Method for preparing carbon fiber automobile brake material

A technology of automobile brakes and carbon fiber, applied in the field of brake materials, can solve the problems of low shear strength and high wear rate, and achieve the effect of improving the degree of fusion

Active Publication Date: 2015-07-22
安徽省金寨县世隆生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the problems of high wear rate and low shear strength of carbon fiber-based automobile brake disc materials, the above-mentioned performances are mainly improved by modifying carbon fibers and fillers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1, under ice bath conditions, add 15g of dimethyl sulfoxide dropwise to 20g of aluminum trichloride, after the dropwise addition, heat to dissolve aluminum trichloride to obtain aluminum trichloride solution; 40g of vinyl alcohol and 40g of PAN-based carbon fiber (the length of carbon fiber is 0.5-5mm) are mixed in 300g of dimethyl sulfoxide, and after mixing evenly, they are added to the aluminum chloride solution for reaction, and the reaction time is 5h; after the reaction, Wash the solid phase in the reaction system with a mixed solution of methanol and dilute hydrochloric acid, the volume ratio of methanol and dilute hydrochloric acid is 1:4, the mass concentration of hydrochloric acid is 7wt%, and then depressurize the solid phase at 35°C After drying for 3 hours, it was added to an inverted conical stainless steel fluidized bed for spraying, and 3 g of silane coupling agent KH-550 was sprayed in to obtain modified carbon fibers;

[0024] In the second step, ...

Embodiment 2

[0027] Step 1, under ice bath conditions, add 20 g of dimethyl sulfoxide dropwise to 30 g of aluminum trichloride, after the dropwise addition, heat to dissolve aluminum trichloride to obtain aluminum trichloride solution; 80g of vinyl alcohol and 55g of PAN-based carbon fiber (the length of carbon fiber is 0.5-5mm) are mixed in 400g of dimethyl sulfoxide, and after mixing evenly, they are added to the aluminum chloride solution for reaction, and the reaction time is 10h; after the reaction, Wash the solid phase in the reaction system with a mixed solution of methanol and dilute hydrochloric acid, the volume ratio of methanol and dilute hydrochloric acid is 1:6, the mass concentration of hydrochloric acid is 12wt%, and then depressurize the solid phase at 45°C After drying for 4 hours, it was added to an inverted conical stainless steel fluidized bed for spraying, and 6 g of silane coupling agent KH-550 was sprayed to obtain modified carbon fibers;

[0028] Step 2: React 5 g o...

Embodiment 3

[0031] Step 1, under ice bath conditions, add 17g of dimethyl sulfoxide dropwise to 25g of aluminum trichloride, after the dropwise addition, heat to dissolve aluminum trichloride to obtain aluminum trichloride solution; 70g of vinyl alcohol and 50g of PAN-based carbon fiber (the length of carbon fiber is 0.5-5mm) are mixed in 350g of dimethyl sulfoxide, and after mixing evenly, they are added to the aluminum chloride solution and reacted for 8 hours; after the reaction, Wash the solid phase in the reaction system with a mixed solution of methanol and dilute hydrochloric acid, the volume ratio of methanol and dilute hydrochloric acid is 1:5, the mass concentration of hydrochloric acid is 10wt%, and then depressurize the solid phase at 40°C After drying for 4 hours, it was added to an inverted conical stainless steel fluidized bed for spraying, and 5 g of silane coupling agent KH-550 was sprayed to obtain modified carbon fibers;

[0032] Step 2: React 4 g of methoxyxylene, 9 g ...

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Abstract

The invention discloses a method for preparing a carbon fiber automobile brake material, and belongs to the technical field of brake materials. The method includes the steps that modified carbon fibers and modified phenolic resin are prepared first; then the modified carbon fibers, the modified phenolic resin, calcium carbonate, iron powder, magnesium oxide, graphite and potassium titanate whisker are evenly mixed; afterwards, the mixture is subjected to compression molding forming in a hot press, after cooling is completed, heat treatment is conducted, and accordingly the brake material is obtained after polishing is completed. According to the method, surface modification is conducted on carbon fibers, the fusion degree of the carbon fibers and other materials can be effectively improved, the shearing strength of the brake material can be effectively enhanced, and the abrasion rate is lowered.

Description

technical field [0001] The invention discloses a preparation method of a carbon fiber automobile brake material, which belongs to the technical field of brake materials. Background technique [0002] The brake material should have three main functions: 1. Friction elements, which can generate a large enough braking torque; 2. Heat storage, which can absorb all the heat converted from the kinetic energy of traffic equipment and dissipate it in time; 3. Structural components, Can transmit the braking torque to the tires. This requires that the brake material has a high friction coefficient, thermal conductivity and sufficient strength and toughness. C / C brake materials have become a research hotspot in the field of brakes since the 1970s abroad. The development of C / C composite materials in my country started in the 1970s, and gradually became a research hotspot after the 1990s. Foreign research on C / SiC brake materials began in the 1990s, and has rapidly become a research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/02
Inventor 孟红琳
Owner 安徽省金寨县世隆生物科技有限公司
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