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A preparation method of ferromagnetic nanoparticles grafted on the surface of polyglycidol

A technology of polyglycidol and surface grafting, which is applied in the preparation of microspheres, microcapsule preparations, magnetic properties of inorganic materials, etc., can solve the problems of expensive raw materials and solvents, uneven particle size distribution, high cost and unsuitable for large-scale preparation, etc. problem, to achieve the effect of simple post-processing, low cost and strong magnetic responsiveness

Inactive Publication Date: 2014-10-01
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Li Zhen and others in N 2 Under the protection of the atmosphere, by selecting a strong polar solvent with a high boiling point, 2-pyrrolidone, to thermally decompose Fe(acac) at high temperature 3 , successfully prepared monodisperse water-soluble ferromagnetic nanoparticles with a particle size of 5nm and 11nm. This method is simple and easy to implement, but the particle size distribution is not uniform. Prepared on a large scale

Method used

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  • A preparation method of ferromagnetic nanoparticles grafted on the surface of polyglycidol
  • A preparation method of ferromagnetic nanoparticles grafted on the surface of polyglycidol

Examples

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Effect test

Embodiment 1

[0030] A method for preparing ferromagnetic nanoparticles (HPG-grafted MNPs) grafted on the surface of polyglycidol, the steps are as follows:

[0031] Add 2.33g of ferric oxalate pentahydrate into the three-necked flask, then add 4.66g of triethylene glycol (1:2) and mix evenly, react at 200°C for 1h, and react at 280°C for 1h, after naturally cooling to 25°C, add Glycidol monomers with a total volume percentage of 1:1 were mixed evenly and reacted at 50°C for 1 h. The final solution was precipitated with acetone to obtain HPG-grafted MNPs.

[0032] Such as figure 1 -(d) shows the transmission electron micrograph of ferromagnetic nanoparticles, and the figure shows that the particle size is 24nm. Such as figure 2 -Curve (d) shows the saturation magnetic flux of ferromagnetic nanoparticles, which shows that the saturation magnetic flux is 64.8wb.

Embodiment 2

[0034] A preparation method of ferromagnetic nanoparticles grafted on the surface of polyglycidol, the steps are as follows:

[0035] Add 2.33g of ferric oxalate pentahydrate into the three-necked bottle, then add 58.25g of triethylene glycol (1:25) and mix well, react at 200°C for 5h, and react at 290°C for 5h, cool naturally to 50°C, add The total volume percentage of glycidyl monomer is 1:50. After mixing evenly, react at 100°C for 12 hours, and finally obtain HPG-grafted MNPs after precipitation with acetone.

[0036] Such as figure 1 - (c) shows the transmission electron micrograph of ferromagnetic nanoparticles, and the figure shows that the particle size is 15nm. Such as figure 2 -Curve (c) shows the saturation magnetic flux of ferromagnetic nanoparticles, which shows that the saturation magnetic flux is 48.3wb.

Embodiment 3

[0038] A preparation method of ferromagnetic nanoparticles grafted on the surface of polyglycidol, the steps are as follows:

[0039] Add 2.33g of ferric oxalate pentahydrate into the three-necked bottle, then add 116.5g of triethylene glycol (1:50) and mix evenly, react at 200°C for 5h, and react at 290°C for 5h, cool naturally to 50°C, add The total volume percentage of glycidyl monomer is 1:50. After mixing evenly, react at 100°C for 12 hours, and finally obtain HPG-grafted MNPs after precipitation with acetone.

[0040] Such as figure 1 -(b) shows the transmission electron micrograph of ferromagnetic nanoparticles, and the figure shows that the particle size is 10nm. Such as figure 2 -Curve (b) shows the saturation magnetic flux of ferromagnetic nanoparticles, which shows that the saturation magnetic flux is 39.9wb.

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Abstract

The invention relates to a preparation method of ferromagnetic nanoparticles grafted on surface of polyglycerol. Ferric oxalate pentahydrate is taken as a precursor compound, triethylene glycol is taken as a solvent, glycidol is taken as a surface modifier, the synthesis is performed through a one-pot process, and the method comprises the following steps: mixing an iron salt oxalate and the strongly polar high-boiling point solvent with a hydroxyl group, firstly reacting at the temperature of 200 DEG C for 1-10 hours, then reacting at the temperature of 280-350 DEG C for 1-10 hours, and naturally cooling to 25 DEG C-120 DEG C after the completion of the reaction; and then adding glycidol monomers, uniformly mixing, reacting at the temperature of 50-200 DEG C for 1-24 hours, then adding the polar organic solvent, precipitating, and separating obtained solids to get the ferromagnetic nanoparticles grafted on the surface of the polyglycerol. The preparation method disclosed by the invention has the advantages that compared with the two-step preparation of the ferromagnetic nanoparticles, the one-pot process preparation process is simple and easy to realize the large-scale industrial production; and the particle size of the ferromagnetic nanoparticles prepared by the method is 10-20nm, and the particle size distribution is uniform.

Description

technical field [0001] The invention relates to the preparation of ferromagnetic nanoparticles, in particular to a method for preparing ferromagnetic nanoparticles grafted on the surface of polyglycidol. Background technique [0002] Among numerous nanomaterials, nanoparticles have attracted much attention due to their excellent properties and wide application potential. Ferric oxide (Fe 3 o 4 ) is an important spinel ferrite and one of the most widely used soft magnetic materials, nano-Fe 3 o 4 It has the characteristics of small particle size, large specific surface area, and magnetic sensitivity. It is often used as recording materials, pigments, magnetic fluid materials, catalysts, magnetic polymer microspheres, and electronic materials. It also has bright prospects in the fields of biotechnology and medicine. For example, it can be used as a magnetically targeted drug carrier for cancer treatment, nuclear magnetic resonance imaging, and the detection and separation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02H01F1/34
Inventor 王亮苏丹蒋莱
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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