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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  • Abstract
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Problems solved by technology

[0006] The invention solves the technical problems of low purity and uneven diameter distribution of the exi

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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Example Embodiment

[0028] DETAILED DESCRIPTION OF THE INVENTION A method of preparing a single wall carbon nanotube powder according to the present embodiment is carried out in the following steps:

[0029] First, in n 2 The reaction cavity was warmed to 660 ° C under the control of the temperature rise rate of 5 ° C / min.

[0030] Second, continuous access to the reaction cavity 2 H 2 And C 3 Hide 6 The mixed gas, and simultaneously radially incorporate iron plasma in the reaction chamber at 5 mA, the reaction time is 0.25 h, and the black powder is 232 mg, that is, the single-walled carbon nanotube powder, the diameter of 2.3 nm, carbon content. It is 88.50%, purity is 86.45%; in which N is mixed. 2 H 2 And C 3 Hide 6 The flow rate is 3: 4: 1. SEM map of the resulting single wall carbon nanotube powder figure 1 Indicated.

Example Embodiment

[0031] DETAILED DESCRIPTION OF THE INVENTION 2: The preparation method of a single-walled carbon nanotube powder according to the present embodiment is carried out in the following steps:

[0032] First, the reaction cavity was warmed to 710 ° C under the heating rate of 5 ° C / min under AR protection.

[0033] Second, continue to access Ar, H in the reaction chamber 2 And C 3 Hide 8 The mixed gas, and at the same time, the cobalt plasma was emitted in the reaction chamber at 8 mA, and the reaction time was 35min to obtain a black powder 315mg, that is, the single-walled carbon nanotube powder, a tube diameter of 1.8 nm, and the carbon content is 86.50%, purity is 84.25%; in which AR, H is mixed 2 And C 3 Hide 8 The flow rate is 1.5: 2: 1. SEM map of the resulting single wall carbon nanotube powder figure 2 Indicated.

Example Embodiment

[0034] BEST MODE FOR CARRYING OUT THE INVENTION 3: The preparation method of a single-walled carbon nanotube powder according to the present embodiment is carried out in the following steps:

[0035] First, the reaction cavity is warmed to 850 ° C under the heating rate of 5 ° C / min under AR protection;

[0036] Second, continue to access Ar, H in the reaction chamber 2 The mixed gas of anhydrous ethanol gasified at 150 ° C, while emitting iron plasma in the reaction chamber at 10 mA, the reaction time is 40 mg, which is 504 mg of black powder, namely single-wanted carbon nanotube powder. The diameter is 2.35 nm, the carbon content is 89.35%, and the purity is 86.55%; in which Ar, H is mixed. 2 And the flow rate ratio of anhydrous ethanol gasified by 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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