Carbon fiber surface treatment method

Abstract

The invention relates to a carbon fiber surface treatment method. The method comprises that under an atmosphere environment, air is adopted as a carbon fiber surface treatment medium, electroneutral low temperature plasma is emitted by a plasma emitting device for low temperature plasma bombardment to the surface of a moving carbon fiber tow at a speed of 60-150m / h; the ambient temperature of carbon fiber treatment ranges from -10DEG C to 50DEG C; the gap between the carbon fiber and the plasma emitting device is 5-30mm; the ambient humidity of carbon fiber surface treatment is 30-90%; the power of carbon fiber surface treatment ranges from 500 to 800W / tow; and the temperature of carbon fiber surface treatment by low temperature plasma is 30DEG C-100DEG C. The method of the invention can enhance the content of active and polar functional groups on the carbon fiber surface, deepen grooves on the carbon fiber surface, increase the specific surface area, improve the interlaminar shear strength of carbon fiber composite materials, save energy and reduce energy consumption, and is clean and free of pollution.

Description

Technical field: [0001] The invention relates to a carbon fiber surface treatment method, which is mainly applied to the carbon fiber surface treatment process in the carbon fiber production link. Background technique: [0002] There are many methods for carbon fiber surface treatment, among which low-temperature plasma technology is a new material surface treatment technology that only started in the 1960s. This technology is a dry process, which has the advantages of energy saving and pollution-free, and can meet the requirements of environmental protection; the processing time is short and the efficiency is high; compared with other dry processes such as radiation treatment and electron beam treatment, its unique The effect depth of plasma surface treatment is only in the range of a few nanometers to hundreds of nanometers from the surface of the material, and only the physical and chemical properties of the material surface are changed, while the properties of the materi...

AI Technical Summary

Problems solved by technology

However, the electrodes of these low-temperature plasma equipment are exposed, and the high-pressure and low-temperature plasma generated by these low-temperature plasma equipment during the carbon fiber production process will make the carbon fiber conductive, which will put the on-site workers at risk of electric shock

Carbon fiber fines dust from the carbon fiber production process can short-circuit these devices and stop them from working

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