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Preparation of carbon nanotube-organic solvent fluid dispersion

A carbon nanotube and organic solvent technology, which is applied in the field of dispersing carbon nanotubes, can solve the problems of destroying the surface structure of carbon nanotubes, large amount of solvent, etc., and achieves the effects of simple process, excellent dispersion effect and long time.

Inactive Publication Date: 2011-05-11
XIAMEN UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the SAA method has a good dispersion effect, it can only disperse carbon nanotubes in a water-based system.
In addition, there is also a method for surface wetting treatment of carbon nanotubes with a mixture of strong alkali and ethanol. Although it can be dissolved in organic solvents, the current research on this method is only for relatively expensive single-walled carbon nanotubes ( SWNT), and the amount of solvent required for processing is large, and this processing method will destroy the surface structure of carbon nanotubes

Method used

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  • Preparation of carbon nanotube-organic solvent fluid dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 0.1 g of multi-walled carbon nanotubes was added to 100 mL of N,N-dimethylformamide (DMF) solution of phthalylated chitosan (PhthCS) prepared at a concentration of 15%. The prepared suspension was placed in an ultrasonic reactor and subjected to ultrasonic treatment for 15 min; the ultrasonic-treated suspension was centrifuged at a centrifugation rate of 1500 r / min, and the supernatant was taken. It is the carbon nanotube-organic solvent dispersion. According to the settling time test, the carbon nanotube-organic solvent dispersion was still stable after being placed for 240 hours, and no settling occurred. The settling time test results of the carbon nanotube-organic solvent dispersion are shown in Table 1.

[0019] Table 1

[0020]

Embodiment 2

[0022] 0.2 g of concentrated sulfuric acid acidified surface-treated carbon nanotubes were added to a prepared 20% concentration of 100 mL of benzoylated chitosan (BCS) in N, N-dimethylacetamide (DMAC) solution. The prepared suspension was put into an ultrasonic reactor, and subjected to ultrasonic treatment for 10 min; the ultrasonic-treated suspension was centrifuged at a centrifugal rate of 2500 r / min, and the supernatant was taken. It is the carbon nanotube-organic solvent dispersion. The settling time test results of the carbon nanotube-organic solvent dispersion are shown in Table 1.

Embodiment 3

[0024] Add 1.2g of nitric acid mixed acid (nitric acid:sulfuric acid ratio 3:1) to acidify the surface-treated carbon nanotubes into 100mL of phthalylated chitosan (PhthCS) with a concentration of 20%. sulfone (DMSO) solution. The prepared suspension was placed in an ultrasonic reactor for ultrasonic treatment for 60 min; the ultrasonically treated suspension was centrifuged at a centrifugation rate of 5000 r / min, and the supernatant was taken. It is the carbon nanotube-organic solvent dispersion. The settling time test results of the carbon nanotube-organic solvent dispersion are shown in Table 1.

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Abstract

The invention provides a preparation method of dispersion liquid of carbon nano tube-organic solvent, relates to a method for carrying out dispersion of the carbon nano tube and provides a method for carrying out surface processing to the carbon nano tube by chitosan derivative so as to obtain the dispersion liquid of carbon nano tube-organic solvent which is not easy to agglomerate for long timeand is dispersed evenly. The method comprises the following steps: 0.1 to 12mg / mL of the carbon nano tube according to the mass volume ratio is added into chitosan derivative solution with the concentration of 1 percent to 20 percent (w / v) so as to obtain suspension; the suspension is processed by adopting ultrasonic wave; the processed suspension by the ultrasonic wave is processed centrifugally; and the supernatant liquid after being centrifugated is the dispersion liquid of carbon nano tube-organic solvent. The method has simple technique and simple operation, does not damage the self surface structure of the carbon nano tube and has excellent dispersion effect and long holding time of dispersion. The invention can obtain the dispersion liquid of the carbon nano tube with different dispersion effects by the processing of multiple chitosan derivative solution so as to be suitable for various requirements of different organic solvents.

Description

technical field [0001] The invention relates to a method for dispersing carbon nanotubes. Background technique [0002] In the current field of material research, polymer materials fill the performance gap that traditional inorganic and metal materials do not have. While replacing other materials in various fields and being used in practice, some shortcomings of polymers also limit its development, such as The strength is not high enough, the electromagnetic properties cannot meet the requirements of practical applications, etc., so it is imperative to enhance and modify polymer materials. As a new type of nanomaterial, carbon nanotubes have attracted widespread attention due to their unique structure and wide application prospects. Their high mechanical strength, small size, excellent electromagnetic properties, and similar molecular structure to polymers make them ideal polymer reinforcement materials. . However, carbon nanotubes are easily agglomerated into bundles and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08J3/215
Inventor 董炎明曾海涛周花
Owner XIAMEN UNIV
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