摘要
采用乳液法在水甲苯体系中原位合成了含硫、氮有机物修饰的铜纳米微粒,用透射电镜(TEM),红外光谱(FTIR)表征了纳米颗粒的尺寸、形貌和结构,在四球摩擦磨损试验机上考察了纳米铜添加剂在石蜡基础油中的抗磨减磨性能,最后分别采用扫描电子显微镜(SEM)和X光电子能谱仪(XPS)分析了磨斑的表面形貌及其化学组成。结果表明:铜纳米微粒添加剂能够显著提高基础油的极压性能,同时具有良好的抗磨性能;发现在摩擦过程中铜纳米微粒在表面形成沉积膜,这种沉积膜与表面修饰层形成的摩擦化学反应膜产生协同作用,从而表现出优良的极压抗磨性。
The Cu nanoparticles surface coated with S-hexyl N, N-lihydroxyethyl dithiocarbamate （SHNDD） were synthesized by the controlled reduction of aqueous copper salts using the modified Brust synthesis. The size, morphology and structure of the Cu nanoparticles （coded as SHNDD-Cu） were characterized using TEM, ED and FTIR. The tribological behaviors of SHNDD-Cu as additive in liquid paraffin were evaluated on a four-ball machine. The results show that Cu nanoparticles as oil additive can improve the load-carrying capacity and anti-wear property of the base oil. The rubbed surfaces were investigated by SEM and XPS. It can be found that a tribological reaction film composed of Cu nanoparticles and surface modifying film was formed, which contributed to the good tribological properties of surface modified Cu nanoparticles.
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2009年第3期62-66,共5页
China Surface Engineering
关键词
纳米铜
制备
摩擦学性能
copper nanoparticles
synthesis
tribological properties
