Preparation method of continuous carbon nanofiber bundle and preparation method of continuous carbon nanofiber cloth

A nano-carbon fiber, fibril technology, applied in fiber processing, fiber chemical characteristics, textiles and papermaking, etc., can solve problems such as poor fiber uniformity and affecting fiber mechanical properties

Pending Publication Date: 2021-02-12
LVNA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current electrospun carbon nanofibers are mostly in the form of non-woven fabrics, and the uniformity of the fibers is poor, and they are disordered and irregularly arranged, which seriously affects the mechanical properties of the fibers.

Method used

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  • Preparation method of continuous carbon nanofiber bundle and preparation method of continuous carbon nanofiber cloth
  • Preparation method of continuous carbon nanofiber bundle and preparation method of continuous carbon nanofiber cloth
  • Preparation method of continuous carbon nanofiber bundle and preparation method of continuous carbon nanofiber cloth

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preparation example Construction

[0023] The invention provides a method for preparing a continuous carbon nanofiber bundle, wherein the method may comprise the following steps:

[0024] (1) Spinning solution configuration: Dissolve the polymer resin or powder in the solvent and fully stir, let it stand for defoaming, and obtain a uniform spinning system as the electrostatic spinning solution;

[0025] (2) Preparation of precursor fiber bundles: electrospinning the electrospinning solution to obtain continuous fibril bundles or fibril-wrapped yarns with directional arrangement;

[0026] (3) Preparation of carbon nanofiber bundles by high-temperature sintering: first pre-oxidize the fibril bundles or fibril-wrapped yarns in an air atmosphere, and then perform high-temperature sintering on the fibril bundles by segmental heat treatment to prepare carbon nanofiber bundles.

[0027] The present invention provides a kind of preparation method of continuous nanometer carbon fiber cloth, wherein this method can compr...

Embodiment 1

[0044] A method for preparing a continuous carbon nanofiber bundle, comprising the following steps:

[0045] (1) At 30°C, add 14g of polyacrylonitrile (PAN) powder into N,N-dimethylformamide, stir at a rate of 600r / min for 4 to 6 hours until completely dissolved, and the solution is light yellow and transparent Liquid, the PAN / DMF solution that obtains mass fraction is 14wt%;

[0046] (2) Use two medical syringes to extract 10ml of the prepared PAN / DMF solution respectively. The metal hollow needle of the syringe is 8#, fix the two needles, and connect them to the high-voltage positive power supply and the high-voltage negative power supply respectively. The inclination angles were 0° and 15° respectively; the extrusion rates were controlled to be 0.8ml / h and 1.0ml / h respectively, and the electrospinning was carried out under the voltage conditions of 18kV and -18kV; The collected fibers are twisted at a high speed, and finally a continuous directional array of precursor fibe...

Embodiment 2

[0049] A method for preparing a continuous nanometer hollow carbon fiber bundle, comprising the following steps:

[0050] (1) At 30°C, add 14g of polyacrylonitrile (PAN) powder into N,N-dimethylformamide, stir at a rate of 600r / min for 4 to 6 hours until completely dissolved, and the solution is light yellow and transparent Liquid, the PAN / DMF solution that obtains mass fraction is 14wt%;

[0051] (2) Use two medical syringes to extract 10ml of the prepared PAN / DMF solution respectively. The metal hollow needle of the syringe is 8#, fix the two needles, and connect them to the high-voltage positive power supply and the high-voltage negative power supply respectively. The inclination angles were 0° and 15°; the extrusion rates were controlled to be 0.8ml / h and 1.0ml / h respectively, and the electrospinning was carried out under the voltage conditions of 18kV and -18kV; the bobbin of the textile yarn was fixed on On the yarn supply roller of the electrospinning nanofiber bundle ...

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Abstract

The invention discloses a preparation method of a continuous carbon nanofiber bundle and a preparation method of continuous carbon nanofiber cloth. The preparation method of the continuous carbon nanofiber bundle comprises the following steps: (1) preparation of a spinning solution: dissolving polymer resin or powder in a solvent, fully stirring, standing and defoaming to obtain a uniform spinningsystem as the electrostatic spinning solution; (2) preparation of precursor fiber bundles: carrying out electrostatic spinning on the electrostatic spinning solution to obtain continuous fibril bundles or fibril wrap yarns in directional arrangement; and (3) sintering at high temperature to prepare the carbon nanofiber bundle. According to the preparation method of the continuous carbon nanofiberbundle, the continuous carbon nanofiber bundle can be obtained, has the characteristic of controllable diameter, length and microstructure, can be used as a high-performance composite material reinforced fiber, a supercapacitor electrode material and a gas adsorption material, and can be applied to the high-tech fields of aerospace, weapons, ships, nuclear industry and the like.

Description

technical field [0001] The invention relates to a preparation method of a continuous nanometer carbon fiber bundle and a preparation method of a continuous nanometer carbon fiber cloth. Background technique [0002] Carbon fiber is a new type of fiber material with a carbon content of more than 95%. This fiber material has the advantages of high strength and high modulus, low density, high temperature resistance, corrosion resistance, low resistance, high thermal conductivity, etc. In addition, it also has good flexibility. It has a wide range of applications in aerospace, energy storage devices, gas adsorption, transportation, and sports equipment. [0003] Nano or nano hollow carbon fiber bundles are composed of nano carbon fibers, which have excellent physical, chemical and mechanical properties, and at the same time, have good electrical conductivity, thermal conductivity and thermal stability. Continuous carbon nanofiber bundles have good compatibility with metals, res...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F9/17D01F9/21D01F9/24D01F9/16D01D5/00D03D15/275
CPCD01F9/22D01F9/17D01F9/21D01F9/24D01F9/16D01D5/003D01D5/0092D01D5/0069D10B2101/12
Inventor 余煜玺颜少乐郭银清
Owner LVNA TECH CO LTD
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