中文摘要：

以硫化脂肪类添加剂二烃基五硫化物（RC2540）为芯材,三聚氰胺-甲醛树脂（MF树脂）为壁材,采用原位聚合法合成了RC2540-MF树脂微胶囊。使用红外光谱、SEM及热重分析（TG）等对其性能进行表征。用四球摩擦副考察了RC2540-MF树脂微胶囊作为聚乙二醇基础液添加剂时的摩擦磨损性能。结果表明：添加质量分数3%RC2540-MF树脂微胶囊的聚乙二醇基础液在314N下摩擦系数可低至0.04,磨斑直径在314N（RC2540-MF质量分数5%）下为0.54mm,实验载荷则可以提高至1000N以上。这是由于摩擦力导致RC2540-MF树脂微胶囊破损,活性硫化物在摩擦表面的物理、化学吸附作用和生成的摩擦化学反应膜起到减摩和极压抗磨作用。

英文摘要：

Pentasulfid bis（2,2,4-trimethyl） pentyl（RC2540）-melamine-formaldehyde resin microcapsules was synthesized by in-situ polymerization method with sulfureted fatty additive RC2540 as core materials and melamine-formaldehyde resin（MF resin） as shell materials.FTIR,thermo-gravimetric analysis and SEM measurements were used to characterize these microcapsules.The friction and wear properties of RC2540-MF resin microcapsules were investigated with four-ball testing machine using polyethyleneglycol as base fluid.The experimental results reveal that the friction coefficient can be as low as 0.04 under the lubrication of the base oil with 3% mass fraction of RC2540-MF resin microcapsules in 314 N load,the wear diameter under 314 N load（with 5% mass fraction of RC2540-MF resin microcapsules） is 0.54 mm,the experimental load can be increased to 1000 N above.The effect of RC2540-MF resin microcapsules in reducing friction and wear may be attributed to the physical and chemical adsorption on the friction surface,and to the tribochemical reaction film by active sulfides released from broken RC2540-MF resin microcapsules,leading to anti-friction,good extreme pressure and anti-wear property.