高硅氧纤维增强酚醛树脂复合材料的制备及性能研究

Preparation and Properties Research of High Silica Fiber Reinforced Phenolic Resin Composite

采用酚醛树脂(PR)浸渍高硅氧纤维(QF)并调控浸渍用树脂浓度,制备了不同树脂浓度的PR/QF复合材料,并对其力学及热学性能进行表征。结果表明:随着PR浓度的提高,复合材料的热稳定性、残碳率均有提高;当浸渍用PR浓度为30%时,热导率达到相对较低值;随着PR浓度的增加,PR/QF复合材料弯曲强度和弯曲模量逐渐增大。PR/QF-3复合材料具有较好的力学性能及较低的热导率,可满足高铁刹车片的性能要求。

Phenolic resin(PR) was used to impregnate high silica fiber(QF) and the resin concentration used for impregnation was adjusted to prepare PR/QF composites with different resin concentrations, and their mechanical and thermal properties were characterized. The results showed that with the increase of PR concentration, the thermal stability and residual carbon rate of the composite material increased;when the PR concentration for impregnation was 30%, the thermal conductivity reached a relatively low value;with the increase of PR concentration, the flexural strength and flexural modulus of PR/QF composites gradually increased. PR/QF-3 composite material has better mechanical properties and lower thermal conductivity, which can meet the performance requirements of high-speed rail brake pads.