表面修饰铁纳米颗粒的制备及其摩擦性能  

Preparation and tribological properties of surface-modified Fe nanoparticles

作　　者：麦荣顺[1] 李楠[1] 陈爽[2] 

机构地区：[1]五邑大学化学与环境工程系,广东江门529020 [2]广州大学化学化工学院,广东广州510006

出　　处：《化工学报》2009年第6期1587-1592,共6页CIESC Journal

基　　金：广东省自然科学基金项目(04011772)~~

摘　　要：以次亚磷酸钠为还原剂,双烷氧基二硫代磷酸铵盐为修饰剂,在四氢呋喃-饱和食盐水的两相体系中合成了表面修饰的铁纳米颗粒,采用红外光谱仪、热分析仪等仪器对其进行了结构表征;在透射电子显微镜下观测所制备的铁纳米颗粒的形貌;在四球摩擦试验机上测试了其摩擦性能,并在扫描电子显微镜和能谱分析仪上对钢球表面进行了形貌观测和表层成分分析。结果表明,铁纳米颗粒在低极性有机溶剂中具有良好的分散性,并具有良好的抗磨和承载能力。磨斑的表面分析表明,铁纳米颗粒添加剂在边界润滑下形成了一层含Fe、S、P和O元素的表面膜是其具有良好摩擦学性能的主要原因。Dialkyldithiophosphate （DDP） capped Fe nanoparticles were synthesized in a two-phase system of tetrahydrofuran/saturated electrolyte with NaH2PO2 as reductant and DDP as modification agent. The structure and mophologies of surface modified Fe nanoparticles were characterized by FTIR, TGA and TEM. The tribological properties were investigated by four-ball test machine, and the worn surfaces of the balls were analyzed by scanning electron microscopy and EDS. The results showed that the surface modified Fe nanoparticles exhibited excellent solubility in low polar organic solvents and good anti-wear properties. SEM result of wear scar indicated that the main reason for the tribological properties was the formation of a layer of film composed of Fe, S, P and O element.

关 键 词：表面修饰 纳米颗粒 添加剂 摩擦学性能 

分 类 号：TH117.2[机械工程—机械设计及理论]