三羟甲基丙烷油酸酯类润滑油的抗磨损性能研究

制备了三羟甲基丙烷油酸酯 (TMPTO) 以及系列润滑油添加剂4-喹唑啉酮丙酸酯类化合物，分别将1wt.%添加剂溶解于TMPTO进行改性，利用UMT-3型微摩擦试验机评价改性润滑剂的抗磨损性能.根据摩擦学定量构效关系理论(QSTR)，运用比较分子相似性指数分析(CoMSIA) 方法构建了添加剂抗磨损性能的摩擦学三维定量构效关系 (3D-QSTR) 模型.结果表明： 4-喹唑啉酮丙酸戊酯、4-喹唑啉酮丙酸十四酯、4-喹唑啉酮丙酸十五酯以及4-喹唑啉酮丙酸十六酯的抗磨损性能较好；对于该类化合物，支链的存在可能对抗磨性能有不利的影响.利用立体场和疏水场构建的CoMSIA模型预测性能好，模型提示分子结构中的特定基团在特定区域内出现的范围增大，将会提升改性润滑油的抗磨损性能.

Study of antiwear properties of modified lubricant about trimethylolpropane trioleate

Trimethylolpropane trioleate (TMPTO) was prepared as base oil along with a series of 4-quinazolone propionate as lubricant additives. The additives were dissolved in TMPTO with a concentration of 1wt.%， respectively. The antiwear property of modified lubricants were evaluated by using a microtribometer (UMT-3). Based on the theory of quantitative structure tribo-ability relationship (QSTR)， the three-dimensional quantitative structure tribo-ability relationship (3D-QSTR) models of antiwear property about lubricant additives were established by comparative similarity indices analysis (CoMSIA) method. The results show that the antiwear properties of lubricant modified by 4-quinazolone pentyl propionate， 4-quinazolone tetradecyl propionate， 4-quinazolone pentadecyl propionate and 4-quinazolone hexadecyl propionate are good. The presence of branch carbon chain might have an adverse effect on the antiwear property for 4-quinazolone propionate. The CoMSIA models constructed by steric field and hydrophobic field have good prediction ability， which indicates that it will benefit antiwear activity if the specific molecular groups present in the particular areas.