Abstract: Borate esters were prepared as anti-wear lubricants additives from stearic acid, diethanolamine and boric acid and characterized by infrared spectroscopy. Their optimum preparation conditions were determined by examining molecular ratio of reactants, amount of sodium hydroxide[KG*3]and[KG*3]so[KG*3]on.[KG*3]The[KG*3]experimental[KG*3]results[KG*3]show[KG*2]that[KG*2]the[KG*2]yield[KG*2]of[KG*2]borate[KG*2]esters[KG*2]can[KG*2]reach 43.33% under the optimum conditions: mole ratio of stearic acid, diethanolamine to boric acid 1.0∶1.1∶1.0, reaction temperature 105~110 ℃, reaction time 11 h. At the meanwhile, the effect of adding amount of lubricant additives on anti-wear performance of the lubricant base oil agents was also studied and find that when the mass fraction of nitrogen-containing borate ester 0.25% was adding in the liquid paraffin, PB value can reach 697.9 N, minimum wear scar diameter is 0.49 mm, the friction coefficient reduces by 0.017 as compared with that of liquid paraffin oil.

Key words: Extreme-pressure anti-wear performance , Borate ester , Nitrogen-containing

摘要： 　    以硬脂酸、乙醇胺以及硼酸为原料制备了一种可用作润滑油抗磨添加剂的含氮硼酸酯。通过考察反应物三种原料物质的量比，以及氢氧化钠的加入等因素对产物收率的影响，确定了制备的最佳条件，考察了其作为润滑油基础油抗磨剂时添加量对抗磨性的影响，并利用红外光谱对合成的硼酸酯进行了表征。实验结果表明：当ｎ（硬脂酸）∶ｎ（二乙醇胺）∶ｎ（硼酸）＝１．０∶１．１∶１．０、反应温度为１０５～１１０℃、反应时间为１１ｈ时，反应收率达到４３．３３％；当含氮硼酸酯在液体石蜡中的质量分数为０．２５％时，ＰＢ（润滑油的承载力）达到最大值６９７．９Ｎ，磨斑直径达最小值０．４９ｍｍ，摩擦系数较液体石蜡油的摩擦系数减小了０．０１７。

关键词: 极压抗磨 , 硼酸酯 ,  , 含氮硼酸酯