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Magnetic polymer microsphere structure and preparation thereof

A technology of polymer microspheres and organic polymers, applied in the field of magnetic polymer microspheres, can solve problems such as insufficient stability, insufficient saturation magnetization, and insufficient magnetic characteristics, and achieve good magnetic responsiveness, saturation of magnetization, The effect of good dispersion stability

Inactive Publication Date: 2018-12-28
湖南华腾制药有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The shortcoming of the structural design of the above-mentioned microspheres is that they cannot introduce enough magnetic components, so their magnetic characteristics are not prominent enough, and the saturation magnetization is not enough, and the stability is not enough.

Method used

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  • Magnetic polymer microsphere structure and preparation thereof
  • Magnetic polymer microsphere structure and preparation thereof
  • Magnetic polymer microsphere structure and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The mixed solution of ferric salt and ferrous salt with a mass ratio of 2:1 is directly added to the aqueous solution of strong alkali sodium hydroxide, and ferric oxide nanoparticles are prepared by chemical co-precipitation method, with a particle size of 1um; Using the sol-gel method, high-temperature roasting and carbonization, the surface is covered with a polystyrene polymer material layer; hydrogen peroxide is used as the oxidant, and ferric oxide nanoparticles are prepared by the hydrogen peroxide oxidation hydrothermal method; the initiator is added, and the cross-linking agent is dissolved Put it into the mixed solvent in polystyrene, stir evenly, disperse with ultrasonic wave, seal and cool and let it stand still; heat to 160 degrees, high-speed stirring polymerization reaction for 5 hours; polymerization reaction into microspheres in fluid environment. The saturation magnetization of the magnetic polymer microspheres is 32.42emu / g.

Embodiment 2

[0034] The mixed solution of ferric salt and ferrous salt with a mass ratio of 2:1 is directly added to the aqueous solution of strong alkali potassium hydroxide, and ferric oxide nanoparticles are prepared by chemical co-precipitation method, with a particle size of 2um; Using the sol-gel method, high-temperature roasting and carbonization, covering the polyethylene glycol polymer material layer on the surface; using hydrogen peroxide as the oxidant, preparing ferric oxide nanoparticles by hydrogen peroxide oxidation hydrothermal method; adding initiators and crosslinking agents Dissolve in a mixed solvent of polyethylene glycol, stir evenly, disperse with ultrasonic waves, seal and cool and let stand; heat to 160 degrees, high-speed stirring polymerization reaction for 5 hours; polymerization reaction into microspheres in a fluid environment. The saturation magnetization of the magnetic polymer microspheres is 35.03emu / g.

Embodiment 3

[0036]The mixed solution of ferric salt and ferrous salt with a mass ratio of 2:1 is directly added to the aqueous solution of strong alkali calcium hydroxide, and ferric oxide nanoparticles are prepared by chemical co-precipitation method, with a particle size of 1um; Using the sol-gel method, high-temperature roasting and carbonization, covering the polyethylene glycol polymer material layer on the surface; using hydrogen peroxide as the oxidant, preparing ferric oxide nanoparticles by hydrogen peroxide oxidation hydrothermal method; adding initiators and crosslinking agents Dissolve in a mixed solvent of polyethylene glycol, stir evenly, disperse with ultrasonic waves, seal and cool and let stand; heat to 160 degrees, high-speed stirring polymerization reaction for 5 hours; polymerization reaction into microspheres in a fluid environment. The saturation magnetization of the magnetic polymer microspheres is 33.49emu / g.

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Abstract

The invention relates to a magnetic polymer microsphere spherical multi-layer composite sandwich structure composed of an organic polymer material and a magnetic material. The structure comprises an outer shell layer, a small magnetic particle layer and a magnetic main core layer and is characterized in that the organic polymer material forms the outer shell layer, small magnetic particles are uniformly and symmetrically distributed between the outer shell layer and the magnetic main core layer, and the magnetic particle layer is located at the sphere center.

Description

technical field [0001] This application relates to polymer biology, in particular to magnetic polymer microspheres. Background technique [0002] The core-shell magnetic microsphere is a special functional material that wraps another material through chemical bonds or other interactions to form an ordered assembly structure. It has a wide range of applications in the fields of catalysis, biomedicine, electrochemistry, optics and separation application prospects. Compared with single-component materials, composite materials with core-shell structure are easier to obtain new functions through chemical modification or physical modification of the core or shell. Magnetic composite microspheres with a core-shell structure, such as ferroferric oxide multifunctional microspheres with a core-shell structure, have attracted much attention because of their targeting function with an external magnetic field, magnetic hyperthermia function and nuclear magnetic imaging function. Since ...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01J13/14B01J13/06
CPCB01J13/02B01J13/06B01J13/14
Inventor 阳杨
Owner 湖南华腾制药有限公司
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