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Preparation method of atomized tannic acid modified polyacrylonitrile carbon fiber

A technology of polyacrylonitrile carbon fiber and polyacrylonitrile fiber is applied in the field of preparation of atomized tannic acid-modified polyacrylonitrile carbon fiber, which can solve the problem of reducing friction and adhesion, reducing the force between molecular chains, and low tensile strength of carbon fiber. problem, to achieve the effect of harmless to human body and simple preparation steps

Inactive Publication Date: 2016-09-21
高大元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the low tensile strength of the existing polyacrylonitrile (PAN)-based carbon fiber, and the problems of adhesion and friction between monofilaments, damage to the surface of the original filaments and surface defects, a The tannic acid is atomized, and in the carbon fiber electrospinning process, the small molecular substances in the tannic acid are inserted between the carbon fiber molecular chains, which reduces the force between the carbon fiber molecules, greatly reduces the force between the molecular chains, and reduces its friction and friction. Adhesion, at the same time under the action of an external force field, rearrange the molecular chains of carbon fibers to enhance their compactness, improve the tensile strength and tensile strength of polyacrylonitrile carbon fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, add polyacrylonitrile resin to dimethylformamide at a mass ratio of 1:5, stir and mix and place in a three-necked flask, and heat it in a water bath at 85°C for 45 minutes. After the water bath heating is completed, place the three-necked flask at 200W Under ultrasonic dispersion treatment for 10min, the polyacrylonitrile dispersion was prepared; according to the mass ratio of 1:10, the tannic acid and deionized water were stirred and mixed to prepare the tannic acid solution, which was placed in the atomization device, and then the atomization The compressor in the device is fed with nitrogen to 3MPa, at 10000m 3 Under the action of / h airflow, the tannic acid solution is blown into mist droplets, and then the tannic acid atomization device is placed above the electrospinning device, and the polyacrylonitrile dispersion prepared above is placed on the electrospinning injection nozzle Injection spinning under the conditions of 10kV and receiving distance of 10cm,...

example 2

[0019] First, add polyacrylonitrile resin to dimethylformamide at a mass ratio of 1:5, stir and mix and place in a three-necked flask, heat in a water bath at 87°C for 52 minutes, and after the water bath heating is completed, place the three-necked flask at 250W Under ultrasonic dispersion treatment for 12min, the polyacrylonitrile dispersion was prepared; according to the mass ratio of 1:10, the tannic acid and deionized water were stirred and mixed to prepare the tannic acid solution, which was placed in the atomization device, and then the atomization The compressor in the device is fed with nitrogen to 4MPa, at 12000m 3 Under the action of / h airflow, the tannic acid solution is blown into mist droplets, and then the tannic acid atomization device is placed above the electrospinning device, and the polyacrylonitrile dispersion prepared above is placed on the electrospinning injection nozzle In the process, the injection spinning was carried out at 12kV and the receiving d...

example 3

[0021] First, add polyacrylonitrile resin to dimethylformamide at a mass ratio of 1:5, stir and mix and place in a three-necked flask, and heat it in a water bath at 90°C for 60 minutes. After the water bath heating is completed, place the three-necked flask at 300W Under ultrasonic dispersion treatment for 15min, the polyacrylonitrile dispersion was prepared; according to the mass ratio of 1:10, the tannic acid and deionized water were stirred and mixed to prepare the tannic acid solution, which was placed in the atomization device, and then the atomization The compressor in the device is fed with nitrogen to 5MPa, at 15000m 3Under the action of / h airflow, the tannic acid solution is blown into mist droplets, and then the tannic acid atomization device is placed above the electrospinning device, and the polyacrylonitrile dispersion prepared above is placed on the electrospinning injection nozzle Injection spinning at 15kV and a receiving distance of 15cm, the injection speed...

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Abstract

The invention relates to a preparation method of an atomized tannic acid modified polyacrylonitrile carbon fiber and belongs to the technical field of preparation of polyacrylonitrile carbon fibers. According to the preparation method, tannic acid is atomized; in a carbon fiber electrostatic spinning process, micro-molecular substances in the tannic acid are inserted between carbon fiber molecular chains, and then the acting force between carbon fiber molecules is reduced, so that the acting force between the molecular chains is greatly reduced, and friction and adhesion of the molecular chains are reduced; and meanwhile, under the action of an external force field, the carbon fiber molecular chains are rearranged, so that compactness of the carbon fiber is enhanced, and the tensile strength of the polyacrylonitrile carbon fiber is improved. The prepared modified polyacrylonitrile carbon fiber has the elongation at break reaching more than 110% and the tensile strength reaching more than 1350kg / cm<2>; and meanwhile, preparation steps are simple, and the preparation method is environment-friendly, harmless to human beings and pollution-free.

Description

technical field [0001] The invention relates to a preparation method of atomized tannic acid modified polyacrylonitrile carbon fiber, belonging to the technical field of polyacrylonitrile carbon fiber preparation. Background technique [0002] Polyacrylonitrile (PAN)-based carbon fiber has a simple production process, high carbonization yield, and excellent mechanical properties. It has made great progress since the 1960s and is the mainstream of current carbon fiber industrial production. Carbon fiber is rarely used directly, and most of it is made into intermediate products or composite materials after deep processing. The performance of carbon fiber composites depends not only on its constituent materials, but also on the interface quality between its constituent materials. Good interface bonding can effectively transfer loads, give full play to the characteristics of high-strength and high-modulus reinforced fibers, and improve the mechanical properties of composite mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F11/06
CPCD01F9/22D01F11/06
Inventor 高大元高玉刚
Owner 高大元