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A kind of physical dispersion method of carbon nanotubes

A carbon nanotube and dispersion technology, applied in the direction of carbon nanotubes, nanocarbon, chemical instruments and methods, etc., can solve the problems of difficult operation, long process flow, cumbersome preparation process, etc., and achieve structural integrity and wide application Foreground, the effect of shortening the preparation time

Active Publication Date: 2018-06-12
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the article "The effect of ball milling dispersion process on the dispersion of carbon nanotubes" (Huang Minfu et al. Materials Herald, 2013 (S2): pp. 35-38), the carbon nanotubes were dispersed by dry ball milling and wet ball milling, and the results It shows that under the impact of ball milling, carbon nanotube aggregates are opened to achieve the purpose of dispersing carbon nanotubes, but this mechanical dispersion method causes different degrees of damage to the structure of carbon nanotubes, and the higher the ball milling speed The larger the structure, the greater the damage
[0004] These methods have good shearing and dispersion effects on unentangled carbon nanotubes, but the dispersion effect on agglomerated carbon nanotube particle clusters is not obvious. Some methods, such as ball milling, will damage the structure of carbon nanotubes, thereby affecting the carbon nanotubes. Nanotubes exert their excellent mechanical properties; strong acid dispersion treatment not only cuts the length of carbon nanotubes during the dispersion process, but also the use of strong acids will inevitably cause secondary pollution and difficult operation; in addition, the preparation method in the above patent is cumbersome. The process is long and time-consuming

Method used

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  • A kind of physical dispersion method of carbon nanotubes
  • A kind of physical dispersion method of carbon nanotubes
  • A kind of physical dispersion method of carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) 1.5g polyvinyl alcohol (purity is 99.0wt%) is added into 300ml deionized water, after stirring, it is placed in a 90°C water bath for 90min, and cooled to room temperature to obtain a dispersant for dispersing carbon nanotubes. Vinyl alcohol (purity: 99.0wt%) was added to 50ml of deionized water, kept in a 90°C water bath for 180min, and cooled to room temperature to obtain a binder for fixing carbon nanotubes;

[0025] (2) Add 0.03g of multi-walled carbon nanotubes (purity: 99.0wt.%) particles to the dispersant in step (1), after stirring, place the above mixed solution in a water bath for 60 minutes of ultrasonication, and the temperature of the water bath is controlled at 20°C ;

[0026] (3) 30g pure aluminum powder (purity is 99.0wt.%, particle diameter is 5 μm) is joined in the carbon nanotube dispersion liquid that makes in the step (2), and magnetic force stirs 5min, obtains mixed slurry, removes after static Add the binder prepared in step (1) to the supern...

Embodiment 2

[0028] (1) 3g of polyvinyl alcohol (purity: 99.5wt%) was added to 300ml of deionized water, stirred and placed in a 90°C water bath for 90 minutes, cooled to room temperature to obtain a dispersant for dispersing carbon nanotubes, and 2g of polyethylene Alcohol (purity: 99.0wt%) was added to 50ml of deionized water, kept in a 90°C water bath for 180min, and cooled to room temperature to obtain a binder for fixing carbon nanotubes;

[0029] (2) Add 1.5 g of multi-walled carbon nanotube (purity: 99.5wt.%) particles to the dispersant in step (1), after stirring, place the above mixed solution in a water bath for 180 min, and control the temperature of the water bath at 35°C ;

[0030] (3) Add 30g of ceramic powder (purity is 99.5wt.%, particle size is 10 μm) to the carbon nanotube dispersion prepared in step (2), stir magnetically for 20min to obtain a mixed slurry, remove the upper layer after standing still Add the binder prepared in step (1) to the clear liquid, stir magnetic...

Embodiment 3

[0032] (1) 1.5g polyvinyl alcohol (purity is 99.0wt%) is added to 300ml deionized water, after stirring, it is placed in a 95°C water bath for 90min, and cooled to room temperature to obtain a dispersant for dispersing carbon nanotubes. Vinyl alcohol (purity: 99.0wt%) was added to 50ml of deionized water, kept in a 90°C water bath for 180min, and cooled to room temperature to obtain a binder for fixing carbon nanotubes;

[0033] (2) Add 0.3 g of multi-walled carbon nanotubes (purity: 99.5wt.%) particles to the dispersant in step (1), after stirring, place the above mixed solution in a water bath for 120 min, and control the temperature of the water bath at 40°C ;

[0034](3) 30g of pure magnesium powder (purity is 99.0wt.%, particle diameter is 35 μm) is joined in the carbon nanotube dispersion liquid that makes in the step (2), and magnetic force stirs for 15 minutes, obtains mixed slurry, after static Remove the supernatant, add the binder prepared in step (1), stir magneti...

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Abstract

A physical dispersion method of carbon nanotubes relates to the field of dispersion of carbon nanotubes. The method treats the surface of the carbon nanotubes through a series of technological processes to uniformly disperse them, and fix them on the surface of solid particles in the form of a single root under the action of a binder to avoid secondary agglomeration. The main implementation steps of the method are: (1) preparation of carbon nanotube dispersant and binder; (2) carbon nanotube dispersion treatment; (3) dispersion and fixation of carbon nanotubes. The method of the invention has the advantages of good dispersion effect, stable dispersion, easy operation, short process flow, short preparation cycle, little environmental pollution, etc., and has wide application prospects.

Description

technical field [0001] The invention relates to the field of dispersion of carbon nanotubes, in particular to a physical dispersion method of carbon nanotubes. Background technique [0002] Carbon Nanotube (CNT for short) is a one-dimensional quantum material with a special structure, which has the characteristics of high specific surface area, high specific surface energy and high reactivity. Since its discovery, it has shown good application prospects in many fields such as electrode materials, nanoelectronic materials, and structural materials with its unique mechanical, thermal, magnetic, and electrical properties. The Young's modulus and shear modulus of carbon nanotubes are comparable to those of diamond, and its axial Young's modulus is close to 2TPa, and its tensile strength is as high as 100GPa, which is 100 times that of steel and more than 20 times that of high-strength carbon fiber. The density is only 1.35g / cm 3 About 1 / 6 of steel, 1 / 2 of aluminum, and 3 / 4 of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F11/02C01B32/158
CPCB01F31/80
Inventor 杜文博侯江涛王朝辉刘珂李淑波杜宪
Owner BEIJING UNIV OF TECH
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