基于正交实验的PTFE基复合材料摩擦学性能优化研究

聚四氟乙烯(PTFE)是一种优异的固体自润滑复合材料,具有广泛的工业应用。采用润滑剂:石墨(Gr),二硫化钼(MoS_2)和增强相:玻璃纤维(GF)、碳纤维(CF)等多元填料对PTFE进行复合改性。运用正交实验设计,以各填料的体积分数为正交实验设计因子,以磨损率和摩擦系数为目标因子,建立正交实验表。通过正交分析讨论了填料含量不同的PTFE复合材料的摩擦磨损特性。结果表明,影响样品摩擦系数的主次因素依次为C>MoS_2>GF>CF,影响样品磨损率主次因素依次为GF>CF>MoS_2>Gr,并根据试验结果给出了复合材料的优化配方,以期对于高性能PTFE复合材料摩擦学性能的优化设计提供一定的参考。

Optimization of the tribological properties of PTFE-based composites based on orthogonal experiments

Polytetrafluoroethylene(PTFE)is an excellent solid self-lubricant material,which has a wide range of industrial applications. In this paper,PTFE was modified with lubricants graphite (Gr),molybdenum disulfide(MoS 2 ) and reinforcements glass fiber (GF),carbon fiber (CF). The orthogonal experimental design was used to establish the orthogonal experimental table with the volume fraction of each filler as the orthogonal experimental design factor and the wear rate and friction coefficient as the objective factors. Through orthogonal analysis,the effect of different volume fraction of fillers on tribological properties of PTFE-based composites was studied. The result showed that the sequence of factors that influenced the friction coefficient of PTFE-based composites is Gr,MoS 2 ,GF and CF. The order of the factors that influenced the wear rate of samples is GF,CF,MoS 2 and Gr. The optimizing formulation was proposed according to the analysis of the experiment results,it may provide some references for the optimization design of tribological properties of high-performance PTFE composites.