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Method for dispersing carbon nano-tube

A carbon nanotube, dispersing technology, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of reduced inherent properties, unfavorable application, damage to the electronic structure of carbon nanotubes, etc., and achieves low usage and stability. Good, high yield effect

Inactive Publication Date: 2017-12-01
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the covalent modification method destroys the electronic structure of carbon nanotubes, it may lead to the reduction of its inherent performance, which is not conducive to its application in many fields.

Method used

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  • Method for dispersing carbon nano-tube
  • Method for dispersing carbon nano-tube
  • Method for dispersing carbon nano-tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Place 3mg of 2,3,6,7,10,11-hexahydroxytriphenylene and 1.5mg of single-walled carbon nanotubes (HiPco) in a 60ml ultrasonic container, then add 30mL of water, and seal the bottle with plastic wrap After the mouth, it was fixed in the ultrasonic water tank of the ultrasonic cleaning machine, and the ultrasonic treatment was performed for 2 days. During the ultrasonic process, the temperature of the water tank was controlled at 20 °C by using a circulating water device. After the sonication, the solution was black, which proved that a considerable number of carbon nanotubes were uniformly dispersed in the water. Carefully transfer the dispersion to a centrifuge tube and centrifuge at a centrifugal force of 25700g for 1 hour in order to remove bundles of carbon nanotubes that are not uniformly dispersed. The supernatant liquid is taken out, and a uniformly dispersed carbon nanotube dispersion liquid can be obtained.

[0037] figure 1 The single-walled carbon nanotube di...

Embodiment 2

[0040] Place 3.0mg of 2,3,6,7,10,11-hexahydroxytriphenylene and 1.5mg of single-walled carbon nanotubes (HiPco) in a 60ml ultrasonic container, then add 30mL of methanol, and seal with plastic wrap After the bottle mouth, fix it in the ultrasonic water tank of the ultrasonic cleaning machine, and sonicate for 3 days. During the ultrasonic process, the temperature of the water tank was controlled at 15 °C by using a circulating water device. After the sonication, the solution was black, which proved that a considerable number of carbon nanotubes were uniformly dispersed in the water. Carefully transfer the dispersion to a centrifuge tube and centrifuge at a centrifugal force of 1029g for 1 hour to remove undispersed carbon nanotube bundles. Take out the supernatant to obtain a uniformly dispersed black carbon nanotube dispersion. The concentration of the carbon nanotubes in the dispersion liquid can be calculated through the absorption spectrum, and the yield of the carbon na...

Embodiment 3

[0042] Place 3mg of 2,3,6,7,10,11-hexahydroxytriphenylene and 0.75mg of single-walled carbon nanotubes (HiPco) in a 60ml ultrasonic container, then add 30mL of water, and seal the bottle with plastic wrap After the mouth, it was fixed in the ultrasonic water tank of the ultrasonic cleaning machine, and the ultrasonic treatment was performed for 2 days. During the ultrasonic process, the temperature of the water tank was controlled at 15 °C by using a circulating water device. After the sonication, the solution was black, which proved that a considerable number of carbon nanotubes were uniformly dispersed in the water. Carefully transfer the dispersion to a centrifuge tube and centrifuge at a centrifugal force of 25,700 g for 1.5 hours to remove undispersed carbon nanotube bundles. Take out the supernatant to obtain a uniformly dispersed black carbon nanotube dispersion.

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Abstract

The invention discloses a method for dispersing a carbon nano-tube, which can be used for effectively peeling and dispersing a carbon nano-tube bundle by utilizing the noncovalent interaction between a conjugate macrocycle molecule (dispersing agent) and the carbon nano-tube and the hydrogen bond network structure formed among molecules of the dispersing agent. The method comprises the following steps: adding the dispersing agent and the carbon nano-tube into an ultrasonic container filled with a dispersing solvent, and performing ultrasonic treatment at room temperature to obtain a coarse sample of the carbon nano-tube dispersing solution; and centrifugally removing the carbon nano-tube bundle which is uniformly dispersed to obtain a dispersing solution which is uniformly dispersed. According to the method, the aim of efficiently dispersing the carbon nano-tube (yield is 75 percent) can be achieved under a low dispersing agent dosage (the concentration is reduced to 0.005mg / mL) by selecting an efficient dispersing agent.

Description

technical field [0001] The invention relates to the field of carbon nanotube dispersion, in particular to a method for efficiently preparing a carbon nanotube dispersion liquid. Background technique [0002] Carbon nanotubes are coaxial round tubes with nanoscale diameters composed of carbon atoms arranged in a hexagonal shape. According to the different tube walls, carbon nanotubes can be divided into single-walled carbon nanotubes and multi-walled carbon nanotubes. Due to the structural characteristics of large aspect ratio, specific surface area, and highly delocalized large π structure, carbon nanotubes show excellent performance in mechanics, electricity, optics, magnetism, etc. Devices, field emission devices, absorbing materials and other fields have broad application prospects. However, there is a strong van der Waals force between carbon nanotubes, which makes them easy to agglomerate into bundles or entangled into clusters, which seriously restricts their excelle...

Claims

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Application Information

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IPC IPC(8): C01B32/174
Inventor 刘刚刘能赵平刘治田戴武斌
Owner WUHAN INSTITUTE OF TECHNOLOGY
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