采用模压-滤取和高温真空熔渍工艺制备了多孔聚醚醚酮（PEEK）发汗式自润滑材料,并分别考察了成型压力、造孔剂含量和润滑油脂种类对PEEK多孔自润滑材料的摩擦磨损性能的影响。结果表明,压力为100MPa,NaCl的质量分数为30%,采用通用锂基脂时,所得多孔PEEK自润滑材料的磨损率最低,200N下磨损率为2.73×10^-16m^3/（N.m）,与纯PEEK干摩擦相比耐磨性提高了1245倍,其耐磨性较经典的炭纤维增强PEEK复合材料还提高了32倍。研究表明,多孔结构能够储存润滑油,在摩擦过程中能通过发汗作用在对偶面上形成稳定连续的油膜而起到良好的润滑作用,从而大幅降低复合材料的摩擦系数和磨损率。
Self-lubricating polyetheretherketone（PEEK） with sweat-gland pore structure were prepared by mold-leaching and impregnating grease or oil under high temperature and vacuum conditions.The tribological behaviors were investigated under different stress,NaCl contents and lubricating greases.The results indicate the optimal pressure and mass fraction of NaCl are 100MPa and 30%,respectively.The lowest wear rate is obtained when the PEEK is impregnated with lithium-base grease,which is 2.73×10^-16 m^3/（N·m） with the load of 200N.At this time,the wear resistance increases by 1245 times compared with that of pure PEEK under the dry condition.Moreover,it is enhanced by 32 times compared with that of classical carbon fiber（CF） reinforced PEEK composites.It is found that pores in PEEK composites can reserve lubricated grease.The porous self-lubricating PEEK materials can form steady and continuous oil lubricating layer on the counterface,so that the friction coefficient and wear rate decrease effectively.
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