Carbon fiber surface treatment method based on ultrasonic strengthening

A surface treatment and ultrasonic strengthening technology, applied in ultrasonic/sonic fiber treatment, carbon fiber and other directions, can solve problems such as electrolyte corrosion of devices, low treatment efficiency, fiber body damage, etc., to achieve fast and efficient treatment speed, simple treatment equipment, Increase the effect of oxygen-containing functional groups

Inactive Publication Date: 2012-08-08
WUHAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The ozone oxidation method is to treat the carbon fiber with high temperature in ozone. The surface area and surface roughness of the treated carbon fiber are increased, which can improve the wettability of the fiber and the resin matrix. Large damage; the electrochemical oxidation method uses carbon fiber as the anode in the electrolytic cell. The electrolyte includes caustic soda, nitric acid, sulfur, phosphoric acid, and potassium dichromate and permanganate solutions. The electrolyte is easy to corrode the device. , pollute the environment, and there are also disadvantages such as cumbersome operation and low processing efficiency

Method used

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  • Carbon fiber surface treatment method based on ultrasonic strengthening
  • Carbon fiber surface treatment method based on ultrasonic strengthening
  • Carbon fiber surface treatment method based on ultrasonic strengthening

Examples

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Effect test

Embodiment 1

[0028] Ultrasonic strengthening surface treatment of carbon fiber is accomplished by a simple ultrasonic generator or its array, the ultrasonic generator 2 such as Figure 1-2 As shown, it is installed above or below the surface treatment tank 5, and the carbon fiber filament 1 is immersed in the liquid medium 4 in the surface treatment tank for drafting. At the same time, the ultrasonic generator radiates ultrasonic waves to the liquid medium for a period of time to reach The purpose of processing carbon fiber. The power of the generator is 1000W (the average ultrasonic intensity is 1W / cm 2 ), the ultrasonic frequency is 20kHz, the liquid medium is hydrogen peroxide solution (concentration 5%), the temperature of the liquid medium is 30 degrees, and the action time is 2 minutes. The action time here can be adjusted by the traction speed. It can be used for production lines that cannot adjust the traction speed Figure 3-4 The method mentioned in the method uses multiple rol...

Embodiment 2

[0032] A simple ultrasonic generator for ultrasonically enhanced surface-treated chopped carbon fibers can be obtained by Figure 5 or Image 6 The shown equipment is completed, the chopped carbon fiber 7 placed on the tray 6 is immersed in the liquid medium in the tank by pressure, and the ultrasonic generator is turned on to irradiate the liquid medium with ultrasonic waves for a period of time, so as to achieve the purpose of surface treatment of carbon fiber. The pressure condition is 0.1 MPa, the power of the ultrasonic generator is 2000 W (the average sound intensity is 2 W / cm 2 ), the ultrasonic frequency is 30 kHz, the liquid medium is degassed water, the liquid medium temperature is 30 degrees, and the action time is 20 minutes. The degree of surface treatment of chopped fibers can be controlled by adjusting the ultrasonic treatment time.

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Abstract

The invention relates to a carbon fiber surface treatment method based on ultrasonic strengthening, comprising the following steps of: soaking carbon fibers into liquid medium in a surface treatment tank, carrying out ultrasonic radiation on the liquid medium by virtue of an ultrasonic generator or an ultrasonic array which is arranged above or below the surface treatment tank, and adjusting ultrasonic processing time according to ultrasonic intensity and frequency, so as to achieve the aim of carrying out the surface treatment on the carbon fibers. The carbon fiber surface treatment method disclosed by the invention has the beneficial effects that: surface morphology, surface roughness and the like of the carbon fibers are improved to improve mechanical properties of carbon fiber composite, and the oil stains produced in the production process of the carbon fiber composite are removed through ultrasonic cleaning at the same time that the carbon fiber is subjected to surface oxidation treatment; and compared with the other traditional methods, the carbon fiber surface treatment method disclosed by the invention has the characteristics of simple treatment equipment, simple and easy operation, no damage to environment, high treatment speed, high treatment efficiency, and easy implementation on assorted online production.

Description

technical field [0001] The invention relates to a carbon fiber surface treatment method based on ultrasonic strengthening. Background technique [0002] Carbon fiber and its composite materials have become extremely One of the important strategic materials. Compared with general carbon materials, it also has the characteristics that general carbon materials do not have, such as its appearance has significant anisotropy, softness, can be processed into various fabrics, and shows high strength along the fiber axis etc. Therefore, its long or short fibers are widely used as reinforcing fillers to prepare composite materials with excellent comprehensive properties, and are widely used in aerospace, military, offshore oil, construction, cultural and sports, industry and transportation and other fields. [0003] The performance of carbon fiber composites depends not only on the constituent materials, but also on the surface properties of carbon fibers, the degree of bonding betw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M10/02D06M101/40
Inventor 吴超群周少锋黄进廖继莉
Owner WUHAN UNIV OF TECH
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