摘要
利用正交实验法研究了氧基二硫代磷酸(DDP-18)的最佳合成条件:以C18醇及P2S5为原料,在起始温度90℃,反应温度120℃,P2S5用量超出理论用量的10%,反应时间6h时,可以制备出硫磷酸含量接近80%的表面修饰剂二烷氧基二硫代磷酸的固体粉末.采用共沉淀表面修饰法在醇—水体系中制备了双十八烷氧基二硫代磷酸吡啶盐(PyDDP-18)表面修饰的LaF3纳米微粒,并利用红外光谱、透射电镜等手段表征其结构;作为润滑油添加剂,通过四球抗磨实验测试了其润滑性能,结果表明:表面修饰稀土氟化物纳米微粒在有机溶剂中具有良好的分散性,以其作为添加剂调制出的润滑油具有较好的减摩抗磨性能.
The optimal synthesis conditions of DDP-18 are obtained by orthogonal experiments. Using C18 and P2S5 as material, the solid powder of DDP-18 surface modifying agent can be synthesized when initial temperature is 90 ℃, reaction temperature is 120 ℃, the actual dose of P2S5 is more 10% than its theoretical dose and reaction time is 6 h, whose purity is close to 80%. The rare-earth fluoride nanoparticles whose surface is modified by DDP-18------PyDDP-18 is synthesized in water ethanol solvent. The structure of the surface-modified rare-earth fluoride nanoparticles is characterized using infrared spectrum and transmission electron microscopy. The surface-modified rare-earth fluoride nanoparticles may be used as the additive for lubricating oil. The lubricating capability of the additive is measured by four-ball antiwear test. The test results indicate that the lubricating oil additive can be well dispersed in organic solvent and has better antiwear and friction reducing capacity.
出处
《西安石油大学学报（自然科学版）》
CAS
2006年第3期83-86,共4页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
陕西省自然科学基金(编号:2004B04)
关键词
稀土氟化物
纳米粒子
表面修饰
润滑油添加剂
rare-earth fluoride
nanoparticles
surface-modified agent
lubricating oil additive
