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Preparation method of high-strength, high-toughness, high-conductivity single-walled carbon nanotube fibers

A single-walled carbon nanotube, high toughness technology, applied in the processing and application of nanomaterials, can solve problems such as poor mechanical properties, electrical conductivity and toughness, and achieve the effects of improving mechanical properties, good electrical conductivity, and increased density

Active Publication Date: 2020-05-22
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a high-strength, high-toughness, high-conductivity single-wall carbon nanotube fiber, which solves the problems of poor mechanical properties, electrical conductivity and toughness of the single-wall carbon nanotube fiber in the prior art

Method used

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  • Preparation method of high-strength, high-toughness, high-conductivity single-walled carbon nanotube fibers
  • Preparation method of high-strength, high-toughness, high-conductivity single-walled carbon nanotube fibers
  • Preparation method of high-strength, high-toughness, high-conductivity single-walled carbon nanotube fibers

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Effect test

Embodiment 1

[0029] The CVD preparation method of different single-walled carbon nanotube films: adopt the box-type furnace with constant temperature zone length at 200mm, utilize hydrogen-argon mixed gas (90% argon, 10% hydrogen) as catalytic gas, utilize xylene as carbon source ( 100ml), use ferrocene (25-30g) and elemental sulfur (0.5-1g) as catalysts, set the reaction temperature to 1150-1250°C, control the growth time to 1h, and can prepare single-walled carbon nanometers with a uniform thickness of 1mm tube film. By changing the growth time, the thickness of the single-walled carbon nanotube film can be changed.

Embodiment 2

[0031] The single-walled carbon nanotube film with a thickness of 1 mm obtained in Example 1 is fixed horizontally, one end is fixed on the electric motor, and the other end is fixed on a weight with a weight of 50 g, the electric motor is started, and the electric motor drives the single-walled carbon nanotube film. The carbon nanotube film is rotated and spun into cylindrical fibers to obtain single-walled carbon nanotube fibers with a diameter of about 200 μm.

Embodiment 3

[0033] The single-walled carbon nanotube film with a thickness of 1 mm obtained in Example 1 is fixed horizontally, one end is fixed on the electric motor, and the other end is fixed on a weight with a weight of 100 g, the electric motor is started, and the electric motor drives the single-walled carbon nanotube film. The carbon nanotube film was spun and spun into cylindrical fibers to obtain single-walled carbon nanotube fibers with a diameter of about 190 μm.

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Abstract

The invention puts forward a high strength, high toughness and high conductivity single-walled carbon nanotube fiber, and solves the problems of poor mechanical properties, electrical conductivity andtoughness of single-walled carbon nanotube fiber in the prior art. The method is carried out in the following way of: S01, preparing a single-walled carbon nanotube film by CVD; S02, adding a weightto the single-walled carbon nanotube film, and then performing spinning to obtain single-walled carbon nanotube fiber; and S03, using a rolling mill to flatten the single-walled carbon nanotube fiberinto densified fiber. The method provided by the invention employs chemical vapor deposition to prepare the single-walled carbon nanotube film, and the obtained single-walled carbon nanotube film hashigh mechanical strength and good electrical conductivity and thermal conductivity. Then spinning method is employed to weave the single-walled carbon nanotube film into fiber, also mechanical rollingis utilized to greatly improve the density of single-walled carbon nanotube fiber and increase mutual contact between single-walled carbon nanotubes, thus improving the mechanical properties of the carbon nanotube fiber.

Description

technical field [0001] The invention belongs to the technical field of processing and application of nanometer materials, and in particular relates to a preparation method of single-walled carbon nanotube fibers. Background technique [0002] As a material with excellent electrical, mechanical, and thermal properties, carbon nanotubes have attracted much attention from scientists and are widely used in supercapacitors, sensors, wires, and semiconductor components. With the characteristics of light weight, flexibility, high strength, electrical conductivity, thermal conductivity, and weaving, it has broad application prospects in the fields of multifunctional fibers, functional composite materials, sensing, energy materials, and flexible wearable devices. However, the highest strength of carbon nanotube fibers obtained by researchers so far is 8.8GPa, and the modulus is 357GPa, which are several orders of magnitude lower than those of single carbon nanotubes. How to realize ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12C01B32/159C01B32/16B82Y40/00
Inventor 上媛媛曹安源
Owner ZHENGZHOU UNIV
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