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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。
The RC2540-MF resin microcapsules were synthesized by the in-situ polymerization using the vulcanized aliphatic diol pentasulfide (RC2540) as core material and melamine-formaldehyde resin (MF resin) as the wall materials. Its properties were characterized by infrared spectroscopy, SEM and thermogravimetric analysis (TG). The friction and wear properties of RC2540-MF resin microcapsules as additive of polyethylene glycol base fluid were investigated by four-ball friction pairs. The results showed that the friction coefficient of the polyethylene glycol base fluid with 3% RC2540-MF resin microcapsules added at 314N could be as low as 0.04 and the diameter of the burr spots was 0.54mm at 314N (RC2540-MF mass fraction 5%). Experimental load can be increased to more than 1000N. This is due to the friction caused by RC2540-MF resin microcapsules damage, the active sulfide in the friction surface of the physical, chemical adsorption and friction chemical reaction film to play the role of anti-friction and extreme pressure anti-wear effect.