摘要
制备了硬脂酸修饰的复合SiO2-Zn(OH)2微粒,采用四球摩擦磨损试验机考察了其作为润滑油添加剂的摩擦学特性,并用扫描电子显微镜、红外光谱仪和X射线光电子能谱仪对微粒结构和磨损表面进行了表面分析.结果表明:该复合微粒粒径均匀一致;表面修饰剂硬脂酸与复合微粒之间存在化学键;复合微粒中Zn(OH)2和SiO2之间发生了相互作用,从而使Zn原子的结合能增大;添加0.125%表面修饰SiO2-Zn(OH)2在较低载荷下即可显著提高润滑油的抗磨损性能.
SiO2-Zn（OH）2 complex particles modified by stearic acid were prepared by means of parallel flow precipitation process, and their tribological properties as additives in lubricant were studied with four-ball machine. The morphologies of the complex particles were examined by scanning electron microscope （SEM） and Fourier transformation infrared spectrometry （FTIR）. The elemental distributions of the worn steel surface were analyzed with X-ray photoelectron spectrometry （XPS）. The results showed that the complex particles were relatively uniform, and there was chemical reaction between SiO2-Zn（OH）2 and surface-modifier. The XPS analysis proved that an interaction between SiO2 and Zn（OH）2 increased the binding energy of Zn . The complex particles with 0.125 % surface modified SiO2-Zn（ OH）2 took a great improvement on the anti-wear ability of the lubricant under lower load.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2008年第1期119-122,共4页
Journal of Tianjin University(Science and Technology)
关键词
复合微粒
表面分析
摩擦学性能
complex particle
surface analysis
tribological property
