Carbon fiber surface treatment method

Abstract

The invention relates to carbon fiber surface treatment method. The method is characterized in that under an atmospheric pressure, nitrogen is taken as the carbon fiber surface treatment medium so as to generate low-temperature plasma to bombard the surface of moving carbon fiber bundles by ions. After the surface treatment, the active polar functional groups on the carbon fiber surface are increased, the grooves on the carbon fiber surface are deepened, the specific surface area is enlarged, the interlayer shearing strength of the composite material of carbon fibers is enhanced, the energy consumption is reduced, the energy is saved, and the method is clean and pollution-free.

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] Because carbon fiber has high elastic modulus, high specific strength and excellent heat resistance, it can be combined with high polymer to obtain composite materials with excellent mechanical properties, which have been widely used in aviation, aerospace, sports equipment, civilian fishing gear, etc. . However, the surface of untreated carbon fiber is very smooth, the specific surface area is small, and it shows hydrophobicity, so the interface with the polymer is poor, resulting in low strength of the composite material, and the superior performance of carbon fiber has not been effectively utilized. Therefore, before the composite of carbon fiber and resin, it is necessary to treat the surface to improve the interface between the fiber and the mat...

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Problems solved by technology

However, the currently studied low-temperature plasma carbon fiber surface treatment method is mainly under vacuum conditions, which cannot achieve continuous production in the carbon fiber surface treatment process.

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