Cu纳米纤维导热相对PPS复合涂层摩擦学性能的影响

Effect of Thermal Conductive Cu Nanofiber on Tribology Properties of PPS Composite Coating

自润滑涂层材料在使用过程中由于摩擦热聚集易导致润滑失效,有效进行摩擦热疏导是提高自润滑涂层性能延长使役寿命的关键途径。本文采用添加纳米Cu纤维导热相的方法制备热传导聚苯硫醚(PPS)自润滑复合涂层。通过考察复合涂层热传导性能和摩擦学性能,分析导热相纳米Cu纤维的添加在磨损寿命延长中起到的作用。研究发现,添加纳米Cu纤维后,复合涂层热导率显著提高,在添加量为15 wt%时,取得最大值2.514 W/(m∙K)。纳米Cu纤维/PPS复合涂层比磨损率明显降低,在添加量为10 wt%时,比磨损率最低为1.44 g∙N−1∙M−1,比未添加纳米Cu纤维导热相的复合涂层比磨损率降低约40%。从而起到延长磨损寿命的作用。

In order to solve the failure induced by aggregation of friction heat, heat conductive self-lubricating polymer coatings are fabricated by filling of Cu nanofiber. The heat conductive net chains formed in the coating can accelerate the spread and transmission of friction heat. The process of friction and wear is investigated to reveal the effect of heat conductivity on the mechanism of life extension. The thermal conductivity of the Cu nanofiber/PPS composite coating increased to 2.514 W/(m∙K), when the weight ratio of Cu nanofiber was 15 wt%. The wear rate of the composite coating decreased to 1.44 g∙N−1∙M−1, due to the heat conductive net chains formed in the coating. The effect of heat conductivity is the key of life extension of the Cu nanofiber/PPS composite coating.