纳米Sn粒子的制备及其作润滑油添加剂的摩擦学性能研究

用化学还原法制备了表面经油酸修饰的纳米Sn粒子,并在透射电镜(TEM)下观测到所制备的纳米Sn粒子呈球形、平均粒径为20 nm。在MSR-10D四球摩擦磨损试验机上考察了纳米Sn粒子作为CF-4 15W/40润滑油添加剂的摩擦学性能,并在扫描电子显微镜(SEM)和能谱分析仪(EDS)上对钢球磨斑表面进行了形貌观测和表层成分分析。试验结果表明,纳米Sn粒子作为润滑油添加剂具有一定的减摩性能和较好的抗磨性能,当所添加的体积分数仅为0.1%时,添加纳米Sn粒子润滑油的摩擦力比基础油降低了16.64%,其磨斑直径比基础油减小了38.4%。分析认为,纳米Sn粒子通过隔离摩擦表面而改善了润滑油的减摩抗磨性能。

Preparation and Tribological Properties of Sn Nanoparticles as Oil Additives

OA modified Sn nanoparticles were synthesized by chemical method using NaBH4 as reduing agent.Investigated by TEM method,Sn nanoparticles are round particles,about 20 nm in dimensions.A MSR-10D four-ball equipment was used to investigate the tribological properties of Sn nanoparticles used as additives in base oil CF-4 15W/40.The worn surfaces of the balls were analyzed by scanning electron microscopy(SEM) and EDS.As a result,Sn nanoparticles as an additive increase the antiwear ability and friction reducing properties of base oil CF-4 15W/40.The friction is reduced by16.64%,and the wear scar diameters are reduced by 38.4%,when 0.1% volumes of Sn namopartlcles were added.The analysis by the SEM and EDS methods indicates that Sn particles could separate the worn surfaces,thus reduce friction and wear scar diameters.