Carbon nanotube surface coating method

A carbon nanotube and coating technology, which is applied in nanotechnology, nanotechnology, solid-state chemical plating and other directions, can solve the problems of high processing cost, low carbon nanotube agglomeration efficiency, complicated procedures, etc., and achieves a simple and easy-to-operate preparation method. Effect

Active Publication Date: 2020-11-10
SUZHOU FIRST ELEMENT NANO TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

On the one hand, it is because carbon nanotubes need to be dispersed to improve the uniformity of coating; carbon nanotubes can be dispersed by high-speed ball milling or low-speed ball milling, but both high-speed ball milling and low-speed ball milling are only It is suitable for the preparation of a small amount of samples in the laboratory. In large-scale production, the structure of carbon nanotubes is easily damaged by high-speed ball milling, and the problem of low agglomeration efficiency of open carbon nanotubes exists when low-speed ball milling is used.
On the other hand, because the traditional electroless plating process is complicated, the processing cost is high, the plating layer inevitably contains impurities such as palladium, and the quality is difficult to control

Method used

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Embodiment 1

[0023] In this embodiment, the coating of a silicon layer on the surface of carbon nanotubes is taken as an example for illustration, and the specific steps are as follows:

[0024] S 1 , respectively weighing whisker-shaped multi-walled carbon nanotubes and silicon iodide according to the molar ratio of carbon to silicon of 1:0.5-2.0, mixing evenly and compacting;

[0025] S 2 , connect the compacted carbon nanotubes and silicon iodide mixture with a pair of graphite electrodes, then evacuate and argon in turn, repeat the operation 3 times until the air is completely removed, and then evacuate, so that the compacted carbon nanotubes The tube and the silicon iodide mixture are under vacuum, and the vacuum degree is maintained at 9.0×10 -8 mbar;

[0026] S 3 , pass in a pulse current, the current size is 10mA-100A, preferably 1A, the current pulse time is 0.1-10s, heat the mixture of carbon nanotubes and silicon iodide to 1100 ° C, silicon iodide is pyrolyzed, and silicon i...

Embodiment 2

[0031] This embodiment is illustrated by coating a titanium layer on the surface of carbon nanotubes as an example, and the specific steps are as follows:

[0032] S 1 , according to the carbon-titanium molar ratio of 1:0.6-1.8, respectively weigh whisker-shaped multi-walled carbon nanotubes and titanium iodide, mix uniformly and compact;

[0033] S 2 , connect the compacted carbon nanotubes and titanium iodide mixture with a pair of graphite electrodes; then evacuate and pass argon gas in sequence, repeat the operation 3 times until the air is completely removed, and then evacuate, so that the compacted carbon nanotubes The tube and the titanium iodide mixture are under vacuum, and the vacuum degree is maintained at 9.0×10 -8 mbar;

[0034] S 3 , pass a pulse current, the current size is 10mA-100A, preferably 0.5A, the current pulse time is 0.1-5s, heat the mixture of carbon nanotubes and titanium iodide to 700 ° C, titanium iodide pyrolyzes, and forms on the surface of c...

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Abstract

The invention relates to the technical field of advanced materials, in particular to a carbon nanotube surface plating method. The plating method includes the following steps of mixing a carbon nanotube with an iodide of plating materials uniformly to obtain a mixture and compacting the mixture; connecting the compacted mixture to the space between a pair of graphite electrodes and vacuuming; introducing a pulse current in vacuum condition, heating the compacted mixture until the iodide pyrolysis takes place, and plating the carbon nanotube surface with plating materials while releasing the iodine vapor; and lowering the temperature and introducing an inert gas to remove the iodine vapor, and completing the carbon nanotube surface plating. By mixing the carbon nanotube with the iodide of the plating materials, the iodide can be quickly thermally decomposed through heat generated by the self-heating of the carbon nanotube after being powered on. By plating the surface of the carbon nanotube with the plating materials, the preparation method is simple and convenient to operate, the preparation method can be applied to large-scale production and the method is economical, effective andenvironmentally friendly.

Description

technical field [0001] The invention relates to a technology in the field of advanced materials, in particular to a method for coating the surface of carbon nanotubes. Background technique [0002] Compared with untreated carbon nanotubes, carbon nanotubes with coatings have obvious advantages in physical properties, such as tensile strength, yield strength, hardness, wear resistance and other properties have been significantly improved, and the development prospects are broad. [0003] There are many problems in the traditional method of coating carbon nanotubes, which is not suitable for large-scale production. On the one hand, it is because carbon nanotubes need to be dispersed to improve the uniformity of coating; carbon nanotubes can be dispersed by high-speed ball milling or low-speed ball milling, but both high-speed ball milling and low-speed ball milling are only It is suitable for the preparation of a small amount of samples in the laboratory. In large-scale produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/04C23C20/06B82Y30/00
CPCB82Y30/00C23C20/04C23C20/06
Inventor 刘媛薛波董明
Owner SUZHOU FIRST ELEMENT NANO TECH
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