聚α⁃烯烃是应用十分广泛的润滑剂产品，在保证使用性能前提下提高其生物降解性具有十分重要的现实意义。选择前期实验中对矿物基础油生物降解性具有较大促进作用的月桂酸二乙醇酰胺作为生物降解促进剂，考察其对聚α⁃烯烃PAO 40生物降解性、抗磨减摩性、抗氧化安定性及黏度指数的影响。实验结果表明：月桂酸二乙醇酰胺既能有效促进PAO 40生物降解，也能一定程度上改善PAO 40的抗磨减摩性能，但对其抗氧化安定性及黏度指数影响不大。作为生物降解促进剂，月桂酸二乙醇酰胺在保证聚α⁃烯烃使用性能的基础上能有效提高后者的生物降解性，具有较大的实用价值。%As lubricant products,poly⁃α⁃olefins(PAO)are widely used in various fields. Therefore,it has a very important practical significance to improve their biodegradability in the premise of guarantee of their useful performances. This paper selects lauric di⁃ethanolamide(LDEA)which can obviously accelerate the biodegradation velocity of mineral base oils as biodegradation enhancer. The impact of LDEA on biodegradability and related physico⁃chemical properties such as lubricity,viscosity index and oxidation stability of PAO 40 is examined. The results indicate that LDEA not only effectively enhances the biodegradability,but also improves the friction⁃reducing ability of PAO 40 to some extent while the viscosity index and oxidation stability are almost unaffected. LDEA is an ideal biodegradation enhancer for poly⁃α⁃olefin,it can effectively improve the biodegradability of PAO on the basis of guarantee of the using performance,and has great practical value.
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