Superparamagnetic nanoparticle and method of producing the same

A nanoparticle and superparamagnetic technology, which is applied in the field of superparamagnetic nanoparticles and its preparation, can solve rare problems and achieve the effect of narrow particle size distribution and uniform particle distribution

Inactive Publication Date: 2009-07-29
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current research mainly focuses on Fe 3 o 4 On the preparation of MnFe 2 o 4 preparation is less common

Method used

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  • Superparamagnetic nanoparticle and method of producing the same
  • Superparamagnetic nanoparticle and method of producing the same
  • Superparamagnetic nanoparticle and method of producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1), respectively weigh 0.19g (1.0mmol) MnCl 2 4H 2 O and 0.54g (2.0mmol) FeCl 3 ·6H 2 O, it is dissolved in the deionized water of 50g, vigorously stirs, to guarantee that manganese salt and iron salt fully dissolve, obtain mixed metal salt solution.

[0029] (2), prepare the aqueous solution of 1mol / L NaOH stand-by.

[0030] (3) Transfer the above metal salt solution to a 250ml three-neck flask for heating in a water bath at a temperature of 80°C, and add 10ml of the prepared NaOH solution under vigorous stirring.

[0031] (4) After reacting for 5 minutes, add 6 mmol of oleic acid, continue the constant temperature reaction for 1.0 h, and keep stirring during the process. After the reaction was completed, the three-necked bottle was taken out and ethanol was added immediately to obtain the product.

[0032] (5), the product is centrifuged to separate the precipitate, fully washed to neutrality, so that it is fully dispersed in n-hexane; after the undispersed part...

Embodiment 2

[0037] (1), respectively weigh 0.38g (2.0mmol) MnCl 2 4H 2 O and 1.08g (4.0mmol) FeCl 3 ·6H 2 O, it is dissolved in the deionized water of 50g, vigorously stirs, to guarantee that manganese salt and iron salt fully dissolve, obtain mixed metal salt solution.

[0038] (2), with embodiment 1.

[0039] (3) Transfer the above metal salt solution to a 250ml three-neck flask for heating in a water bath at a temperature of 85°C, and add 20ml of the prepared NaOH solution under vigorous stirring.

[0040] (4) After reacting for 5 minutes, add 10 mmol of oleic acid, continue the constant temperature reaction for 1.0 h, and keep stirring during the process. After the reaction was completed, the three-necked bottle was taken out and ethanol was added immediately to obtain the product.

[0041] (5), with embodiment 1.

Embodiment 3

[0043] (1), respectively weigh 0.57g (3.0mmol) MnC l 2·4H 2 O and 1.62g (6.0mmol) FeCl 3 ·6H 2 O, it is dissolved in the deionized water of 50g, vigorously stirs, to guarantee that manganese salt and iron salt fully dissolve, obtain mixed metal salt solution.

[0044] (2), with embodiment 1.

[0045] (3) Transfer the above metal salt solution to a 250ml three-neck flask for heating in a water bath at a temperature of 85°C, and add 25ml of the prepared NaOH solution under vigorous stirring.

[0046] (4) After reacting for 30 minutes, add 15 mmol of oleic acid, continue the constant temperature reaction for 1.5 hours, and keep stirring during the process. After the reaction was completed, the three-necked bottle was taken out and ethanol was added immediately to obtain the product.

[0047] (5), with embodiment 1.

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Abstract

The invention provides a superparamagnetic nano-particle and a preparation method thereof, which relates to a magnetic nano-material. The invention provides a superparamagnetic nano-particle with small particle size, narrow particle size distribution, good chemical stability and excellent magnetic properties, and a preparation method thereof. The superparamagnetic nano-particle is a MnFe2O4 nano-particle. The preparation method comprises the steps of dissolving MnCl2.4H2O and FeCl3.6H2O particles in water, obtaining a mixed metal salt solution, bathing, heating and stirring the metal salt solution, adding NaOH aqueous solution to the metal salt solution for reaction, adding oleic acid, continuing reaction, taking out a reaction vessel, adding ethanol to the reaction vessel and obtaining a product. The superparamagnetic nano-particle can be widely applied in the biological field, such as bioseparation, targeted drug release, magnetic resonance imaging, biochip magnetic recording, and the like.

Description

technical field [0001] The invention relates to a magnetic nano material, in particular to a superparamagnetic nano particle and a preparation method thereof. Background technique [0002] As an important nanomaterial, magnetic nanomaterials not only have the mesoscopic properties of nanomaterials (that is, between macroscopic and microscopic molecules and atoms) in terms of physics and chemistry, but also have their special magnetic capabilities-mesoscopic Magnetism, manifested as quantum size effect, superparamagnetism, macroscopic quantum tunneling effect, small size effect of magnetically ordered particles, specific apparent magnetism, etc., make it widely used in information technology, biomedicine and other fields, such as magnetic Fluids, high-density information storage, immobilized enzymes, targeted drugs, controlled release, nuclear magnetic resonance, DNA and cell separation techniques, etc. (1.Babes.L, Denizot, B, Tanguy.G, Jacques.J, Jeune.L, Jallet. P, J. Coll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/36C04B35/622
Inventor 王周成梁汉锋钟和平
Owner XIAMEN UNIV
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