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Preparation method for conductive carbon nanotube

A technology for conducting carbon nanotubes and tube furnaces, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of reduced conductivity, limited application, cumbersome process, etc., and achieves reduction of residual oxygen-containing functional groups. The method is quick and easy, and the effect of excellent electrical conductivity

Pending Publication Date: 2019-05-07
HUAIAN COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

How to prepare carbon nanotubes with high purity and few structural defects is a prerequisite for in-depth research and application. How to obtain a preparation method that is easy to control, low production cost, high raw material utilization, few structural defects, and high purity still needs to be done. Further in-depth research; the absence of some carbon atoms in the production and preparation makes the prepared carbon nanotubes contain more defects, which reduces their electrical conductivity, thereby limiting their application in fields that require high quality carbon nanotubes
However, the process of the existing preparation method is still relatively cumbersome and time-consuming. In addition, the conductivity of the prepared carbon nanotubes is still poor, and it is difficult to meet the requirements of the conductive industry, the electrode conductive industry, and the conductive industry with high light transmittance. Require

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  • Preparation method for conductive carbon nanotube
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preparation example Construction

[0020] A preparation method of conductive carbon nanotubes, the preparation method comprising the following steps:

[0021] S1. Weigh the catalyst and dissolve it in the organic carbon source, let the quartz glass sheet stand for more than 20 hours, and push it into the tube furnace reactor;

[0022] S2, feed N at room temperature 2 Remove the air in the tube furnace reactor and continue to feed N 2 , heating to raise the furnace temperature from room temperature to the cracking temperature, when the furnace temperature rises to the cracking temperature, start to feed H 2 , react for several hours, stop feeding H 2 , turn down N 2 flow rate, the reaction was cooled to 100°C in a nitrogen protective atmosphere, and the sample was scraped off from the quartz plate to obtain the desired conductive carbon nanotubes.

[0023] The catalyst is at least one of commercially available Fe / Co, Fe / Ni, Fe / Cu and Ni / Ag.

[0024] The organic carbon source is at least one of o-xylene, p-x...

Embodiment 1

[0029] A kind of conductive carbon nanotube, its preparation process is as follows:

[0030] S1. Mix 2g Fe / Co and 25g o-xylene, let the quartz glass sheet stand for 20h, and push it into the tube furnace reactor;

[0031] S2, feed N at room temperature 2 Exclude the air in the reaction system, feed 500mL / min N 2 . Raise the furnace temperature from room temperature to the cracking temperature within 15 hours. When the furnace temperature rises to the cracking temperature, start to feed 200mL / min flow of H 2 , react for 5h, stop feeding H 2 , reduce the nitrogen flow rate, cool the reaction to 100°C in a nitrogen protective atmosphere, take out the sample, and scrape it off the quartz plate to obtain the desired sample.

Embodiment 2

[0033] A kind of conductive carbon nanotube, its preparation process is as follows:

[0034] S1, mix 1.5g Fe / Ni and 28g o-xylene, let the quartz glass sheet stand for 25h, and push it into the tube furnace reactor;

[0035] S2, feed N at room temperature 2 Exclude the air in the reaction system, feed 500mL / min N 2 . Raise the furnace temperature from room temperature to the cracking temperature within 15 hours. When the furnace temperature rises to the cracking temperature, start to feed 200mL / min flow of H 2 , react for 5h, stop feeding H 2 , reduce the nitrogen flow rate, cool the reaction to 100°C in a nitrogen protective atmosphere, take out the sample, and scrape it off the quartz plate to obtain the desired sample.

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Abstract

The invention discloses a preparation method for a conductive carbon nanotube. The preparation method comprises the following steps: S1, weighing a catalyst, dissolving the catalyst into an organic carbon source, carrying out standing on a quartz glass sheet for 20 h or more, and pushing the quartz glass sheet into a tubular furnace reactor; and S2, introducing N2 into the tubular furnace reactorat a room temperature so as to remove air from the tubular furnace reactor, continuing introducing the N2, carrying out heating until the temperature of the tubular furnace reactor is raised from a room temperature to a cracking temperature, when the temperature of the tubular furnace reactor is raised to the cracking temperature, starting introducing H2, carrying out a reaction for a plurality ofhours, stopping introducing the H2, reducing the flow rate of the N2 until the reaction is cooled to 100 DEG C in a nitrogen gas protection atmosphere, and scraping a sample from the quartz glass sheet so as to obtain a desired conductive carbon nanotube. The preparation method provided by the invention has the following advantages: a carbon nanotube is prepared through a catalyst atmosphere reduction method, and hydrogen gas is adopted as a reducing agent, so the preparation method is non-toxic, healthy and environmentally-friendly, and can reduce residual oxygen-containing functional groupsin the process of reduction; and the catalyst is added in the process of reduction, and the loss of energy groups can be further reduced, so the carbon nanotube contains more conductive groups and has excellent electrical conductivity, and the preparation method is applicable to industrial production of carbon nanotubes.

Description

technical field [0001] The invention relates to the field of synthesis methods of conductive new materials, in particular to a method for preparing conductive carbon nanotubes. Background technique [0002] Carbon nanotubes (CNTs for short) is a one-dimensional quantum material with a special structure. Its radial dimension can reach the nanometer level, and its axial dimension is microns. The tubular structure formed by curling atomic layers has a diameter ranging from one nanometer to tens of nanometers, and a length of up to several centimeters. At the same time, the huge aspect ratio is expected to make it into a carbon fiber with excellent toughness. Due to its large aspect ratio, excellent mechanical, electrical, magnetic, thermodynamic properties and wide application prospects, it has attracted the attention of a large number of researchers for a long time. These outstanding features make carbon nanotubes suitable for a variety of practical applications. Among them, ...

Claims

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Application Information

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IPC IPC(8): C01B32/162
Inventor 王鸿翔
Owner HUAIAN COLLEGE OF INFORMATION TECH