Four novel stearic acid derived Schiff bases containing heterocyclic aromatic groups (furan, thiophene, pyrrole and pyridine) were synthesized in a three step reaction procedure. All the products were characterized by FT-IR, NMR and ESI-MS. The lubricity and antioxidant properties of synthesized Schiff bases were evaluated with 4-ball machine and differential scanning calorimeter. The morphologies and composition of elements on the worn surfaces were studied by using scanning electron microscope and energy-dispersive X-ray spectroscopy. Results show that these stearic acid based derivatives possess good tribological properties and antioxidant performance. The difference in the additive performance of the derivatives is closely related to the difference in their molecular structure. Pyridine containing Schiff base was more effective as both antiwear and extreme pressure additive while thiophene derivative exhibited higher efficacy as antioxidant.

在三个步骤的反应过程中，合成了四个新的硬脂酸衍生的含杂环芳族基团（呋喃，噻吩，吡咯和吡啶）的席夫碱。所有产物均通过FT-IR，NMR和ESI-MS表征。用四球机和差示扫描量热仪评估了合成的席夫碱的润滑性和抗氧化性能。使用扫描电子显微镜和能量色散X射线光谱学研究了磨损表面上元素的形态和组成。结果表明，这些基于硬脂酸的衍生物具有良好的摩擦学性能和抗氧化性能。衍生物的加和性能的差异与它们的分子结构的差异密切相关。