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Method for preparing magnetic Nano material

A magnetic nanometer and magnetic nanoparticle technology, applied in the direction of iron oxide/iron hydroxide, etc., can solve the problems of limited application and poor water solubility.

Inactive Publication Date: 2007-12-26
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] While chemically modifying ferrite nanoparticles by silica to improve their chemical inertness, they also have poor water solubility, which largely limits the application of ferrite nanoparticles in analytical chemistry, nanomaterials, and synthesis. Applications in chemistry, bioanalytical chemistry, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Mix ferrous salt and ferric salt into a mixed solution, the steps are as follows: 1) Weigh a certain amount of 0.425g (1.65mmol) FeCl 3 .6H 2 O and 0.15 g FeCl 2 .4H 2 O (0.75mmol); 2) in N 2 Dissolve the above-mentioned weighed mixed iron salts into 200ml of deionized water under the protection of protection, and stir vigorously to ensure that the mixed iron salts are fully dissolved; 3) Put it in a cool place and set aside.

[0016] 2. Prepare 200ml of 1.5mol / l NH 4 OH in water and 200 ml of 0.15 mmol / l polyethylene glycol in ethanol.

[0017] 3. Under vigorous stirring and N 2 Under protection, the iron salt solution and polyethylene glycol ethanol solution were slowly added dropwise to the NH 4 OH aqueous solution, wait for the reaction to be sufficient, separate the precipitate with a magnet, wash it with deionized water three times, and finally separate it with a centrifuge at high speed and dry it in a vacuum to obtain the target product.

Embodiment 2

[0019] 1. Mix ferrous salt and ferric salt into a mixed solution, the steps are as follows: 1) Weigh a certain amount of 0.85g (3.3mmol) FeCl 3 .6H 2 O and 0.30 g FeCl 2 .4H 2 O (1.5mmol); 2) in N 2 Dissolve the above-mentioned weighed mixed iron salts into 200ml of deionized water under the protection of protection, and stir vigorously to ensure that the mixed iron salts are fully dissolved; 3) Put it in a cool place and set aside.

[0020] 2. Prepare 200ml of 0.75mol / l NH 4 OH in water and 200 ml of 0.75 mmol / l polyethylene glycol in ethanol.

[0021] 3. Under vigorous stirring and N 2 Under protection, the iron salt solution and polyethylene glycol ethanol solution were slowly added dropwise to the NH 4 OH aqueous solution, wait for the reaction to be sufficient, separate the precipitate with a magnet, wash it with deionized water three times, and finally separate it with a centrifuge at high speed and dry it in a vacuum to obtain the target product.

Embodiment 3

[0023] 1. Mix ferrous salt and ferric salt into a mixed solution, the steps are as follows: 1) Weigh a certain amount of 0.425g (1.65mmol) FeCl 3 .6H 2 O and 0.15 g FeCl 2 .4H 2 O (0.75mmol); 2) in N 2 Dissolve the above-mentioned weighed mixed iron salts into 200ml of deionized water under the protection of protection, and stir vigorously to ensure that the mixed iron salts are fully dissolved; 3) Put it in a cool place and set aside.

[0024] 2. Prepare 100ml of 1.5mol / l NH 4 OH in water and 100 ml of 0.15 mmol / l polyethylene glycol in ethanol.

[0025] 3. Under vigorous stirring and N 2 Under protection, the iron salt solution and polyethylene glycol ethanol solution were slowly added dropwise to the NH 4 OH aqueous solution, wait for the reaction to be sufficient, separate the precipitate with a magnet, wash it with deionized water three times, and finally separate it with a centrifuge at high speed and dry it in a vacuum to obtain the target product.

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PUM

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Abstract

This invention discloses a method for preparing a magnetic nanomaterial, more specifically, a method for preparing ferrite nanoparticles by chemical modification. The method comprises: (1) mixing aqueous solution of FeCl3 and FeCl2, ethanol solution of poly(ethylene glycol) and aqueous solution of NH4OH, and reacting at normal pressure under vigorous stirring and N2 protection; (2) separating the precipitate after the reaction, washing with water, and vacuum-drying to obtain ferrite nanoparticles with diameters of 5-10 nm. The ferrite nanoparticles have such advantages as high biocompatibility and high chemical stability, and can be widely used in biological field, such as biological separation, drug delivery, biological labeling, and magnetic resonance imaging, magnetic recording of biochip, and magnetic sealing and recording of auxiliary friction components.

Description

technical field [0001] The invention relates to a preparation method of magnetic nanometer material. Specifically, the present invention is a method for preparing ferrite nanoparticles through chemical modification. Background technique [0002] Nanomaterials, known as important materials in the 21st century, have attracted more and more attention from scientists because of their unique properties endowed by their size effects and quantum surface effects. Ferrite nanoparticles have been widely used in magnetic sealing, aerospace lubrication, microprinting, magnetic recording, and drug release in organisms. The application of magnetic nanomaterials in biology began in the early 1990s, especially recently, the application in this area has attracted the attention of scientific researchers, such as magnetic resonance imaging, bioseparation, drug delivery and treatment, and so on. At the same time, we must clearly realize that due to the strong magnetic dipole interaction betwe...

Claims

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Application Information

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IPC IPC(8): C01G49/02
Inventor 刘维民郭志光
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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