Paper-based friction material with uniform interface and preparation method of paper-based friction material

Abstract

The invention relates to a paper-based friction material with a uniform interface and a preparation method of the paper-based friction material, and belongs to the technical field of material preparation. The method comprises the steps of biologically modifying wollastonite fibers and silicon dioxide powder which are used as friction base materials by using hydrophilic aldehyde-enriched all-grass of Fragrant Elsholtzia so as to improve the dispersity, then co-blending natural rubber and phenolic resin for modification to obtain an adhesive, and finally preparing the paper-based friction material with the uniform interface by using a wet type papermaking method. According to the paper-based friction material and the preparation method, the dispersity of the friction base materials is improved by biological modification, so that friction material slurry can be dispersed more uniformly; finally, the co-blended adhesive is used for soaking the material and then realizes hot-press forming, so that the friction materials can be bonded more compactly, difficult in settling and flocculation and suitable for large-scale production; meanwhile, the paper-based friction material is high in wear resistance, and the wear rate is 0.85*10<-8> to 1.2*10<-8> cm<3> / J.

Description

technical field [0001] The invention relates to a paper-based friction material with a uniform interface and a preparation method thereof, belonging to the technical field of material preparation. Background technique [0002] As the most important wet friction material, paper-based friction material has high dynamic friction coefficient, stable friction torque, dynamic / static friction coefficient close to 1, low cost, stable bonding performance, low wear rate, long service life, low noise and protection Due to the outstanding characteristics of the dual material, the paper-based friction material is a key functional material used in wet clutches and brakes, and its performance directly affects the stability of the transmission torque transmission and the safety of driving. At the same time, the paper-based mocha material is a multi-component composite material, usually composed of more than ten kinds of materials. [0003] In addition to being used in wet clutches and brak...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: traditionally, paper-based friction materials are mostly produced in the water phase by papermaking. When the paper-based friction materials prepared by this method are mixed into a suspension, they are prone to sedimentation and flocculation. The interface is not very uniform, and the wear resistance is not good. The present invention provides a friction base material with wollastonite fiber and silicon dioxide powder, which is biomodified by Gillong grass rich in hydrophilic aldehyde groups. Improve its dispersibility, and then use natural rubber and phenolic resin to blend and modify to obtain an adhesive, and use the method of wet papermaking to finally make a paper-based friction material with a uniform interface. The invention uses biological modification to improve friction base material. The dispersibility of the friction material makes it more evenly dispersed in the friction material slurry. Finally, it is impregnated with the blended adhesive and then hot-pressed to make the friction materials more densely bonded. When the material is made into a suspension, it is easy to settle and flocculate, and it makes up for the lack of uniform interface bonding and poor wear resistance. It has an excellent application prospect