obtain a uniform spinning solution, wherein the polymer is at least one of the following substances: polyethylene terephthalate, polyvinyl alcohol, and polystyrene-polybutadiene-polystyrene block copolymer;
(2) preparation of a reactive coagulation bath solution comprising adding a solute component that reacts with the magnetic load raw material into a coagulation bath solvent to obtain a uniform reactive coagulation bath solution; and
(3) electrospinning the uniform spinning solution obtained in step (1) to produce fiber, and collecting the produced fiber with the uniform reactive coagulation bath solution obtained in step (2), so that the magnetic load raw material in the fiber reacts in situ in situ with the solute in the uniform reactive coagulation bath solution to obtain the magnetic fibrous material.

2. The method for preparing magnetic fibrous materials according to claim 1 , wherein a mass fraction of the polymer in the spinning solution is 1% to 40%.

3. The method for preparing magnetic fibrous materials according to claim 1 , wherein the magnetic load raw material in step (1) is at least one of the chloride, oxide, nitrate and sulfate of iron, nickel, aluminum, manganese, copper and lanthanide metals; and the amount of the magnetic load raw material added is 0.001% to 10% by mass of that of the polymer.

4. The method for preparing magnetic fibrous materials according to claim 1 , wherein the solvent in step (1) is one or a mixture of two or more of the following substances: water, dichloromethane, chloroform, dichloroethane, tetrachloroethane, methyl acrylate, tetrahydrofuran, methyltetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, ether, petroleum ether, acetone, formic acid, acetic acid, trifluoroacetic acid, carbon tetrachloride, xylene, toluene, phenol, chlorobenzene, nitrobenzene, pentane, n-hexane, methylcyclohexane, N-methylpyrrolidone, anisole, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, pentanol, N-methylmorpholine-N-oxide, methylimidazole chloride, and cresol.

5. The method for preparing magnetic fibrous materials according to claim 1 , wherein the coagulation bath solvent in step (2) is one or a mixture of two or more of the following substances: water, dichloromethane, chloroform, dichloroethane, tetrachloroethane, methyl acrylate, tetrahydrofuran, methyltetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, ether, petroleum ether, acetone, formic acid, acetic acid, trifluoroacetic acid, carbon tetrachloride, xylene, toluene, phenol, chlorobenzene, nitrobenzene, pentane, n-hexane, methylcyclohexane, N-methylpyrrolidone, anisole, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, pentanol, N-methylmorpholine-N-oxide, methylimidazole chloride, and cresol.

6. The method for preparing magnetic fibrous materials according to claim 1 , wherein the conditions for the electrospinning in step (3) are as follows: voltage of a spinneret is 0.5-50 kV, and voltage of the uniform reactive coagulation bath solution is 0-50 kV; a distance between the spinneret and the uniform reactive coagulation bath solution is 5-50 cm, and the uniform spinning solution supply speed is 0.1-30 mL/h; during the spinning, an ambient temperature is 5° C. to 60° C., and a relative humidity is 25% to 95%.

7. The method for preparing magnetic fibrous materials according to claim 1 , wherein during the electrospinning in step (3), it is necessary to continuously supplement the uniform reactive coagulation bath solution to ensure the stability of its component ratio.

8. The method of preparing magnetic fibrous material according to claim 1 , wherein the magnetic material is monodispersed in the fiber.

Assignees

• Univ South China Tech

Inventors

• Wang Linge
• Jia Yifan
• Yu Qianqian
• Wu Yang

Classifications

• D01F6/94

  of other polycondensation products · CPC title

• D01F11/00

  Chemical after-treatment of artificial filaments or the like during manufacture · CPC title

• D01F6/92 Primary

  of polyesters · CPC title

• D01F6/44

  from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds · CPC title

• D01F6/50

  of polyalcohols, polyacetals or polyketals · CPC title