High-toughness carbon nanotube modified carbon fiber reinforced paper-based friction material and preparation method thereof

Abstract

The invention discloses a high-toughness carbon nanotube modified carbon fiber reinforced paper-based friction material. The high-toughness carbon nanotube modified carbon fiber reinforced paper-based friction material is prepared from the following raw materials in parts by weight: 1.1 to 1.4 parts of nano copper powder, 52 to 54 parts of carbon fibers, 27 to 28 parts of bamboo fibers, 3.5 to 4 parts of carbon nanotube, 2.3 to 2.8 parts of full-vulcanized nano powder carboxy terminated nitrile rubber, 5 to 5.5 parts of aramid pulp, 1.3 to 1.5 parts of silane coupling agent kh-550, 3 to 3.5 parts of cerous nitrate, 14 to 15 parts of zirconium boride, 10 to 12 parts of cashew nut shell oil modified phenolic resin with the solid content of 20 percent, 1.2 to 1.5 parts of nano-hydroxyapatite, 3 to 3.5 parts of polyphenylene sulfide micro-grade powder, 2.8 to 3.2 parts of flexible SiO2 nano fibers and a proper amount of water. According to the high-toughness carbon nanotube modified carbon fiber reinforced paper-based friction material disclosed by the invention, by using the polyphenylene sulfide micro-grade powder and the nano-hydroxyapatite, the toughness and the wear resistance of the friction material are improved; by using the flexible SiO2 nano fibers, the toughness and the deformation resistance are improved.

Description

technical field [0001] The invention relates to the technical field of clutch friction materials, in particular to a high-toughness carbon nanotube modified carbon fiber reinforced paper-based friction material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the automobile industry and the aviation industry, the research in the field of friction materials has also undergone rapid growth. As an important class of wet friction materials, paper-based friction materials are mainly used in clutches in automobile transmission systems. How to improve the friction coefficient, friction stability, heat resistance and wear resistance of paper-based friction materials is still the main problem faced by paper-based friction materials. For this reason, many scholars have started research from two aspects: improving the interfacial bonding between fibers and resin in the material and finding a filler system with excellent fri...

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Problems solved by technology

[0003] The friction material obtained above has good performance, but the material obtained by direct mixing is easy to separate, making the friction performance unstable and the braking performance unstable

The above article uses maleic anhydride to modify carbon nanotubes, which improves the dispersion of carbon nanotubes, can disperse on the surface of bamboo fibers, and form a stable combination with bamboo fibers, but the heat resistance of bamboo fibers is still not satisfactory , although carbon nanotubes improve the heat resistance and friction of bamboo fibers, but under the condition of heat, the polymer substances formed by maleic anhydride are carbonized, and carbon nanotubes are separated from bamboo fibers, which affects the friction properties

[0004] Adding aramid fiber can improve the friction performance of the friction material, but the heat resistance of aramid fiber is poor, which limits its application in heavy-duty machinery

Moreover, the surface of aramid fibers is inert, has a high degree of crystallization, and is not well combined with the matrix, which affects the performance of aramid composite materials.

Rare earth is used to modify the surface of carbon fiber and bamboo fiber to improve the wear resistance and heat resistance of the fiber, but the combination of rare earth and fiber is not firm, and it is easy to separate after friction, resulting in a change in friction performance