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Corona discharge based carbon fiber surface treatment device and method

A technology of surface treatment and corona discharge, which is applied in the direction of ultrasonic/sonic fiber treatment, etc., can solve the problems of high modulus carbon fiber treatment, such as ineffective treatment, failure to meet performance requirements, loss of carbon fiber strength, etc., to achieve large elastic space, carbon fiber Less strength loss and improved shear strength

Active Publication Date: 2014-07-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anodic electrolytic oxidation method has the following disadvantages: high power consumption; the treatment effect on high modulus carbon fiber is not obvious, and the performance requirements cannot be met; the effect is single, and it can only increase the oxygen-containing groups on the surface of the fiber; resulting in loss of carbon fiber strength

Method used

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  • Corona discharge based carbon fiber surface treatment device and method
  • Corona discharge based carbon fiber surface treatment device and method

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Effect test

Embodiment 1

[0032] The carbon fiber corona discharge surface treatment process is arranged after the carbonization process of carbon fiber production, such as figure 1 As shown, there is residual heat after the carbon fiber comes out of the carbonization furnace, and the carbon fiber is subjected to corona discharge surface treatment at a position where the carbon fiber temperature is 120 °C; the carbon fiber enters the sizing tank for sizing after the corona discharge surface treatment.

[0033] figure 2 It is a schematic structural diagram of a device for corona discharge-based carbon fiber surface treatment. Such as figure 2 As shown, the device for surface treatment of carbon fibers based on corona discharge includes a large roller 1 , carbon fibers 2 , small rollers 3 , auxiliary rollers 4 and a surface treatment chamber 5 . There are two sets of corona discharge devices inside the surface treatment chamber 5, and the corona discharge devices are composed of a large roller 1 and ...

Embodiment 2

[0039] The carbon fiber corona discharge surface treatment process is arranged after the carbonization process of carbon fiber production, such as figure 1 As shown, there is residual heat after the carbon fiber comes out of the carbonization furnace, and the carbon fiber is subjected to corona discharge surface treatment at a position where the carbon fiber temperature is 90 °C; the carbon fiber enters the sizing tank for sizing after the corona discharge surface treatment.

[0040] figure 2 It is a schematic structural diagram of a device for corona discharge-based carbon fiber surface treatment. Such as figure 2 As shown, the device for surface treatment of carbon fibers based on corona discharge includes a large roller 1 , carbon fibers 2 , small rollers 3 , auxiliary rollers 4 and a surface treatment chamber 5 . There are two sets of corona discharge devices inside the surface treatment chamber 5, and the corona discharge devices are composed of a large roller 1 and a...

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Abstract

The invention discloses a corona discharge based carbon fiber surface treatment device and method. The device comprises a large roller, a small roller, an auxiliary roller and a surface treatment cavity, wherein the surface treatment cavity is internally and at least provided with a set of corona discharge device composed of the large roller and the small roller, the distance between the outer surfaces of the large roller and the small roller is 3-15mm, and the large roller and the smaller roller are matched with each other to be used as two electrodes for corona discharge; a carbon fiber has waste heat after being output from a carbonization furnace, the temperature of the carbon fiber is controlled at 45-120 DEG C in the surface treatment cavity, and the carbon fiber is subjected to corona discharge surface treatment through the at least one set of corona discharge device in the surface treatment cavity. When the corona discharge based carbon fiber surface treatment device is used for carrying out surface treatment on the carbon fiber, the strength loss of the carbon fiber is low; the surface treatment effect for high-modulus carbon fiber with high surface crystallinity is remarkable; no waste liquid is discharged, and low environment pollution is caused; the surface free energy of the carbon fiber is increased, and the interlaminar shear strength of a carbon fiber composite is remarkably improved.

Description

technical field [0001] The invention relates to a carbon fiber production device, in particular to a device and method for surface treatment of carbon fibers by using corona discharge, which is suitable for online surface treatment of carbon fibers during the production of high modulus carbon fibers and graphite fibers. Background technique [0002] Carbon fiber and its composite materials have a series of excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and small thermal expansion coefficient. However, carbon fiber as a reinforcing material, Because its surface is composed of highly crystalline graphite, it has strong surface inertia. If it is used directly without surface treatment, the affinity between carbon fiber and substrate in the composite material is very weak, and the load cannot be transferred between the resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/02
Inventor 汤勇谢颖熙陆龙生袁伟万珍平李宗涛李华宙
Owner SOUTH CHINA UNIV OF TECH
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