Colloid quick removing method for carbon fiber

Abstract

The invention discloses a colloid quick removing method for a carbon fiber, comprising the following steps of: a, connecting two ends of the carbon fiber, which is needed to remove the colloid, to the anode and the cathode of a power supply; b, electrifying the carbon fiber to emit heat; c, measuring the surface temperature of the carbon fiber via a temperature sensor; d, controlling the current so as to control the surface temperature of the carbon fiber, thereby enabling the temperature to satisfy a condition of quickly melting and volatilizing the surface colloid without reducing the mechanical properties of the carbon fiber; e, controlling the colloid removing time, and rolling up the carbon fiber after removing the colloid. On one hand, the surface colloid is melted and volatilized by the heat emitted by the carbon fiber, which solves the defects of long temperature rise time, low colloid removing efficiency, energy wastage and the like of the conventional gaseous oxidation colloid removing mode in which a heat source is arranged at outside of the heated carbon fiber and the heat transfer is finished by convection, radiation and conduction, and is economic and environmentally friendly; on the other hand, the carbon fiber is heated under protective atmosphere, the heating temperature is high, the colloid is removed completely, simultaneously, damage on the surface of the carbon fiber is avoided, the mechanical properties of the carbon fiber are not changed greatly, and strength of the carbon fiber used as a composite material reinforcement is guaranteed.

Description

technical field [0001] The invention relates to a method for removing the surface layer of a material, in particular to a method for quickly removing the glue on the surface layer of a carbon fiber material. Background technique [0002] Carbon fiber is widely used as a reinforcement in resin-based, metal-based, ceramic-based and other composite materials. Since the surface of carbon fiber is coated with an adhesive layer during the production process, its surface energy is low, and the surface shows liquid repellency, resulting in poor bonding between the two-phase interface when carbon fiber and matrix material are composited, and the potential mechanical properties of the composite material cannot be fully utilized. , so carbon fiber often needs to be pretreated before use. [0003] At present, there are mainly gas-phase oxidation and liquid-phase oxidation methods for removing glue on the surface of carbon fibers. [0004] The gas phase oxidation method is to place the...

AI Technical Summary

Problems solved by technology

This method has complex degumming process, low degumming efficiency, and uses a large amount of oxidizing agent, so the cost is high

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