油酸修饰纳米铜粉的摩擦学性能研究

采用了液相还原修饰法,在溶液中直接合成了油酸表面修饰的纳米Cu微粒。在四球摩擦擦损试验机上考察了其作为润滑油添加剂在45#变压器油中的摩擦学性能。结果表明:制备的纳米Cu微粒粒径在20~50 nm之间,且分布均匀;较低载荷下,纳米Cu微粒对油品的润滑性能没有影响,当载荷达到600 N以上时,其抗磨减摩性能有显著的提高。XPS分析表明,较高载荷下的摩擦表面形成了单质铜和油酸的沉积膜,正是这层沉积膜的作用使得纳米Cu微粒具有优异的抗磨减摩性能。

Investigation on Tribological Performance of Nanon Cu Powder Modified by Olelic Acid

Nanometer Cu modified by olelic acid were prepared in solution by means of a redox surface modification technique,and the tribological performance of the nanoparticals was studied by four-ball tribotester as additive in 45# transformer oil.The result shows that the diameters of the Cu nanoparticals is relative uniformity within the range between 20 nm to 50 nm.Under the lower load the additive has less effect on the anti-wear and friction-reduction ability of 45# transformer oil,but with the load higher than 600 N,the anti-wear and friction-reduction ability of the transformer oil is increased remarkably.XPS analysis shows both the olelic acid and the Cu can form a deposit film on the worn surface,which improves the anti-wear and friction-reduction performance of transformer oil.