磷酸三丁酯和磷酸三苯酯作为菜籽油添加剂的摩擦学特性

TRIBOLOGICAL BEHAVIORS OF TRIBUTYL PHOSPHATE AND TRIPHENYL PHOSPHATE ADDITIVES ON THE RAPESEED OIL

利用四球机考察了磷酸三丁酯(TBP)和磷酸三苯酯(TPP)作为菜籽油添加剂在不同条件下的摩擦学性能,研究了承载能力和抗磨性与添加剂含量之间的关系,探讨了TBP和TPP在不同负荷下的抗磨作用机理。结果表明,TBP和TPP能明显改善菜籽油的抗磨性,有效提高菜籽油承载能力;相同试验条件下,特别是高负荷的情况,TPP的抗磨性能优于TBP;TBP和TPP的质量分数分别为1.5%和1.0%时,菜籽油的抗磨性最好;其作用机理是由于长链植物油分子的载体作用、添加剂中磷的高反应活性及其和植物油分子的协同作用,低负荷工况下在摩擦金属表面形成一层高强度的吸附膜;高负荷工况下形成摩擦化学反应膜。

The tribological behaviors of the rapeseed oil with additives of tributyl phosphate (TBP) and triphenyl phosphate (TPP) were tested in the four-ball machine, the relationship between the load-carrying capacity, anti-wear ability and the content of additives were analyzed, and the anti-wear mechanism of TBP and TPP under loads was proposed. The test results show that TBP and TPP improve anti-wear ability of the rapeseed oil and increase the load-carrying capacity of the rapeseed oil. Under the same test conditions, especially under high load conditions, TPP shows better anti-wear property than TBP. When the mass content of TBP and TPP were 1.5% and 1.0%, respectively, the anti-wear ability of the rapeseed oil were at the maximum. The molecules of the rapeseed oil base-stock with a long carbon chain helped strengthen the adsorption of the additive molecules on the steel surface, which together with the high reaction activity of phosphorus in the additive molecules showed a synergism. A high strength adsorption film was formed under low load working conditions, while under high load working conditions, a tribological chemical reaction film was formed on the steel surface.