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Preparation method of single-walled carbon nanotube powder

A single-walled carbon nanotube and powder technology, applied in the direction of single-walled carbon nanotubes, carbon nanotubes, nanocarbons, etc., can solve the problems of low purity and uneven diameter distribution of single-walled carbon nanotubes, and achieve mechanical properties. Enhanced and guaranteed performance

Pending Publication Date: 2022-03-25
哈尔滨金纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention solves the technical problems of low purity and uneven diameter distribution of the existing single-wall carbon nanotubes, and provides a preparation method of single-wall carbon nanotube powders

Method used

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  • Preparation method of single-walled carbon nanotube powder
  • Preparation method of single-walled carbon nanotube powder

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specific Embodiment approach 1

[0028] Specific embodiment one: the preparation method of a kind of single-walled carbon nanotube powder of this embodiment is carried out according to the following steps:

[0029] 1. In N 2 Under protection, raise the temperature of the reaction chamber to 660°C at a heating rate of 5°C / min, and keep it warm for 45 minutes;

[0030] 2. Continuously feed N into the reaction chamber 2 、H 2 and C 3 h 6 At the same time, the iron plasma is injected into the reaction chamber with an emission current of 5mA. The reaction time is 0.25h, and 232mg of black powder is obtained, that is, single-walled carbon nanotube powder with a diameter of 2.3nm and a carbon content of is 88.50%, and the purity is 86.45%; the N in the mixed gas 2 、H 2 and C 3 h 6 The flow ratio is 3:4:1. The SEM picture of the obtained single-walled carbon nanotube powder is as follows figure 1 shown.

specific Embodiment approach 2

[0031] Specific embodiment two: the preparation method of a kind of single-walled carbon nanotube powder of the present embodiment is carried out according to the following steps:

[0032] 1. Under the protection of Ar, raise the temperature of the reaction chamber to 710°C at a heating rate of 5°C / min, and keep it warm for 50 minutes;

[0033] 2. Continuously feed Ar and H into the reaction chamber 2 and C 3 h 8 At the same time, cobalt plasma is injected into the reaction chamber with an emission current of 8mA. The reaction time is 35min, and 315mg of black powder is obtained, that is, single-walled carbon nanotube powder with a tube diameter of 1.8nm and a carbon content of 86.50%, the purity is 84.25%; Ar, H in the mixed gas 2 and C 3 h 8 The flow ratio is 1.5:2:1. The SEM picture of the obtained single-walled carbon nanotube powder is as follows figure 2 shown.

specific Embodiment approach 3

[0034] Specific embodiment three: the preparation method of a kind of single-walled carbon nanotube powder of this embodiment is carried out according to the following steps:

[0035] 1. Under the protection of Ar, raise the temperature of the reaction chamber to 850°C at a heating rate of 5°C / min, and keep it warm for 40 minutes;

[0036] 2. Continuously feed Ar and H into the reaction chamber 2 and the mixed gas of anhydrous ethanol vaporized at 150°C, inject iron plasma into the reaction chamber with an emission current of 10mA at the same time, and the reaction time is 40min to obtain 504mg of black powder, that is, single-walled carbon nanotube powder , the tube diameter is 2.35nm, the carbon content is 89.35%, and the purity is 86.55%; Ar, H in the mixed gas 2 The flow ratio of absolute ethanol vaporized at 150°C is 1.5:2:1.

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Abstract

The invention relates to a preparation method of single-walled carbon nanotube powder. The invention belongs to the technical field of carbon nanotubes and preparation thereof. The technical problems that an existing single-wall carbon nano tube is low in purity and uneven in tube diameter distribution are solved. The preparation method of the single-walled carbon nanotube powder comprises the following steps: 1, heating a reaction cavity to 600-1200 DEG C under the protection of inert gas, and keeping the temperature for 30-60 minutes; 2, mixed gas of inert gas, hydrogen and gaseous carbonaceous organic matter is continuously introduced into the reaction cavity, meanwhile, transition metal plasma is injected into the reaction cavity, the reaction time ranges from 0.2 h to 10 h, and the single-walled carbon nanotube powder is obtained. The single-walled carbon nanotube disclosed by the invention does not need to be further purified, and a good structure of the single-walled carbon nanotube is reserved to the greatest extent, so that performance exertion is ensured. The conductive additive can be applied to various materials, and has a mechanical property enhancing effect.

Description

technical field [0001] The invention belongs to the technical field of carbon nanotubes and preparation thereof, and in particular relates to a preparation method of single-walled carbon nanotube powder. Background technique [0002] The shape of carbon nanotubes is a one-dimensional cylindrical hollow structure, which can also be understood as a curled graphite sheet structure, and can be divided into single-walled carbon nanotubes and multi-walled carbon nanotubes. The diameter is several to hundreds of nanometers, and the length is generally in the order of microns, which is several times or even tens of thousands of times the diameter. Therefore, carbon nanotubes have a relatively large aspect ratio. From the performance point of view, carbon nanotubes have good thermal conductivity, electrical conductivity and mechanical strength, which can be used in composite materials, additives, etc., to enhance the strength and electrical conductivity of materials. In terms of pre...

Claims

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Application Information

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IPC IPC(8): C01B32/159C01B32/16
CPCC01B32/159C01B32/16C01B2202/36C01B2202/02
Inventor 刘强何斌张超李朋黄利新
Owner 哈尔滨金纳科技有限公司
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