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Preparation method of nanofiber aerogel material with hard magnetism

A technology of nanofibers and magnetic nanoparticles, which is applied in the field of preparation of hard magnetic nanofiber airgel materials, can solve the problems such as the preparation method of hard magnetic nanofiber airgel materials, and achieve smooth fibers and strong adsorption , the effect of system stability

Active Publication Date: 2017-01-18
WUHAN TEXTILE UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, there is no report on the preparation method of hard magnetic nanofiber airgel materials

Method used

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  • Preparation method of nanofiber aerogel material with hard magnetism
  • Preparation method of nanofiber aerogel material with hard magnetism

Examples

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Embodiment 1

[0028] This embodiment discloses a method for preparing an airgel material with hard magnetic nanofibers, comprising the following steps:

[0029] 1) Preparation of composite particles: SrFe with a particle size of 30nm 12 o 19 Nanoparticles were placed in a quartz crucible, gradually heated to 650°C in a vacuum furnace, then kept for 2 hours, and then naturally cooled to room temperature to obtain magnetic nanoparticles in a demagnetized state; 5g of sodium dodecylbenzenesulfonate was dissolved at 20°C In 60g of isopropanol solution, get 10g of demagnetized state magnetic nanoparticles and disperse them in the isopropanol solution of sodium dodecylbenzenesulfonate, ultrasonic 2h, obtain the demagnetized state magnetic nano particle dispersion B that mixes uniformly; The ethylene-vinyl alcohol copolymer masterbatch is placed in 270g of isopropanol, stirred and heated at 80°C to dissolve, and the polymer solution C is prepared; then the magnetic nanoparticle dispersion B in th...

Embodiment 2

[0036] This embodiment discloses a method for preparing an airgel material with hard magnetic nanofibers, comprising the following steps:

[0037] 1) Preparation of composite particles: the particle size is 50nm Nd 2 Fe 14 B nanoparticles were placed in a quartz crucible, gradually heated to 800°C in a vacuum furnace, then kept for 3 hours, and then naturally cooled to room temperature to obtain magnetic nanoparticles in a demagnetized state; Dissolve in 60g of isopropanol solution, take 10g of demagnetized state magnetic nanoparticles and disperse them in the isopropanol solution of sodium dodecylbenzene sulfonate, ultrasonic 2h, obtain demagnetized state magnetic nano particle dispersion B which is mixed uniformly; Put 90g of ethylene-vinyl alcohol copolymer masterbatch in 300g of isopropanol, stir and heat at 85°C to dissolve, and prepare polymer solution C; then dissolve and disperse demagnetized magnetic nanoparticle dispersion B to the polymerization solution C, and th...

Embodiment 3

[0043] This embodiment discloses a method for preparing an airgel material with hard magnetic nanofibers, comprising the following steps:

[0044] 1) Preparation of composite particles: SrFe with a particle size of 30nm 12 o 19 Nanoparticles were placed in a quartz crucible, gradually heated to 650°C in a vacuum furnace, then kept for 2 hours, and then naturally cooled to room temperature to obtain magnetic nanoparticles in a demagnetized state; 5g of sodium dodecylbenzenesulfonate was dissolved at 20°C In 60g of isopropanol solution, get 10g of demagnetized state magnetic nanoparticles and disperse them in the isopropanol solution of sodium dodecylbenzenesulfonate, ultrasonic 2h, obtain the demagnetized state magnetic nano particle dispersion B that mixes uniformly; The ethylene-vinyl alcohol copolymer masterbatch is placed in 270g of isopropanol, stirred and heated at 80°C to dissolve, and the polymer solution C is prepared; then the magnetic nanoparticle dispersion B in th...

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Abstract

The invention discloses a preparation method of a nanofiber aerogel material with hard magnetism, and belongs to the field of nanofiber functional materials. The preparation method comprises the following steps: 1) preparing demagnetized composite particles; 2) blending the demagnetized composite material and cellulose acetate butyrate, performing melting extrusion and extracting to prepare composite nanofiber; 3) dissolving the composite nanofiber by using a solvent, mixing with a bonding agent, freezing and drying to prepare a composite nanofiber aerogel; 4) magnetizing the composite nanofiber aerogel. The preparation method is simple in process and pollution-free, and is suitable for industrial production; the prepared hard-magnetism aerogel has the advantages of superparamagnetism and relatively high strength, has the characteristics of a high specific surface area, high porosity, low heat conductivity and the like, and can be widely applied to the fields of air filtration, electromagnetic shielding, energy absorption and the like.

Description

technical field [0001] The invention belongs to the field of nanofiber functional materials, in particular to a preparation method of a hard magnetic nanofiber airgel material. Background technique [0002] Airgel material is a new type of lightweight porous material with a specific surface area of ​​200-1000m 2 / g, the porosity can reach 80%~99.8%; the density is about 0.003~1g / cm 2 (air density at 0.00129g / cm 2 ), has excellent characteristics such as low refractive index. The unique nanoscale and three-dimensional porous structure (pore size between 1 and 100nm) makes it have broad prospects in air filtration and heat insulation materials. Once magnetized, the hard magnetic material can maintain a constant magnetic field, with high resistivity, good stability, and strong resistance to environmental changes. Especially when the size of the hard magnetic material is 20nm to 100nm, it will have a large specific surface area and a large number of surface dangling bonds, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/06B01J20/24B01J20/264B01J20/28009B01J20/28047
Inventor 刘轲王栋易志兵刘琼珍李沐芳蒋海青鲁振坦赵青华
Owner WUHAN TEXTILE UNIV
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