纳米铜粉对水-乙二醇抗燃液压液摩擦学性能的影响

为提高传统水-乙二醇抗燃液的抗磨减摩性能,以乙二醇为溶剂采用原位-液相还原法制备具有高分散性的纳米铜粉,采用透射电子显微镜表征铜粉的形貌和粒径,考察不同铜粉添加量对水-乙二醇抗燃液压液摩擦学性能的影响。结果表明,原位-液相还原法所制备的纳米铜粉呈类球形,粒径为40⁵2nm,粒径分布较窄,具有良好的分散性能。纳米铜粉的加入能大幅度改善水-乙二醇抗燃液压液的摩擦性能,摩擦系数随着时间变化呈现先急剧上升后急剧下降,1 200 s后趋于平稳,纳米铜粉添加量为0.5%的抗燃液摩擦学性能最佳。

Effects of Cu nanoparticles on the tribological property of water-glycol nonflammable hydraulic fluids

In order to improve the anti-wear and anti-friction properties of traditional water-glycol nonflammable hydraulic fluids, the high-dispersion Cu nanoparticles were prepared by in-suit liquid phase reduction method in glycol. The morphology and particle size were characterized by Transmission Electron Microscopy (TEM), and the tribological properties of different Cu amounts in water-glycol nonflammable hydraulic fluids were tested by Four-ball Tester. The results indicated that the prepared Cu nanoparticles were spherelike with a narrow size distribution and excellent dispersion properties, and the particles size varied from 40 to 50 nm. The addition of Cu nanoparticles could greatly improve tribological properties of water-glycol nonflammable hydraulic fluids. The friction coefficient first increased and then decreased with the time, and changed to be steady after 1200 s. The water-glycol nonflammable hydraulic fluids with 0.5 wt.% Cu nanoparticles achieved the best tribological properties.