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Method for removing dispersant on surface of carbon nanotube by vacuum evaporation

A technology for removing carbon nanotubes and surface dispersants, applied in the direction of carbon nanotubes, nanocarbons, etc., can solve the problems of polymer pollution, low efficiency, instability, etc., to achieve easy industrial production, simple steps, reliable and stable process Effect

Pending Publication Date: 2019-05-17
BEIJING HUA TAN YUAN XIN ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A cumbersome, inefficient method for cleaning with large volumes of organic solvents; polymers designed to be hydrolyzed are inherently unstable in atmospheric environments
[0004] Korean patent application KR101775782B1 discloses a method for removing molecules on the surface of carbon nanotubes, mainly dispersing carbon nanotubes in a high-pressure dispersion liquid, and then annealing to separate and obtain relatively high-purity carbon nanotubes. This method still belongs to the existing One of the traditional three methods of pickling, alkali cleaning and annealing in the technology has not innovated from the original method. After the annealing treatment, the removal rate is not high firstly, and secondly, a large amount of cleaning is still required, which leads to waste of solvent and hydrolysis Technical issues of polymers polluting the environment
[0005] In fact, the technical field of removing organic molecules on the surface of carbon nanotubes has been in a state of continuous technical improvement, but the technical improvement is difficult to achieve actual results, and the aforementioned technical problems have not been fundamentally resolved.

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  • Method for removing dispersant on surface of carbon nanotube by vacuum evaporation
  • Method for removing dispersant on surface of carbon nanotube by vacuum evaporation

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Embodiment approach

[0049] In the second embodiment provided by the present invention, the polymer dispersant on the surface of the carbon nanotubes can be removed by using the principle of cracking the polymer with an acidic solution and the principle of vacuum evaporation.

[0050] According to the third embodiment of the present invention, there is provided a method for removing the dispersant on the surface of carbon nanotubes by vacuum evaporation, which is used to remove the dispersion liquid containing the small molecule dispersant and the dispersant containing the polymer dispersant on the surface of the carbon nanotubes. Dispersions.

[0051] The following will refer to figure 1 , to describe in detail the specific implementation steps of the third embodiment.

[0052] For carbon nanotubes with a dispersion liquid containing a small molecule dispersant and a dispersion liquid containing a polymer dispersant attached to the surface, first, the dispersion liquid containing a small molecul...

Embodiment 1

[0060] Step 1: Suction filter or evaporate the dispersion liquid containing small molecule dispersant to obtain solid powder or solid film; Step 2: Put the solid powder or solid film obtained in step 1 into the vacuum heating equipment, set the temperature at 300 ℃, vacuum degree 10 -3 Pa, time 2h, after the temperature of the vacuum chamber drops to room temperature, take out the sample.

Embodiment 2

[0062] Step 1: Suction filter or evaporate the dispersion liquid containing small molecule dispersant to obtain solid powder or solid film; Step 2: Put the solid powder or solid film obtained in step 1 into the vacuum heating equipment, set the temperature at 200 ℃, vacuum degree 10 -2 Pa, time 0.5h, after the temperature of the vacuum chamber drops to room temperature, take out the sample.

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Abstract

The invention relates to a method for removing a dispersant on the surface of a carbon nanotube by vacuum evaporation. The method comprises the following steps: preparing solid powder or a solid filmfrom a dispersant containing dispersion liquid on the surface of the carbon nanotube; performing vacuum heating treatment on the obtained solid powder or solid film to obtain the carbon nanotube afterthe dispersant is removed. The method has the advantages that the dispersant is removed completely and industrial production can be realized.

Description

technical field [0001] The disclosure relates to the field of removing organic matter on the surface of carbon nanotubes, in particular to a method for removing a dispersant on the surface of carbon nanotubes by vacuum evaporation. Background technique [0002] Carbon nanotubes have high application value in various fields such as conductive films, sensors, and integrated circuits. In most applications, dispersants are adsorbed on the surface of carbon nanotubes, among which organic dispersants are the most important ones, and these molecules play a bad role in practical applications, so it is necessary to effectively remove molecules on the surface of carbon nanotubes . [0003] At present, there are two main ways to remove molecules on the surface of carbon nanotubes: one is to clean with a large number of different organic solvents; the other is to design a polymer that can be hydrolyzed and then clean. Washing with large volumes of organic solvents is a cumbersome, ine...

Claims

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Application Information

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IPC IPC(8): C01B32/17
Inventor 韩杰
Owner BEIJING HUA TAN YUAN XIN ELECTRONICS TECH CO LTD
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