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One-step method for preparing surface-functionalized superpara-Fe3O4 magnetic nanoparticles

A technology of magnetic nanoparticles and surface functionalization, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problems of difficult removal of surfactants, cost, many steps, and complicated processes, etc., to achieve Increase stability, good dispersion, and avoid agglomeration

Inactive Publication Date: 2020-12-22
太古宙基因科技(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods often have the defects of many steps, complicated process, difficult removal of introduced surfactant and high cost.

Method used

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  • One-step method for preparing surface-functionalized superpara-Fe3O4 magnetic nanoparticles
  • One-step method for preparing surface-functionalized superpara-Fe3O4 magnetic nanoparticles
  • One-step method for preparing surface-functionalized superpara-Fe3O4 magnetic nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1 A kind of particle diameter 5nm, the Fe of tool propyl ammonium functionalized surface protection 3 o 4 Preparation of Magnetic Nanoparticles.

[0023] 1) Dissolve 0.2mol ferric chloride and 0.15mol ferrous chloride in 200ml DI H 2 O, placed in a 500ml three-neck flask and purged with nitrogen to remove the air for 20 minutes.

[0024] 2) Dissolve 0.9mol tetrapropylammonium hydroxide in 200ml DI H 2 O, nitrogen gas was passed for 20 minutes, and then added dropwise to a three-necked flask while nitrogen gas was passed and mechanical stirring was carried out. The reaction temperature was 20°C.

[0025] 3) Continue to stir for 4 hours after the dropwise addition, and wash the product three times with deionized water de-aired with nitrogen. Finally, the prepared magnetic particles are collected with a permanent magnet and stored in an aqueous solution to obtain Fe particles with a particle size of 5 nm and surface protection with propylammonium functionali...

Embodiment example 2

[0026] Example 2: Fe with a particle size of 10nm and surface protection with butyl ammonium 3 o 4 Preparation of Magnetic Nanoparticles.

[0027] 1) Dissolve 0.35mol ferric sulfate and 0.25mol ferrous sulfate in 150ml DI H 2 O, placed in a 500ml three-neck flask and passed through nitrogen to remove the air for 25 minutes.

[0028] 2) Dissolve 1.5mol tetrabutylammonium hydroxide in 150ml DI H 2 O, nitrogen gas was passed for 25 minutes, and then added dropwise to a three-necked flask while nitrogen gas was passed and mechanical stirring was carried out. The reaction temperature was 25°C.

[0029] 3) Continue to stir for 5.5 hours after the dropwise addition, and wash the product three times with deionized water de-aired with nitrogen. Finally, the prepared magnetic particles are collected with a permanent magnet and stored in an aqueous solution to obtain Fe with a particle size of 10 nm and surface protection with butylammonium. 3 o 4 magnetic nanoparticles.

Embodiment example 3

[0030] Example 3: Fe with a particle size of 10nm and surface protection with methylaniline functionalization 3 o 4 Preparation of Magnetic Nanoparticles.

[0031] 1) Dissolve 0.7mol ferric nitrate and 0.45mol ferrous nitrate in 200ml DI H 2 O, placed in a 500ml three-neck flask and purged with nitrogen to remove the air for 30 minutes.

[0032] 2) Dissolve 3.5mol trimethylphenylammonium hydroxide in 200ml DI H 2 O, nitrogen gas was passed for 30 minutes, and then added dropwise to a three-necked flask while nitrogen gas was passed and mechanical stirring was carried out. The reaction temperature was room temperature 22°C.

[0033] 3) Continue to stir for 6 hours after the dropwise addition, and wash the product three times with deionized water de-aired with nitrogen. Finally, the prepared magnetic particles are collected with a permanent magnet and stored in an aqueous solution to obtain Fe with a particle size of 10 nm and a surface protection with methylaniline function...

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Abstract

The invention provides a one-step method for preparing surface-functionalized superpara-Fe3O4 magnetic nanoparticles. Different from a current universal coprecipitation method, the method does not need heating and can realize room-temperature preparation. The prepared magnetic particles are uniform in particle size and good in dispersity. Meanwhile, a new alkali liquor formula, one-step coprecipitation preparation of the magnetic nanoparticles and the means of surface protection are introduced, and the magnetic particles are endowed with functional groups. The preparation method is simple in steps, low in cost and easy for industrial large-scale preparation.

Description

technical field [0001] The invention belongs to the field of preparation of magnetic nanoparticles, in particular to one-step method for preparing surface functionalized supercis Fe 3 o 4 Methods for Magnetic Nanoparticles. Background technique [0002] Fe 3 o 4 Due to the dual advantages of both magnetic particles and nanoparticles, magnetic nanoparticles have been widely used in biomedical fields such as targeted drug carriers, cell separation, nuclear magnetic resonance, immune analysis, and nucleic acid hybridization. At the same time, this superparamagnetic material also has good application prospects in the field of catalysis, and can be used as a catalytic carrier for small-sized liquid-phase catalysts to improve the difficult separation of catalysts. Currently, it is used to prepare Fe 3 o 4 There are many chemical methods for magnetic nanoparticles, such as co-precipitation method, hydrothermal / solvothermal method, microemulsion method, sol-gel method, metal-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/08C01P2004/01C01P2004/64C01P2006/40
Inventor 戴恒
Owner 太古宙基因科技(深圳)有限公司
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