纳米硼酸铜的表征与在水介质中的摩擦学性能

CHARACTERIZATION OF COPPER BORATE NANO-PARTICLES AND THEIR TRIBOLOGICAL PROPERTIES IN AQUEOUS SOLUTION

采用透射电子显微镜（TEM）、X射线衍射（XRD）和红外光谱（IR）法对油酸钠修饰硼酸铜纳米颗粒的形貌、物相和表面结构进行了表征，制备的硼酸铜纳米粒子粒径为60～90nm，并能在水中均匀分散。用四球试验机考察了硼酸铜纳米粒子在水介质中的摩擦学性能及用扫描电子显微镜（SEM）观察了磨斑表面形貌。结果表明，添加质量分数为0．1％～2．5％的油酸钠修饰硼酸铜纳米粒子，可使水的承载能力显著提高，抗磨减摩性能也有较大提高。用X射线光电子能谱（XPS）分析了蚀球磨斑表面的化学成分，在摩擦副表面检测出Cu，B，Fe等的氧化物，硼酸铜纳米粒子沉积在摩擦表面上以及生成的氧化物保护膜起良好的抗磨减摩作用。

The morphology, phase and surface structure of copper borate nano particles modified by sodium oleate were characterized by means of transmission electron microscopy（TEM）, X ray diffraction（XRI）） and infrared spectroscopy（IR）. Said nano particles having particle sizes in the range of 60-90nm could be stably dispersed in aqueous solution. Their tribological properties in aqueous solution were tested by four ball test device,and the worn surfaces of the steel ball were analyzed by means of scanning electron microscopy（SEM）. It was found that load-carrying capacity of water could be significantly improved when 0.1%-2.5% said nano-partictes was added, as welt as anti-wear and friction reduction properties. Elemental composition of the rubbing surface was determined by X-ray photoelectron spectroscopy（XPS）. The results showed that copper trioxide, boron trioxide and iron oxide were found on the rubbing surface, indicating copper borate nano-particles played an important role in anti-wear and friction reducing.