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Method for nondestructive dispersion of double-walled carbon nanotube by combination of N, N-dimethylformamide and ethylene glycol

A technology of dimethylformamide and double-walled carbon nanotubes, applied in the field of nanomaterials, can solve the problem of high production cost, and achieve the effects of low cost, simple equipment and easy handling

Active Publication Date: 2013-04-03
北京旭江科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to method limitations, the highest concentration of the resulting solution is only 0.15 mg mL-1, resulting in high production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Put the analytically pure ethylene glycol and N,N-dimethylformamide liquid with a volume ratio of 99:1 into a 50 mL beaker and put it into an ultrasonic cleaner for ultrasonic dispersion for 5 min. The power of the ultrasonic cleaner is 600 W. Circulating water is introduced into the ultrasonic cleaning machine to ensure that the water temperature in the cleaning machine remains at 25°C. will calculate the concentration to be 0.15 mg mL -1 The double-walled carbon nanotubes are placed in a uniformly dispersed mixed solution of ethylene glycol and N, N-dimethylformamide, and the double-walled carbon nanotubes have a diameter of 2-10 nm and a length of 5-20 um 1. The diameter of the tube bundle is 50-200 nm, and the Raman spectrum ratio of the complete peak to the defect peak of the double-walled carbon nanotube is 5. Put the mixture of double-walled carbon nanotubes, ethylene glycol, and N, N-dimethylformamide configured above into the power of an ultrasonic cleaner for...

Embodiment 2

[0016] Put the analytically pure ethylene glycol and N,N-dimethylformamide liquid with a volume ratio of 98:2 into a 100 mL beaker and put it into an ultrasonic cleaner for ultrasonic dispersion for 15 min. The power of the ultrasonic cleaner is 600 W. Circulating water is introduced into the ultrasonic cleaning machine to ensure that the water temperature in the cleaning machine remains at 25°C. will calculate the concentration to be 0.25 mg mL -1 The double-walled carbon nanotubes are placed in a uniformly dispersed mixed solution of ethylene glycol and N, N-dimethylformamide, and the double-walled carbon nanotubes have a diameter of 2-10 nm and a length of 5-20 um 1. The diameter of the tube bundle is 50-200 nm, and the Raman spectrum ratio of the complete peak to the defect peak of the double-walled carbon nanotube is 5.3. Put the mixture of double-walled carbon nanotubes, ethylene glycol, and N, N-dimethylformamide configured above into the power of an ultrasonic cleaner...

Embodiment 3

[0018] Put the analytically pure ethylene glycol and N, N-dimethylformamide liquid with a volume ratio of 97:3 into a 200 mL beaker and put it into an ultrasonic cleaner for ultrasonic dispersion for 30 min. The power of the ultrasonic cleaner is 600 W. Circulating water is introduced into the ultrasonic cleaning machine to ensure that the water temperature in the cleaning machine remains at 25°C. will calculate the concentration to be 0.35 mg mL -1The double-walled carbon nanotubes are placed in a uniformly dispersed mixed solution of ethylene glycol and N, N-dimethylformamide, and the double-walled carbon nanotubes have a diameter of 2-10 nm and a length of 5-20 um 1. The diameter of the tube bundle is 50-200 nm, and the Raman spectrum ratio of the complete peak to the defect peak of the double-walled carbon nanotube is 6.3. Put the mixture of double-walled carbon nanotubes, ethylene glycol, and N, N-dimethylformamide configured above into the power of an ultrasonic cleaner...

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Abstract

Relating to the technical field of nano-materials, the invention provides a method for nondestructive dispersion of a double-walled carbon nanotube by combination of N, N-dimethylformamide and ethylene glycol. Before dispersion, the double-walled carbon nanotube has a diameter of 2-10nm and a tube bundle diameter of 50-200nm. And the Raman spectrum ratio between a complete peak and a defect peak of the double-walled carbon nanotube is 5-6.3. The method comprises the steps of: taking ethylene glycol as a dispersion matrix, adding a dispersion conditioning agent N, N-dimethylformamide (in a volume ratio of 1:99-10:90), subjecting the mixture to ultrasonic dispersion for 8-24h, thus obtaining a double-walled carbon nanotube solution with a concentration up to 1.0mg mL<-1>. In the solution, the double-walled carbon nanotube has a diameter of 2-10nm, a tube bundle diameter of 10-100nm, and a Raman spectrum ratio between its complete peak and defect peak is 4.8-6.1. The dispersed double-walled carbon nanotube does not suffer obvious destruction in terms of its graphitization degree, but its length is cut short and the tube bundle is opened, thus bringing convenience for its application in various fields.

Description

technical field [0001] The invention relates to a method for dispersing carbon nanotubes without damage in the technical field of nanomaterials, in particular to a method for dispersing double-walled carbon nanotubes without damage by combining N, N-dimethylformamide and ethylene glycol. Background technique [0002] As a new type of nanomaterial, carbon nanotubes have brought excellent mechanical properties, electrical properties, thermal properties and electromagnetic properties due to their unique geometric structure and electronic band structure since their discovery. These excellent properties make Carbon nanotubes have great potential application advantages. The carbon nanotubes prepared by the general method are macroscopically flocculent or powdery. The premise of their application is to disperse them in a solvent to form a uniform solution. For example, carbon nanotube solutions have broad application prospects in aerospace, precision machinery and functional textil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y40/00C01B32/174
CPCY02P20/133
Inventor 吴子平黎业生羊建高陈一胜黄先亮李贝尹艳红李明茂王智祥
Owner 北京旭江科技有限公司
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