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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 the problems of insufficient magnetic characteristics, insufficient saturation magnetization, insufficient stability, etc., and achieve good magnetic responsiveness, magnetization saturation, The effect of good dispersion stability

Inactive Publication Date: 2019-01-08
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

[0033] Monodisperse polystyrene particles with a particle size of 1um were prepared by dispersion polymerization, and the mixed solution of ferric salt and ferrous salt with a mass ratio of 2:1 was directly added to the aqueous solution of strong alkali sodium hydroxide, through chemical Co-precipitation method to prepare ferroferric oxide-coated polystyrene; use sol-gel method, high-temperature roasting and carbonization, and cover polystyrene polymer material layer on its surface; use hydrogen peroxide as oxidant, and prepare four Ferric oxide nanoparticles; add initiator, dissolve crosslinking agent in polystyrene mixed solvent, stir evenly, disperse with ultrasonic waves, seal and cool and let stand; heat to 160 degrees, high-speed stirring polymerization reaction for 5 hours; in fluid Ambient polymerization into microspheres. The saturation magnetization of the magnetic polymer microspheres is 32.42emu / g.

Embodiment 2

[0035] Monodispersed polyethylene glycol particles with a particle size of 1um are prepared by bulk polymerization, and 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, passed Preparation of ferric oxide-coated polystyrene by chemical co-precipitation method; use sol-gel method, high-temperature roasting and carbonization, and cover polyethylene glycol polymer material layer on its surface; use hydrogen peroxide as oxidant, through hydrogen peroxide oxidation hydrothermal method Preparation of Fe3O4 nanoparticles; adding initiator, dissolving the crosslinking agent into the mixed solvent in polystyrene, stirring evenly, dispersing by ultrasonic waves, sealing and cooling, and standing still; heating to 160 degrees, high-speed stirring polymerization reaction for 5 hours; Polymerizes into microspheres in a fluid environment. The saturation magnetization of the magnetic polyme...

Embodiment 3

[0037]Prepare monodisperse polyethylene glycol particles with a particle size of 2um by dispersion polymerization, and 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, passed Preparation of ferric oxide-coated polystyrene by chemical co-precipitation method; use sol-gel method, high-temperature roasting and carbonization, and cover polyethylene glycol polymer material layer on its surface; use hydrogen peroxide as oxidant, through hydrogen peroxide oxidation hydrothermal method Preparation of Fe3O4 nanoparticles; adding initiator, dissolving the crosslinking agent into the mixed solvent in polystyrene, stirring evenly, dispersing by ultrasonic waves, sealing and cooling, and standing still; heating to 160 degrees, high-speed stirring polymerization reaction for 5 hours; Polymerizes into microspheres in a fluid environment. The saturation magnetization of the magnetic poly...

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Abstract

The invention discloses magnetic polymer microspheres. The magnetic polymer microspheres are of spherical multilayer composite sandwich structures, consist of an organic polymer material and a magnetic material, and are characterized in that an outer shell and an inner layer are made of the organic polymer material; magnetic particles and a sandwich layer are made of the magnetic material; the magnetic particles are symmetrically and uniformly distributed between an organic polymer outer shell and a magnetic sandwich layer; the organic polymer material is arranged on each of the two sides of the sandwich layer.

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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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/14
CPCB01J13/14
Inventor 阳杨
Owner 湖南华腾制药有限公司
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