N-酰基谷氨酸在矿物油中的摩擦学性能研究

分别在油酸和月桂酸分子中引入氮,合成了2种新型的含氮润滑油添加剂——N-油酰基谷氨酸和N-月桂酰基谷氨酸。利用四球摩擦磨损试验机考察了2种添加剂作为HVI350矿物基础油极压抗磨添加剂时的摩擦学性能,通过测定不同条件下的最大无卡咬负荷和磨斑直径及摩擦因数,分析和研究了载荷、摩擦时间、添加剂含量对矿物油最大无卡咬负荷和磨斑直径及摩擦因数的影响。试验结果表明:2种添加剂均可以明显提高基础油的承载能力和抗磨减摩性能,添加剂N-油酰基谷氨酸在矿物油中的承载能力明显优于N-月桂酰基谷氨酸,而N-月桂酰基谷氨酸对提高矿物基础油抗磨减摩性能的效果好于添加剂N-油酰基谷氨酸。试验还表明添加剂的含量并非越高越好,否则磨斑直径将增大。

Study on Tribological Properties of N-Acylglutamic Acid in Mineral Base Oil

Two new types of nitrogen modified fatty acids,N-oleoylglutamic acid and N-lauryl glutatamic acid as lubricant additive were prepared,the tribological properties of them in HVI350 mineral base oil were tested with a four-ball testing machine.Through measuring maximum no-seizer load,wear scar diameter and friction coefficients in different conditions,the effects of load,tribological time and the content of additives on the tribological properties of mineral oil were studied.The experimental results show that both N-oleoylglutamic acid and N-lauryl glutatamic acid as extreme pressure and anti-wear additives in mineral oil can increase the load-carrying capacity and anti-wear ability of the mineral oil,but N-oleoylglutamic acid is inconspicuous in improving the load-carrying capacity of the mineral oil and N-lauryl glutatamic acid can obviously increase the anti-wear and reducing friction abilities of the oil.The use of the additives must be in reason,or the wear scar diameter will increase.