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A kind of preparation method of high tensile strength carbon nanotube fiber

A carbon nanotube fiber, high tensile strength technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve the problem of difficult application of carbon nanotubes in macro-scale tensile strength, and achieve enhanced tensile strength and improved cross-linking. rate, the effect of improving the tensile strength

Active Publication Date: 2017-08-25
NANJING POLYTECHNIC INSITUTE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a method for preparing carbon nanofibers with high tensile strength. The method solves the problem of difficult tensile application of carbon nanotubes at the macro scale, and transforms the excellent tensile properties of carbon nanotubes from the micro scale to macroscopic. application provides an effective way to

Method used

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  • A kind of preparation method of high tensile strength carbon nanotube fiber
  • A kind of preparation method of high tensile strength carbon nanotube fiber
  • A kind of preparation method of high tensile strength carbon nanotube fiber

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Experimental program
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Effect test

Embodiment 1

[0027] Carbon nanotube growth conditions, argon atmosphere, pressure 740mmHg, temperature rise to 400°C, according to the flow rate of ethylene 0.300L / min, argon 1.000L / min for 30min; after the growth is completed, water vapor 0.030L / min, argon 2.000 L / min flow rate is cooled to room temperature.

[0028] Using helium as the carrier gas, the prepared carbon nanotubes are functionalized by propylenediamine plasma, and the functionalized carbon nanotubes are prepared into functionalized carbon nanotubes by mechanical traction and twisting (using a twisting machine). fiber with a twist angle of 15 degrees.

[0029] The functionalized carbon nanotube fibers are immersed in a toluene solution containing 5% 4,4-diaminodiphenylmethane epoxy resin, the percentage is the mass fraction, and the crosslinking reaction between carbon nanotubes is carried out at room temperature for 12 hours. After the reaction, the carbon nanotube fibers were washed in a toluene solvent to remove the epox...

Embodiment 2

[0031] Carbon nanotube growth conditions, argon atmosphere, pressure is 720mmHg, temperature rises to 450°C, according to the flow rate of ethylene 0.400L / min, argon 0.800L / min, keep for 30min; then in water vapor 0.020L / min, argon 0.800L / min kept at room temperature under the condition of min.

[0032] Using nitrogen as the carrier gas, the prepared carbon nanotubes were functionalized by ethylenediamine plasma, and the functionalized carbon nanotubes were prepared into functionalized carbon nanotube fibers by mechanical traction and twisting with a twist angle of 10 degrees.

[0033] The functionalized carbon nanotube fibers are immersed in a benzene solution containing 5% triepoxide aminophenol, the percentage is the mass fraction, and the crosslinking reaction between carbon nanotubes is carried out at room temperature for 24 hours. After the reaction, the carbon nanotube fiber was washed in a benzene solution to remove the epoxy resin on the outer surface. The prepared c...

Embodiment 3

[0035] Carbon nanotube growth conditions, argon atmosphere, pressure is 700mmHg, temperature rises to 500°C, according to the flow rate of ethylene 0.500L / min, argon 0.500L / min, keep 20min; then in water vapor 0.030L / min, argon 0.600L / min kept at room temperature under the condition of min.

[0036] Using nitrogen as the carrier gas, the prepared carbon nanotubes were functionalized by propylenediamine plasma, and the functionalized carbon nanotubes were prepared into functionalized carbon nanotube fibers by mechanical traction and twisting with a twist angle of 15 degrees.

[0037] The functionalized carbon nanotube fibers were immersed in a propylene oxide butyl ether solution containing 10% p-aminophenol epoxy resin, and a crosslinking reaction between carbon nanotubes was carried out at room temperature for 20 hours. After the reaction, the carbon nanotube fiber was washed in a benzene solution to remove the epoxy resin on the outer surface. The prepared carbon nanotube f...

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Abstract

The invention relates to a preparation method of high tensile strength carbon nanotube fiber, which belongs to the technical field of nanomaterials and comprises the following steps: step 1: preparing a carbon nanotube primary product; step 2: functionalizing carbon nanotubes; The initial product is plasma-treated by ethylenediamine or propylenediamine to obtain functionalized carbon nanotubes. The plasma treatment process uses helium, nitrogen or oxygen as the carrier gas; step 3: carbon nanotube fiber cross-linking reaction; step 4 : Under the condition of 50°C-200°C, the organic diluent is removed to obtain carbon nanotube fibers with high tensile strength. Compared with the prior art, the present invention has the beneficial effects of: obtaining amine-functionalized carbon nanotubes, and twisting them at a certain angle to further strengthen the tensile strength; using a mixed solution of glycidylamine and diluent to help shrink The epoxy groups on the surface of the glyceramine contact the amine groups of the amine-functionalized carbon nanotubes and realize cross-linking, thereby increasing the cross-linking rate.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotube fibers with high tensile strength, which is used for enhancing the tensile strength of carbon nanotube fibers and belongs to the technical field of nanomaterials. Background technique [0002] Carbon nanotube fiber is a macroscopic material formed by the arrangement of carbon nanotubes along the axial direction. It has the characteristics of high strength, light specific gravity, and excellent thermal and electrical conductivity. It has important application prospects in the fields of aerospace, energy, national defense, and national economy. It is an important research direction to apply the excellent properties of carbon nanotubes to the macroscopic carbon nanofiber scale. [0003] However, in the prior art, when the excellent properties of carbon nanotubes are applied to the scale of macroscopic carbon nanofibers, the excellent tensile strength cannot be maintained. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M10/08D06M15/55D06M13/335D06M101/40
Inventor 于清跃于荟杨晓东刘超沈浩
Owner NANJING POLYTECHNIC INSITUTE
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