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Magnetic mesoporous silica microsphere material with yolk structure and preparing method thereof

A technology of mesoporous silica and egg yolk structure, applied in magnetic materials, microsphere preparation, silica, etc., can solve problems such as uneven morphology of composite materials, difficulty in controlling cavity size, and destruction of mesoporous channel structure, achieving The effects of rapid magnetic response, uniform morphology, and high pore volume

Active Publication Date: 2015-12-09
复微感知(合肥)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesized composite material has the disadvantages of poor magnetic response effect, uneven composite material shape, difficult to control the cavity size, poor dispersion of iron oxide exposed to air, and destroyed mesoporous channel structure.

Method used

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  • Magnetic mesoporous silica microsphere material with yolk structure and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Evenly disperse 0.1g of magnetic iron ferric oxide particles with a size of about 300nm in 40mL of ethanol and 20mL of deionized water, add 1mL of concentrated ammonia water (28wt%) to neutralize 0.2g of resorcinol, stir at room temperature for 5 minutes, and then Add 0.2 g of formaldehyde solution, stir at room temperature for 6 hours, and obtain magnetic composite microspheres coated with a layer of phenolic resin on the surface. The product is separated by a magnet and washed with a mixed solution of ethanol and water. After washing, the product is dried at room temperature before use.

[0024](2) Ultrasonically disperse 0.1g of magnetic Fe3O4 composite microspheres coated with a layer of phenolic resin in 80mL of dissolved 0.5g of cetyltrimethylammonium bromide (CTAB) and 0.8g of concentrated ammonia water. 20ml of n-hexane dissolved in 2ml of tetraethyl orthosilicate (TEOS) was added dropwise to the deionized water. Stir in a water bath at 30°C for 12 hours, se...

Embodiment 2

[0026] (1) 0.1g magnetic NiFe with a size of about 250nm 2 o 4 The particles are uniformly dispersed in 60mL ethanol and 40mL deionized water, add 0.8mL concentrated ammonia water (28wt%) and 0.2g 3-aminophenol, stir at room temperature for 5min, add 0.2g formaldehyde solution to it, and obtain a layer of polymer resin polymer coated on the surface. The magnetic composite microspheres are separated by a magnet and washed with a mixed solution of ethanol and water. After washing, the product is dried at room temperature and then used.

[0027] (2) 0.1g of magnetic NiFe coated with a layer of polymer resin polymer on the surface 2 o 4 The composite microspheres were ultrasonically dispersed in 60mL of deionized water dissolved in 0.4g of cetyltrimethylammonium chloride (CTAC) and 0.6ml of concentrated ammonia water, and 2ml of tetramethylorthosilicate (TMOS) was added dropwise 20ml of cyclohexane, mechanically stirred at 40 degrees for 12h, the product was separated with a ma...

Embodiment 3

[0029] (1) Evenly disperse 0.1g of magnetic γ-iron sesquioxide particles with a size of about 400nm in 10mL of ethanol and 80mL of deionized water, add 0.05gKOH, 0.3ml of formaldehyde, stir for 5min, add 0.3g of resorcinol, stir for 6h , to obtain magnetic composite microspheres coated with a layer of phenolic resin polymer on the surface, the product is separated by a magnet and washed with a mixed solution of ethanol and water, and the product is dried at room temperature after washing.

[0030] (2) Ultrasonic disperse the magnetic γ-ferric oxide composite microspheres coated with a layer of phenolic resin polymer in 60mL deionized water dissolved in 0.4gCTAB and 0.05gNaOH, and add dropwise 2ml of orthosilicon 30ml of n-hexane with ethyl acetate (TEOS), mechanically stirred at 45°C for 10h, the product was separated by a magnet and washed with a mixed solution of ethanol and water, after drying, in order to further remove the surfactant in the mesoporous channels Clean, and ...

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Abstract

The invention belongs to the technical field of advanced nanocomposites, and particularly discloses a magnetic mesoporous silica microsphere material with a yolk structure and a preparing method thereof. The macromolecule sol-gel chemical synthesis method is adopted first, magnetic nanoparticles are coated with a polymer resin macromolecule shell, then a mesoporous silica shell is grown on the surface of the polymer resin shell in a non-contact mode by means of the water-oil two-phase method, a surface active agent and an organic solvent are removed through solvent washing and extraction, and finally the magnetic mesoporous silica composite microsphere material provided with ordered mesopore ducts, a large cavity and the yolk structure is obtained. The obtained composite microsphere has the large adjustable cavity, a high specific surface area, the mesoporous shell with a uniform and vertical interface, stable and high magnetic responsiveness, a quite uniform size and high dispersity and has broad application prospects in nanoreactors, catalysis, drug sustained release, large-volume bioseparation and adsorption. The method is simple, raw materials are easy to obtain, and enlarged production is facilitated.

Description

technical field [0001] The invention belongs to the technical field of advanced nanocomposite materials, in particular to a class of magnetic mesoporous silica microsphere materials with egg yolk structure and a preparation method thereof. Background technique [0002] In recent years, egg yolk structure composite microspheres can provide a large storage volume due to their large internal cavity, and at the same time integrate the properties of the core and shell, and are used in drug delivery, controlled release, nanoreactors, catalysis, and large-capacity adsorption. and separations have many potential applications. Egg yolk-structured composite microspheres with magnetic iron oxide particles as the core, mesoporous silica material as the shell, and a large and tunable cavity in between have attracted extensive attention. The reason is that this composite microsphere has magnetic response characteristics, which can simplify and facilitate separation and analysis. The larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C01B33/12H01F1/00B01J20/26B01J20/30B01J20/28
Inventor 邓勇辉岳秦李佳骆张愉艾哈迈德·欧扎塔力阿卜杜拉兹·阿哈姆迪阿卜巴克·阿卜杜拉
Owner 复微感知(合肥)科技有限公司
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