油胺修饰镍纳米粒子在锂基脂中的摩擦学性能  

Tribological Properties of Nickel Nanoparticles Modified by Oleylamine in Lithium Grease

作　　者：张红[1,2] 胡文敬 李久盛[2] 韩生[3] ZHANG Hong;HU Wenjing;LI Jiusheng;HAN Sheng(School of Chemistry and Chemical Engineering,Shanghai University of Engineering Science,Shanghai 200335,China;Laboratory for Advanced Lubricating Materials,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China;School of Chemistry and Environmental Engineering,Shanghai Institute of Technology,Shanghai 200235,China)

机构地区：[1]上海工程技术大学化学化工学院,上海200335 [2]中国科学院上海高等研究院先进润滑材料实验室,上海201210 [3]上海应用技术大学化学与环境工程学院,上海200235

出　　处：《润滑与密封》2022年第8期67-74,共8页Lubrication Engineering

基　　金：中国科学院战略性先导科技专项(XDA21021202);中国科学院青年创新促进会项目(2019288);上海浦东新区科技发展基金项目(PKJ2019-C01)。

摘　　要：为提高镍纳米粒子作为润滑脂添加剂的减摩和抗磨能力,采用油胺对其进行修饰以减少团聚,通过SEM、FT-IR和XRD对OA-Ni的微观形态和结构进行了表征,利用四球摩擦试验机和TE77往复摩擦试验机考察表面修饰的镍纳米粒子(OA-Ni)对锂基润滑脂摩擦学性能的影响,并探讨其在润滑脂中的减摩抗磨机制。结果表明:制备的油胺修饰镍纳米粒子呈不规则的圆片状,粒径约为100 nm,在润滑脂中有良好的分散性;经油胺表面改性的镍纳米粒子能有效改善锂基脂的摩擦学性能,抗磨和减摩性能分别提升了36.6%和15%。磨损表面分析结果表明,在摩擦过程中油胺修饰的镍纳米粒子在摩擦表面形成了主要成分为Fe_(2)O_(3)、Fe_(3)O_(4)、NiO、Ni_(2)O_(3)等金属氧化物的摩擦化学膜,提高了锂基脂的摩擦学性能。In order to improve the friction reducing and anti-wear ability of nickel nanoparticles as lithium grease additives,nickel nanoparticles were modified by oleylamine(OA)to reduce polymerization.The effects of as-prepared OA-Ni nanoparticles on the tribological properties were tested by four-ball and TE77 reciprocating friction testing machines,and the mechanism of friction reducing and antiwear of OA-Ni nanoparticles in grease was discussed.The as-prepared OA-Ni nanoparticles are irregular discs with a particle size of about 100 nm,which have good dispersion in grease.OA-Ni nanoparticles can effectively improve the tribological properties of lithium grease,and the anti-wear and friction reducing properties are increased by 36.6% and 15%,respectively.The results of wear surface analysis show that during the friction process,OA-Ni nanoparticles can form a tribochemical film with metal oxides such as Fe_(2)O_(3),Fe_(3)O_(4),NiO and Ni_(2)O_(3) on the friction surface,which improves the tribological properties of lithium grease.

关 键 词：锂基脂 镍纳米粒子 表面改性 摩擦学性能 

分 类 号：TH117.2[机械工程—机械设计及理论]