Method for uniformly cladding carbon nanotubes by nano ferroferric oxide magnetic particles

A technology of ferroferric oxide and magnetic particles, which is applied in the field of nanocomposite material preparation, can solve problems such as uncontrollable and non-uniform carbon nanotubes, and achieve the effects of controllable structure, improved electromagnetic absorption efficiency, and low cost

Active Publication Date: 2016-10-26
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the inhomogeneity and uncontrollable defects of the carbon nanotubes coated with ferroferric oxide prepared by the existing method, the purpose of the present invention is to provide...

Method used

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  • Method for uniformly cladding carbon nanotubes by nano ferroferric oxide magnetic particles
  • Method for uniformly cladding carbon nanotubes by nano ferroferric oxide magnetic particles

Examples

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Embodiment 1

[0035] 1) Put 20 mL of triethylene glycol in a dry and clean 100 mL beaker, add 1 g of multi-walled carbon nanotubes (with an inner diameter of 30-50 nm and a length of 10-20 μm), and stir to obtain a carbon nanotube dispersion solution;

[0036] 2) Take 0.1 g of iron acetylacetonate, add it to the above-mentioned dispersion solution, and perform cell crushing and ultrasonication for 5 minutes to obtain a mixed solution containing iron salt and carbon nanotubes;

[0037] 3) Sodium hydroxide is configured into a 6mol / L aqueous solution;

[0038] 4) Take another dry and clean 50mL beaker, add 10mL of triethylene glycol, add 1mL of the above-mentioned sodium hydroxide solution, and stir evenly to obtain an alkali-alcohol solution;

[0039] 5) Add the alkali-alcohol solution to the mixed solution containing iron salt and carbon nanotubes, and then perform cell crushing and ultrasonication for 5 minutes;

[0040] 6) Move the solution obtained in step 5) to a reaction kettle, put i...

Embodiment 2

[0046] 1) Put 20 mL of triethylene glycol in a dry and clean 100 mL beaker, add 1 g of multi-walled carbon nanotubes (with an inner diameter of 30-50 nm and a length of 10-20 μm), and stir to obtain a carbon nanotube dispersion solution;

[0047] 2) Take 0.5 g of ferrous acetylacetonate, add it to the above dispersion solution, and perform cell crushing and ultrasonication for 5 minutes to obtain a mixed solution containing iron salt and carbon nanotubes;

[0048] 3) Sodium hydroxide is configured into a 6mol / L aqueous solution;

[0049] 4) Take another dry and clean 50mL beaker, add 10mL of ethylene glycol, add 4mL of the above-mentioned sodium hydroxide solution, and stir evenly to obtain an alkali-alcohol solution;

[0050] 5) Add the alkali-alcohol solution to the mixed solution containing iron salt and carbon nanotubes, and then perform cell crushing and ultrasonication for 5 minutes;

[0051] 6) Move the solution obtained in step 5) to a reaction kettle, put it in an ov...

Embodiment 3

[0055] 1) Put 20 mL of diethylene glycol in a dry and clean 100 mL beaker, add 1 g of multi-walled carbon nanotubes (with an inner diameter of 30-50 nm and a length of 10-20 μm), and stir to obtain a carbon nanotube dispersion solution;

[0056] 2) Take 0.1 g of iron acetylacetonate, add it to the above-mentioned dispersion solution, and perform cell crushing and ultrasonication for 5 minutes to obtain a mixed solution containing iron salt and carbon nanotubes;

[0057] 3) Sodium hydroxide is configured into a 6mol / L aqueous solution;

[0058] 4) Take another dry and clean 50mL beaker, add 10mL of diethylene glycol, add 1-4mL of the above sodium hydroxide solution, and stir evenly to obtain an alkali-alcohol solution;

[0059] 5) Add the alkali-alcohol solution to the mixed solution containing iron salt and carbon nanotubes, and then perform cell crushing and ultrasonication for 5 minutes;

[0060] 6) Move the solution obtained in step 5) to a reaction kettle, put it in an ov...

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Abstract

The invention discloses a method for uniformly cladding carbon nanotubes by nano ferroferric oxide magnetic particles. The method takes carbon nanotubes, iron salt and alcohol as reaction raw materials and sodium hydroxide or ammonia water provides an alkaline environment; ferroferric oxide cladded carbon nanotubes are obtained by adopting a polyol method; and finally, ethanol and de-ionized water are added to repeatedly wash the ferroferric oxide cladded carbon nanotubes. Frroferric oxide cladded on the surfaces of the carbon nanotubes, which is obtained by the method, is very uniform; the process is simple and the cost is low; and industrialized production is easy to realize. The carbon nanotubes cladded by the ferroferric oxide have conductivity and magnetic properties; and compared with pure carbon nanotubes, the electromagnetic absorption rate is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocomposite materials, and in particular relates to a method for uniformly coating carbon nanotubes with nano ferroferric oxide magnetic particles. Background technique [0002] Carbon nanotubes have become a research hotspot due to their excellent mechanical, electrical, thermal, and high specific surface area properties. The modification of carbon nanotubes has also been extensively studied by more and more scholars. Because the modified carbon nanotubes can not only overcome some of their own defects, such as not easy to disperse, but also give them new properties, such as magnetic, electrical, optical and other properties. A lot of work introduces metal / metal oxide / polymer into carbon nanotubes to improve absorption efficiency and shielding effect. Due to low toxicity, low cost, and good compatibility, magnetic nanoparticles such as ferroferric oxide are also used to coat the surfac...

Claims

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Application Information

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IPC IPC(8): C09K3/00H05K9/00C01G49/08C01B31/02B82Y30/00
CPCB82Y30/00C01G49/08C01P2002/72C01P2004/03C01P2004/13C01P2004/80C01P2006/42C09K3/00H05K9/0081
Inventor 李娜付绍云肖红梅
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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