摘要
为研究固体润滑剂软金属Sn作为润滑添加剂的摩擦学性能,采用原位表面修饰液相化学还原的方法制备了硬脂酸修饰Sn纳米微粒。通过XRD,TEM,FT-IR等分析手段对其形貌和结构进行了表征,在四球摩擦磨损试验机上考察了硬脂酸修饰Sn纳米微粒作为液体石蜡添加剂在不同添加量和不同施加载荷下的摩擦学性能。结果表明,所制备的纳米微粒具有四方晶型Sn的晶体结构,粒径细小,平均粒径5-10 nm,有机修饰层的存在能防止Sn纳米微粒被氧化。硬脂酸修饰Sn纳米微粒在中低负荷下作为润滑油添加剂具有良好的减摩抗磨性能,并且能够提高基础油液体石蜡的承载力。
Stearate modified Sn（Sn-St） nanoparticles were prepared through chemical reduction method in aqueous solutions,the morphology and structure of as-prepared nanoparticles were characterized by XRD,TEM,FT-IR,etc.The tribological properties of stearate modified Sn nanoparticles using as oil additives in liquid paraffin were evaluated on a four-ball test machine.The results show that the surface coated Sn nanoparticles have an average diameter of 5～10 nanometer,and exhibit good antiwear and friction-reduction properties as oil additives at low-middle loads.It also can improve the load carrying capacity of the base oil.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第11期45-47,156,共4页
Lubrication Engineering
基金
国家重点基础研究发展计划(973)课题资助项目(2007CB607606)
关键词
Sn纳米微粒
表面修饰
摩擦学性能
Sn nanoparticles
surface modification
tribological properties
