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Method for preparing magnetic iron oxide nano particles

A magnetic iron oxide, nanoparticle technology, applied in the fields of nanoscience, biological materials, and material chemistry, can solve the problems of poor crystallinity, uneven dispersion, affecting the application effect, etc., and achieve the effect of low pollution

Active Publication Date: 2011-08-17
江苏龙力泵阀制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

6-9nm iron oxide nanoparticles were obtained from a high-voltage electrostatic collector, but the X-ray diffraction results showed that their crystallinity was poor
The iron oxide nanoparticles prepared by this type of method are not directly chemically modified in the synthesis, and even if they are chemically modified later, there is uneven dispersion, which directly affects their application in biomedicine.

Method used

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  • Method for preparing magnetic iron oxide nano particles
  • Method for preparing magnetic iron oxide nano particles
  • Method for preparing magnetic iron oxide nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 0.08 g iron pentacarbonyl Fe(CO) 5 Dissolve it in 15ml of pure ethanol, pour the above solution into the atomization cup of the atomizer, and pass through the mixed gas of 600ml / min of argon and 3-4ml / min of oxygen. The two gases are mixed with a simple gas mixer. Ventilate for 10 minutes to remove the air in the system, and then start atomization, and the mixed gas of argon and oxygen loads the atomized liquid droplets into the heater. The temperature of the first heater (pre-heater) is 330°C, and the length of the constant temperature zone of the first heater is about 10cm; the temperature of the second heater (main heater) is 360°C, and the length of the constant temperature zone of the second heater is about 40cm; After iron pentacarbonyl is vaporized-decomposed-oxidized in the heater, the carrier gas is loaded into the collection solution, and the collection solution is composed of 20ml single-terminal carboxyl polyethylene glycol monomethyl ether (molecular weigh...

Embodiment 2

[0031] 0.85 g iron pentacarbonyl Fe(CO) 5 Dissolve it in 15ml of pure ethanol, pour the above solution into the atomization cup of the atomizer, and pass through the mixed gas of 300ml / min of argon and 3-4ml / min of oxygen. Operate in the same manner as in Example 1, the temperature of the first-stage heater is 230°C, and the temperature of the second-stage heater is 340°C. The vaporization-decomposition-oxidation product of iron pentacarbonyl is loaded into the collection liquid by the carrier gas, and the collection liquid is a mixed solution of 30ml single-terminal carboxyl polyethylene glycol (molecular weight: 1000), 30ml pure ethanol and 4ml oleylamine. The reaction and collection were carried out for 50 minutes. The product is brownish red. The treatment method is the same as in Example 1, that is, the product is added with pure ethanol, mixed evenly by ultrasonic waves, and the precipitate is dissolved in deionized water or pure ethanol after centrifugal cleaning. i...

Embodiment 3

[0033] 0.06 g iron pentacarbonyl Fe(CO) 5 Dissolve in 15ml of pure ethanol, then add 3 grams of triethylene glycol, pour the above solution into the atomization cup of the nebulizer, pass through the mixture of 600 ml / min of argon and 3-4 ml / min of oxygen gas. Operate in the same manner as in Example 1, the temperature of the first-stage heater is 330°C, and the temperature of the second-stage heater is 360°C. The vaporization-decomposition-oxidation product of iron pentacarbonyl is loaded into the collection liquid by the carrier gas, and the collection liquid is composed of 20ml single-terminal carboxyl polyethylene glycol monomethyl ether (molecular weight is 1200) dissolved in 50ml pure ethanol, and the collection The liquid container was cooled in an ice-water bath, and the collected liquid was stirred rapidly with a magnetic stirrer. The reaction and collection were carried out for 30 minutes. The product is brown-red translucent. In the same treatment as in Example ...

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Abstract

The invention discloses a method for preparing magnetic iron oxide nano particles. The method comprises the following steps of: dissolving iron pentacarbonyl and a modifier into a solvent, atomizing by virtue of an ultrasonic atomizer, loading a solution into a heater by virtue of a carrier gas, carrying out gasification, decomposition and oxidation, introducing products into collected fluid, mixing, stirring, and carry outing surface reaction to obtain modified magnetic iron oxide nano particles. The modifier used in atomized liquid and the collection fluid is selected from oleic acid or oleic amine, triethylene glycol, polyethylene glycol PEG and derivates thereof, glucosan, citric acid, tetramethylammonium hydroxide, carboxylic acid polyethylene glycol and derivates thereof, polyvinylpyrrolidone (PVP) and dimercapto succinic acid or a mixture of the substances; the carrier gas is a mixed gas of oxygen gas and argon gas, and the heating process is carried out in two stages. By applying the method disclosed by the invention, the magnetic iron oxide nano particles with uniform particle sizes can be prepared while the advantages of speediness, high efficiency, continuous production and low pollution are achieved; and the prepared iron oxide nano particles can be used in the fields such as biology, medicine, catalysis and mechanical lubrication.

Description

Technical field: [0001] The technical field of the invention is the field of material chemistry, nano science and biomaterials, and in particular relates to the synthesis of magnetic iron oxide nano crystal grains by vaporization-decomposition-oxidation of iron carbonyl compounds and its modification integrated preparation method. Background technique: [0002] Gamma iron oxide or iron ferric oxide nanoparticles have paramagnetism (larger particle size) or superparamagnetism (ultrafine nanoparticles with a particle size below 50 nanometers). The magnetic iron oxide nanoparticles stably dispersed in a solvent have applications of contrast agents, catalysts and lubricants. For example, magnetic iron oxide nanoparticles become nanoparticles with good biocompatibility through surface chemical modification, which can be further linked with special proteins or enzymes to have absorption specificity. Because of its low toxicity, it is used in biomedical research in vivo and in vit...

Claims

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Application Information

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IPC IPC(8): C01G49/08C01G49/06B82Y40/00
Inventor 张宝林王行展
Owner 江苏龙力泵阀制造有限公司
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