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Method for preparing magnetic particle with level hole structure

A technology of magnetic particles and hierarchical holes, which is applied to the magnetism of organic materials/organic magnetic materials, inductance/transformer/magnet manufacturing, nanotechnology for materials and surface science, etc., can solve single problems, achieve simple process, The effect of uniform particle size and simple equipment

Inactive Publication Date: 2014-11-19
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, magnetic egg yolk-eggshell particles are composed of mesoporous porous spherical shells (such as silica or carbon hollow spherical shells) and magnetic cores (such as ferroferric oxide) ([1] Yong G, LiuSM.One- potsynthesisofyolk–shellmesoporouscarbonsphereswithhighmagnetisation[J].Journal ofMaterialsChemistryA,2014;[2]KongSD,ZhangW,LeeJH,etal.Magneticallyvectorednanocapsules fortumorpenetrationandremotelyswitchableon-demanddrugrelease[J].Nanoletters,2010,10(12):5088-5092),因此其孔结构主要 is the pore structure of the shell, relatively simple

Method used

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  • Method for preparing magnetic particle with level hole structure
  • Method for preparing magnetic particle with level hole structure
  • Method for preparing magnetic particle with level hole structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of egg yolk-eggshell structured carbon micro-nano particles. Weigh 3.88g resorcinol, 5.2ml formaldehyde, mix and stir for 1 hour, add 30ml deionized water, mix and stir for 2 hours to form a uniform carbon precursor solution, measure 15ml polymer hollow microspheres, stir and mix and place at room temperature for 24 Hour. Centrifugal cleaning, adding 15ml of water and concentrated sulfuric acid, stirring and mixing evenly, standing at room temperature for 12 hours, centrifuging and cleaning to obtain particles with a core-shell structure. Add 5 g of saturated ferric chloride solution into 100 ml of boiling water and continue to boil until the solution turns reddish brown, cool down, and add 0.5 g of tetraethyl orthosilicate. The above-mentioned core-shell particle product was slowly added dropwise, and continued to boil for 1 hour. After the reaction was completed, it was washed and centrifuged. The sandwich structure composite particles of resin-polymer-m...

Embodiment 2

[0027] Preparation of egg yolk-eggshell structure micro-nano carbon particles. Weigh 7.76g resorcinol, 11ml formaldehyde, mix and stir for 1 hour, add 30ml deionized water, mix and stir for 2 hours to form a uniform carbon precursor solution, measure 15ml polymer hollow microspheres, stir and mix and place at room temperature for 24 hours . Centrifugal cleaning, adding 15ml of water and concentrated sulfuric acid, stirring and mixing evenly, standing at room temperature for 12 hours, centrifuging and cleaning to obtain particles with a core-shell structure. Add 10g of saturated ferric chloride solution to 100ml of boiling water and continue to boil until the solution turns reddish brown, cool down, and add 0.2g of tetraethyl orthosilicate. The above-mentioned core-shell particle product was slowly added dropwise, and continued to boil for 3 hours. After the reaction was completed, it was washed and centrifuged. The sandwich structure composite particles of resin-polymer-magn...

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Abstract

The invention discloses a method for preparing a magnetic particle with a level hole structure, and belongs to the field of nanometer material synthesis. According to the method, resorcinol and formaldehyde are mixed and stirred to form a carbon source precursor solution; a polymeric particle of a hollow structure is added into the carbon source precursor solution to obtain a phenolic resin-polymer core-shell structure; the phenolic resin-polymer core-shell structure is dispersed into water and is immersed through concentrated sulfuric acid to obtain a particle of the core-shell structure; a saturated ferric chloride solution is added to the boiling water to be boiled, and then is cooled, and ethyl orthosilicate is added to the cooled solution; the particle of the core-shell structure is slowly dripped to the saturated ethyl orthosilicate and ferric chloride solution, and after reaction, a sandwich composite particle made of resin-polymer-magnetic materials is obtained; tetrahydrofuran is used for removing polymer in the obtained composite particle to obtain a resin, magnetic material yolk and eggshell particle; the obtained composite particle is carbonized at the high temperature to obtain a carbon, magnetic material yolk and eggshell particle. According to the method, the adopted raw materials are common chemical materials, cost is low, and the technology is simple.

Description

technical field [0001] The invention belongs to the field of nanomaterial synthesis, and in particular relates to a magnetic microsphere with hierarchical porous structure and a preparation method thereof. Background technique [0002] Egg yolk-eggshell nanoparticle has a special structural morphology, which is different from the core-shell micro-nanoparticle. The core in the egg yolk-eggshell nanoparticle can move, and this special structure has special properties. Recently, egg yolk-eggshell nanoparticles have aroused widespread interest. Nanoparticles with this structure have new applications in the fields of catalysis, electrodes, and biopharmaceuticals, especially in drug carriers. Generally, magnetic egg yolk-eggshell particles are composed of mesoporous porous spherical shells (such as silica or carbon hollow spherical shells) and magnetic cores (such as ferroferric oxide) ([1] Yong G, LiuSM.One- potsynthesisofyolk–shellmesoporouscarbonsphereswithhighmagnetisation[J]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/42H01F41/00B82Y30/00B82Y40/00
Inventor 黄妙逢巨新张娜严婷婷于莹
Owner UNIV OF SCI & TECH BEIJING
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