Research of Nanometer TiO₂/PF Composites and the Properties of Semi-Metallic Friction Material

Abstract

A type of phenolic resin (PF) was prepared by using TiO2 nanoparticles modified with KH-550 as composite filler and modifier, and then the composite modified PF were used as adhesive to prepare semi-metallic friction materials samples. TG analysis of the prepared nano-TiO2 /PF composites was conducted on SETARAM-TG2DSC92216 thermal analyzer that was made in France, and the friction and wear property comparison tests of the samples were carried out on XD-MSM fixed speed friction-wear machine. The results show that the heat resistance of phenolic resin after being compositely modified by TiO2 nanoparticles can be improved, carbon residue rate increases10% at 600°C；the friction coefficient of the corresponding sample slightly increases；the wear rate clearly decreases at high temperature, and wear rate decreases 10% at 350°C.

Influence on Friction Material Performance of Nano-MMT Composites of PF by <i>In Situ</i> Method

“…2) Preparation Procedure of Friction Samples:PF-0.0, PF/M-1.5, PF/M-3.0 of self-synthesized resin were separately dissolved in an appropriate amount of ethanol to form content of solid account for 33% in the three groups solution of PF/M, three groups solution of PF/M were respectively wet-mixing with raw materials of self-formulate semimetallic friction according to mass ratio of table 1, stirred them evenly, and dried them at 80℃ in the temperature control oven for 10min to remove the solvent and low molecular substances, friction samples preparation parameters such as hot pressing forming, heat treatment and machining processing can be reference to [3], which the preparation of three groups of friction samples code as shown in table 1.…”