多烷基环戊烷制备复合磺酸钙基润滑脂及其摩擦学性能研究

以多烷基环戊烷(MACs)为基础油制备了复合磺酸钙基润滑脂,研究了液态高分子量酚类抗氧剂(L135)、苯三唑衍生物(T551)和噻二唑类衍生物(T561)对复合磺酸钙基润滑脂性能的影响,采用热重分析(TGA)仪评价了润滑脂的热稳定性;利用往复摩擦磨损试验机(MFT-R4000)分析了L135、T551和T561在钢/钢摩擦副下对复合磺酸钙基润滑脂摩擦磨损性能的影响,利用扫描电子显微镜(SEM)和能谱仪(EDS)对磨损表面进行了分析.结果表明:以MACs为基础油制备的复合磺酸钙脂具有优良的热稳定性能;同时MACs复合磺酸钙脂与3种添加剂具有良好的相容性能,表现在MACs复合磺酸钙脂具有更好的减摩抗磨性能,其原因归结为MACs在摩擦副表面形成较为牢固的物理吸附膜和含S、N和Fe等生成的化学反应膜.

Preparation and Tribological Performances of Multiply-alkylated Cyclopentanes Calcium Sulfonate Complex Grease

Multiply-alkylated Cyclopentanes (MACs) was used as a base oil to prepare calcium sulfonate complex grease. The properties of liquid high molecular phenolic antioxidants (L135), benzotriazole derivative (T551), thiadiazole derivative (T561) in calcium sulfonate complex greases were studied on friction pair of steel disc and steel ball. The thermo-gravimetric analysis was carried out to evaluate the thermal stability of calcium sulfonate complex greases. The MFT-R4000 reciprocating friction and wear tester was utilized to evaluate the tribological properties. Scanning electron microscope and energy-dispersive X-ray spectroscopy were employed to analyze the worn surfaces and main chemical elements. The results show that calcium sulfonate complex greases prepared by MACs showed better thermal stability, and the compatibility of calcium sulfonate complex greases with additives was good because MACs calcium sulfonate complex greases showed better friction-reducing and anti-wear properties. The boundary lubricating film of MACs on the worn steel surface by physical absorption enhanced load-carrying ability of oil film and the tribo-chemical film containing S, N, Fe reduced the friction and wear.