不同添加剂在生物可降解基础油中的性能研究

研究了硫化脂肪酸酯、酚型抗氧剂在不同生物可降解基础油中的性能，包括生物可降解性、极压抗磨性、抗氧化性能。结果表明，硫化脂肪酸酯的生物可降解性高于酚型抗氧剂；硫化脂肪酸酯加入三羟甲基丙烷酯和矿物油HVI 150SN中，随油品中活性硫含量的增高，抗磨性能下降；硫化脂肪酸酯加入葵花籽油和低芥酸菜籽油中，随油品中活性硫含量的升高，抗磨性能提高；硫化脂肪酸酯加入不同的基础油中，随油品中活性硫含量的升高，油品的承载能力增强；酚型抗氧剂和含硫抗氧剂复合，可以明显提高生物可降解基础油的抗氧化性能，在不同的酚型抗氧剂中，2，6-二叔丁基对甲酚的抗氧化性能较好。

STUDY ON THE PERFORMANCE OF VARIOUS ADDITIVES IN BIODEGRADABLE BASE FLUIDS

The property of sulfurized fatty acid esters and phenol antioxidants in various biodegradable base fluids, such as biodegradability, extreme pressure anti-wear and anti-oxidation ability, was studied. The results showed that the biodegradability of sulfurized fatty acid ester was better than that of the phenol antioxidant. When adding sulfurized fatty acid esters having various active sulfur contents to biodegradable base fluids,its effect on the anti-wear property of the base fluids were varied. for instance,the anti-wear performance of sunflower oil and vegetable oil improved with the increase of active sulfur content,and reverse results were observed for trimethylolpropane ester and mineral oil HVI 150SN. It was also observed that for all the base fluid tested,their loading capability was improved with the increase of active sulfur content. The combination of phenol antioxidants and sulfur containing antioxidants could enhance the anti-oxidation performance of biodegradable base fluids significantly. Among the tested phenol antioxidants,butylated hydroxytoluene exhibited the best anti-oxidation ability.