Boron carbide coated carbon nanotube and preparation method and application thereof

A carbon nanotube and carbon-coated technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of difficult composite materials, difficult dispersion of carbon nanotubes, poor interface bonding ability, etc., to improve mechanical properties. And toughness, improve blindness, the effect of controllable expansion coefficient

Active Publication Date: 2019-10-25
SUZHOU FIRST ELEMENT NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the dispersion of carbon nanotubes is difficult, and the interface bonding ability with aluminum alloy is poor, so it is difficult to fully utilize the advantages of composite materials

Method used

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  • Boron carbide coated carbon nanotube and preparation method and application thereof
  • Boron carbide coated carbon nanotube and preparation method and application thereof

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preparation example Construction

[0028] The embodiment of the present invention relates to a method for preparing boron carbide-coated carbon nanotubes, comprising the following steps:

[0029] S1, put boric acid in a beaker, add trihydroxypropane to it according to the molar ratio of boric acid and trihydroxypropane (1.7-2.4): 1, then mix and stir evenly, heat in a water bath and perform ultrasonic treatment to completely dissolve boric acid in Trihydroxypropane, to obtain a transparent solution A;

[0030] S2, placing the carbon nanotubes in another beaker, adding an ethanol solution dropwise therein, and then ultrasonically treating them after complete soaking to obtain a carbon nanotube slurry B;

[0031] S3, adding the carbon nanotube slurry B prepared in step S2 into the transparent solution A prepared in step S1, mixing evenly and ultrasonically treating, then heating and evaporating ethanol in a water bath while stirring, to obtain carbon nanotubes, boric acid and trihydroxypropane Evenly mixed paste...

Embodiment 1

[0038] This embodiment relates to a method for preparing boron carbide-coated carbon nanotubes, comprising the following steps:

[0039] S1, put 30g of boric acid in a beaker, add 20mL of trihydroxypropane into it, stir evenly with a glass rod, heat it in a water bath to 75°C, and perform ultrasonic treatment on it, the working frequency is 20kHz, the ultrasonic power is 1000W, and the ultrasonic time is 10min. Solution A;

[0040] S2, put 22g of carbon nanotubes in another beaker, and drop ethanol solution into it; after the carbon nanotubes are completely infiltrated, perform ultrasonic treatment, the working frequency is 20kHz, the ultrasonic power is 800W, and the single ultrasonic time is 1min. Ultrasonic again for 2 minutes, a total of 5 times, to obtain carbon nanotube slurry B;

[0041] S3, add the carbon nanotube slurry B into the solution A, continue ultrasonication for 1min, the working frequency is 20kHz, and the ultrasonic power is 1000W, and then at 85°C at a ra...

Embodiment 2

[0046]S1, put 40g of boric acid in a beaker, add 25mL of trihydroxypropane into it, stir evenly with a glass rod, heat it in a water bath to 85°C, and perform ultrasonic treatment on it. The working frequency is 20kHz, the ultrasonic power is 1400W, and the ultrasonic time is about 5min. Transparent solution A;

[0047] S2, put 22g of carbon nanotubes in another beaker, and drop ethanol solution into it; after the carbon nanotubes are completely infiltrated, perform ultrasonic treatment on them, the working frequency is 20kHz, the ultrasonic power is 800W, and the single ultrasonic time is 2min, the interval Ultrasonic again for 2 minutes, a total of 10 times, to obtain carbon nanotube slurry B;

[0048] S3, add the carbon nanotube slurry B into the solution A, continue ultrasonication for 2min, the working frequency is 20kHz, the ultrasonic power is 1000W, and then at 75°C at a rate of 400r / min, the water bath is heated to evaporate ethanol to obtain carbon nanotubes, Paste ...

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Abstract

The invention relates to a boron carbide coated carbon nanotube and a preparation method and application thereof, and belongs to the technical field of functional materials. The preparation method ofthe boron carbide coated carbon nanotube includes the following steps that S1, a solution A of boric acid and trihydroxypropane is prepared; S2, carbon nanotube slurry B is prepared; S3, the carbon nanotube slurry B is added into the solution A, stirring and heating in a water bath are carried out after ultrasonic treatment, and uniformly mixed paste C of carbon nanotube, boric acid and trihydroxypropane is obtained; S4, the paste C is placed an inert gas atmosphere and heated to dehydrate the boric acid, trihydroxypropane is carbonized simultaneously, and the boron oxide/amorphous carbon coated carbon nanotube powder is obtained; and S5, the boron oxide/amorphous carbon coated carbon nanotube powder is loosely packed in a high-pressure reactor, vacuumzing is carried out, inert gas is introduced and then heating is carried out to 1400-1500 DEG C, heat is preserved for 1-5 hours, and then cooling is carried out naturally, that is, the carbon boron oxide coated carbon nanotube powder isobtained. According to the boron carbide coated carbon nanotube and the preparation method and application thereof, the interface binding ability of the carbon nanotube and aluminum alloy materials isimproved by synthesizing a boron carbide coating on the surface of a carbon nanotube.

Description

technical field [0001] The invention relates to a technology in the field of functional materials, in particular to a boron carbide-coated carbon nanotube, its preparation method and application. Background technique [0002] Aluminum matrix composites have the advantages of low density, corrosion resistance and good processability, which are very suitable for aerospace and automobile manufacturing industries. However, with the development of the above-mentioned industries, higher requirements have been put forward for the specific strength, specific stiffness, wear resistance, heat resistance and fatigue resistance of materials, and ordinary aluminum matrix composite materials have been difficult to meet the needs. [0003] Aluminum alloy doped with carbon nanotubes can improve the performance of aluminum matrix composites, and has been used in aerospace and automobile manufacturing industries. However, carbon nanotubes are difficult to disperse and have poor interfacial b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/168C01B32/991
CPCC01B32/168C01B32/991C01P2004/03C01P2006/00C01P2006/10
Inventor 王金娥董明
Owner SUZHOU FIRST ELEMENT NANO TECH
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