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A kind of preparation method of the surface polydopamine modified magnetic carbon nanotube

A technology of magnetic carbon nanotubes and polydopamine, which is applied in the field of nanomaterials, can solve the problems of difficult surface modification, reduced magnetism, and easy oxidation of nanomagnetic particles, and achieve the effect of rapid separation and enrichment and stable structure

Active Publication Date: 2016-06-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, nano-magnetic particles are easily oxidized to reduce their magnetic properties, and the surface is not easy to modify

Method used

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  • A kind of preparation method of the surface polydopamine modified magnetic carbon nanotube
  • A kind of preparation method of the surface polydopamine modified magnetic carbon nanotube
  • A kind of preparation method of the surface polydopamine modified magnetic carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (a) Weigh FeCl respectively 3 ·6H 2 O0.5g and 2.0g of anhydrous sodium acetate were dissolved in 7mL of ethylene glycol and 13mL of diethylene glycol and mixed evenly, placed in a high-pressure reactor, the reaction temperature was 190°C, the reaction time was 12h, and the reaction pressure was 1-6Mpa. After the reaction is finished, cool down to room temperature naturally. In the presence of an external magnetic field, separate the solid compound in the reaction kettle, wash with deionized water and absolute ethanol for 3-6 times, remove the residual organic solvent in the product, and dry it in vacuum. to obtain magnetic nanoparticles.

[0031] (b) Weigh 0.8g of magnetic nanoparticles and 0.2g of carbon nanotubes and dissolve them in 50mL of ethylene glycol, sonicate at 30°C for 3h, and then -1 Stir the mixture at a high speed for 30 min to obtain a homogeneous mixture.

[0032] (c) Transfer the mixed solution obtained in step (b) to a sealed stainless steel autocl...

Embodiment 2

[0035] (a) Weigh FeCl respectively 3 ·6H 2 O0.5g and 2.0g of anhydrous sodium acetate were dissolved in 10mL of ethylene glycol and 10mL of diethylene glycol and mixed evenly, placed in a high-pressure reactor, the reaction temperature was 210°C, the reaction time was 6h, and the reaction pressure was 1-6Mpa. After the reaction is finished, cool down to room temperature naturally. In the presence of an external magnetic field, separate the solid compound in the reaction kettle, wash with deionized water and absolute ethanol for 3-6 times, remove the residual organic solvent in the product, and dry it in vacuum. to obtain magnetic nanoparticles.

[0036] (b) Weigh 0.8g of magnetic nanoparticles and 0.2g of carbon nanotubes and dissolve them in 40mL of ethylene glycol, sonicate at 40°C for 2h, and then -1 Stir the mixture at a high speed for 60 min to obtain a homogeneous mixture.

[0037] (c) Transfer the solution obtained in step (b) to a sealed stainless steel autoclave li...

Embodiment 3

[0040] (a) Weigh FeCl respectively 3 ·6H 2O1.0g and 2.0g of anhydrous sodium acetate were dissolved in 10mL of ethylene glycol and 10mL of diethylene glycol, mixed evenly, placed in a high-pressure reactor, the reaction temperature was 200°C, the reaction time was 12h, and the reaction pressure was 1-6Mpa. After the reaction is finished, cool down to room temperature naturally. In the presence of an external magnetic field, separate the solid compound in the reaction kettle, wash with deionized water and absolute ethanol for 3-6 times, remove the residual organic solvent in the product, and dry it in vacuum. to obtain magnetic nanoparticles.

[0041] (b) Weigh 0.6g of magnetic nanoparticles and 0.2g of carbon nanotubes, dissolve them in 30mL of ethylene glycol, ultrasonicate at 40°C for 3h, and then dissolve them at 300rmin -1 Stir the mixture at a high speed for 60 min to obtain a homogeneous mixture.

[0042] (c) Transfer the solution obtained in step (b) to a sealed stai...

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Abstract

The invention discloses a preparation method of a surface polydopamine-modified magnetic carbon nanotube, which belongs to the field of nanomaterial preparation. The steps of the method include: synthesizing magnetic nanoparticles by solvothermal method; adding magnetic nanoparticles and carbon nanotubes to ethylene glycol in a certain proportion, stirring and ultrasonically obtaining a homogeneous solution, and subjecting the solution to solvothermal reaction to obtain magnetic carbon nanotubes; and then dissolving the obtained magnetic carbon nanotubes and dopamine in a Tris-HCl buffer solution at a certain ratio, and polymerizing for a certain period of time to obtain magnetic carbon nanotubes modified with polydopamine on the surface. The product prepared by the present invention not only has the super strong mechanical properties of carbon nanotubes, but also has the characteristics of nanometer size effect of magnetic particles, better biocompatibility and magnetic responsiveness, and also has the hydrophilicity of dopamine , structural stability and characteristics as a secondary reaction platform, it can be widely used in biological fields, such as protein separation, drug delivery, biomarkers, etc.

Description

【Technical field】 [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a method for preparing magnetic carbon nanotubes whose surface is modified by polydopamine. 【Background technique】 [0002] Since Lijima reported the discovery of carbon nanotubes in 1991, carbon nanotubes have been favored by many scientists for their unique topology, super mechanical properties, good heat transfer and electrical conductivity, and some chemical properties. Research hotspot in the field of nano functional materials. Carbon nanotubes have a large aspect ratio and are quasi-one-dimensional quantum wires. Therefore, it has extremely broad application prospects in the fields of nanometer equipment, microelectronics, and functional composite materials. Magnetic nanomaterials have the characteristics of nanometer size effect, good biocompatibility and magnetic responsiveness, and can be easily and rapidly separated under the action of an ext...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08K7/00C08K3/04C08K3/22
Inventor 高瑞霞张丽丽赵思奇唐玉海
Owner XI AN JIAOTONG UNIV
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