不同长度CF/PEEK复合材料润湿性及摩擦学性能研究

Study on wettability and tribological properties of PEEK composite reinforced by CF with different lengths

以短切碳纤维为填料,采用注塑法分别制备长、短碳纤维/聚醚醚酮(CF/PEEK)复合材料;通过测量复合材料的水接触角探究其表面润湿性;通过摩擦磨损实验研究其摩擦学性能。结果表明,加入碳纤维后,复合材料表面接触角增大,纤维越长,接触角越大;CF/PEEK的摩擦系数及摩擦量均低于纯PEEK,长纤维CF/PEEK比短纤维CF/PEEK的摩擦系数和磨损量更低。说明碳纤维能起到减摩润滑的作用,使CF/PEEK复合材料的摩擦系数降低,碳纤维的长度也会影响复合材料的摩擦学性能,长纤维复合材料具有更好的耐摩擦性能.

With chopped carbon fiber(CF)as filler,long and short CF/polyetheretherketone(CF/PEEK)composite materials were prepared by injection molding method.The surface wettability of the materials was Explored by measuring the water contact angle.The tribological properties were studied through friction and wear experiments.The results shown that after adding CF,the surface contact angle of the materials increased,and the longer the fiber,the larger the contact angle.The friction coefficient and friction amount of CF/PEEK were lower than pure PEEK,and the friction coefficient and wear amount of long fiber CF/PEEK were lower than that of short fiber CF/PEEK.It shown that CF can play the role of anti-friction and lubrication,so that the friction coefficient of CF/PEEK was reduced.The length of CF will also affect the tribological performance.Long fiber materials had better friction resistance performance.