Preparation and Properties of N-oleoylglutamic Acid as Environment-friendly Lubricating Additive

N-oleoylglutamic acid was prepared by reactions of glutamic acid with chlorides in alkali solution,and its structure was characterized by means of IR.The tribological behavior of the prepared N-oleoylglutamic acid as lubricating additive for mineral oil was examined using a four-ball friction tester,and the effect of N-oleoylglutamic acid as a new lubricationg additive on biodegradation of HVI350 mineral base oil was studied.The results show that PB increased 27.2% and PD increased 26.9% with the existence of N-oleoylglutamic acid.The additive accelarated the degradation of HVI350 mineral base oil greatly and improved the anti-wear and friction-reducing abilities of HVI350 mineral base oil.