ISSN   1004-0595

CN  62-1224/O4

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二硫化钼改性聚甲醛自润滑复合材料的微观摩擦学性能研究

Micro-Tribological Behavior of Polyacetal-Based Self-Lubrication Composite Materials Modified with MoS2

  • 摘要: 用市售微米Mos2(micro-Mos2)、自制Mos2纳米球(Mos2 nano-balls)与Mos2夹层化合物(Mos2-IC)分别共混填充到聚甲醛(POM)中,然后把此共混物复合到铜粉钢板上,制备出系列改性POM/铜/钢3层复合轴承材料。在UST?万能表面测试仪上对复合材料的微观摩擦学性能进行了测试。结果显示POM/Mos2-IC复合材料的微观摩擦学性能并不理想,主要是因为在Mos2夹层过程中,Mos2的晶型由摩擦学性能优良的2H型转变成了相对较差的1T型。POM/Mos2nano-balls复合材料表现出了优良的微观摩擦学性能,这归咎于其独特的球形封闭结构引起的化学稳定性升高,此外在摩擦过程中球形结构可以通过剥层与转移起到润滑作用。

     

    Abstract: Commercial micro-Mos2, Mos2nano-balls and polyacetal (POM)/Mos2 intercalation compound (POM/Mos2-IC) were used as fillers in polyacetal-based composites separately. The composites were selected as rubbing surface layers of self-lubrication bearing material. The micro-tribological behaviors of the composites were investigated on a Universal Surface Tester. The results showed that the intercalation of POM led to a transformation from 1T-Mos2 to 2H-Mos2, and as a consequence, the micro-tribological behavior of POM/Mos2-IC was poor. POM/Mos2nano-balls composites exhibited better micro-tribological properties than that of POM/micro-Mos2 composites. The excellent micro-tribological performance of POM/Mos2 nano-balls composites was ascribed to the good chemical stability, exfoliation and transfer of Mos2 nano-balls.

     

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