A kind of preparation method of carbon fiber conductive powder

Abstract

The invention discloses a preparation method of carbon fiber conductive powder, which includes the following processing steps: S1. Preparation of high-purity carbon fiber; S2. Using a vibrating pulverizer to pulverize the carbon fiber prepared in step S1 to prepare a fineness of 300 meshes carbon fiber coarse powder; S3. use an air-jet pulverizer to pulverize the carbon fiber powder prepared in step S2 to prepare carbon fiber fine powder with a fineness of 1000 meshes; S4. use a sand mill to sand the carbon fiber fine powder prepared in step S3 , to prepare a carbon fiber slurry with a particle size of less than 2 μm; the mixed solution is a mixed solution of ethanol and water, and the ratio of ethanol to water is 1:5; S5. Drying the carbon fiber slurry prepared in step S3, drying The dry temperature is 150°C, and the preparation of the conductive powder is completed. The carbon fiber conductive powder prepared by the preparation method has the characteristics of high temperature resistance stability, excellent electrical conductivity, low cost, stable quality and excellent dispersion performance, and has perfect overall functions and strong practicability.

Description

technical field [0001] The invention relates to the technical field of conductive powder, and more particularly, to a preparation method of carbon fiber conductive powder. Background technique [0002] Carbon fiber has good electrical and thermal conductivity, high electrothermal conversion rate, excellent acid and alkali resistance, high temperature resistance and stability, so it has a good application prospect in the field of conductive coatings. At present, the carbon fiber conductive powder filled in carbon fiber conductive coatings is mainly prepared from T300 or T700 or M series graphite fibers by chopped, pulverized, and ground. [0003] At present, the carbon fiber powder widely used in conductive coatings mainly has the following problems. 1. The manufacturing cost of carbon fiber is high, so the powder raw material can only be recycled and processed by waste or leftover material. The quality of the recycled material is not uniform, so the quality of the ground po...

AI Technical Summary

Problems solved by technology

1. The manufacturing cost of carbon fiber is high, so the powder raw material can only be processed after recycling waste or leftover materials. The quality of the recycled material is not uniform, so the quality of the ground powder is not uniform, which has a great impact on the stability of the conductive coating.

2. Carbon fiber has high rigidity and modulus, high strength, and is not easy to be crushed. Therefore, the fineness of carbon fiber powder currently used is generally not less than 1000 mesh, and the particle size distribution is extremely uneven, which leads to the conductivity and uniformity of conductive coatings. Poor sex

3. The conductivity of T series carbon fibers is poor, and it is difficult to achieve lower resistance in the prepared conductive coatings. M series graphitized carbon fibers have high conductivity, but the cost of recycled materials is extremely high, and the low production capacity cannot guarantee long-term stable supply. So the usage is low and the overall performance is not good