Ultrasonic atomization humidification method for production of carbon fiber

Abstract

The invention discloses an ultrasonic atomization humidification method for production of a carbon fiber. The method comprises the following steps: (1) ultrasonic atomization: a step of carrying out ultrasonic oscillation and atomization on humidification liquid to obtain a fog granule and controlling relative humidity in an atomization humidification apparatus to be 30 to 99% by adjusting the frequency of ultrasonic oscillation and the addition amount of the humidification liquid; and (2) humidification: a step of humidifying the carbon fiber in the atomization humidification apparatus until moisture content of the carbon fiber is 0.5 to 10%. According to the method, after humidification of the carbon fiber, the moisture content in the carbon fiber is low, energy consumption for drying of the carbon fiber in subsequent production is low, so more production cost is saved compared with the prior art; after humidification, the fog granule adheres onto the surface of the carbon fiber, so the interior structure of the carbon fiber is not destroyed, mechanical damage to the carbon fiber during production is reduced, and thus, strength of the carbon fiber is maximumly protected from decrease in subsequent production procedures and performances like tensile strength of a carbon fiber product are eventually improved.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber production, in particular to an ultrasonic atomization humidification method for carbon fiber production. Background technique [0002] In the middle and late 20th century, carbon fiber began to be used in aerospace, sporting goods and other fields due to its excellent performance as a fiber-reinforced composite material. With the improvement of the performance of carbon fiber products and the development of fiber-reinforced composite material technology, carbon fiber is more and more widely used in aerospace, national defense and military industry, cultural and sports equipment, medical equipment, new energy and civil engineering and other fields. The demand for high-performance carbon fiber volume also increased rapidly. The carbon fiber manufacturing process includes pre-oxidation, carbonization, surface treatment and other steps, and each step has a vital impact on the quality of carbon ...

AI Technical Summary

Problems solved by technology

On the one hand, this makes the impregnation liquid in the raw silk in subsequent production require higher energy consumption during drying, which increases the production cost; on the other hand, due to the impregnation of too much liquid on the raw silk, the liquid will enter the interior of the raw silk, To a certain extent, the internal structure of the precursor is destroyed to reduce the performance of the precursor, and finally reduce the tensile strength and other properties of the carbon fiber product.