表面修饰纳米铜粒子的制备及其摩擦学性能

Preparation and Tribological Performance of Surface-modifed Nano-copper Particle as Lubricating Oil Additive

以微乳化化学还原法制备出表面修饰纳米铜粒子,它们在基础油中显示出良好的油溶性,在苯、甲苯等有机溶剂中有良好的分散性和分散稳定性。用四球摩擦磨损试验机考察了其在26#白油中的摩擦学性能,并对其摩擦化学作用机制进行了研究。结果表明,表面修饰纳米铜添加剂具有良好的抗磨和承载能力。磨斑的表面分析表明,纳米铜添加剂在边界润滑下形成了一层厚度约为13nm含单质铜的沉积膜是其具有良好摩擦学性能的主要原因。

Surface-modified nano-copper particle was prepared through micro-emulsification chemical reduction. It shows excellent oil solubility in base stock and good disperibility in organic solvents such as benzene and toluene. The tribological performances of as lubricating oil additive in VG 26 white oil were evaluated with a four-ball friction and wear tester and their tribological mechanisms were investigated. The analytical result of wear scar indicates that the main reason that surface-modified nano-copper particles have good antiwear and carrying capacity attributes to the formation of a layer of deposited film composed by elemental copper which is nearly 13 nm thin.