二异辛基二硫代磷酸酯季铵盐离子液体在基础油中的摩擦学研究  

Tribological Properties of a Quaternary Ammonium Salt of Di( isooctyl) dithiophosphate as Lubricant Additive in Base Oils

作　　者：钟寅杰 李志鹏[1] 任天辉[1] 

机构地区：[1]上海交通大学化学化工学院薄膜与微细技术教育部重点实验室,上海200040 [2]中国科学研究院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《润滑与密封》2016年第7期25-32,共8页Lubrication Engineering

基　　金：中科院兰州化学物理研究所固体润滑国家重点实验室开放课题(1205)

摘　　要：合成二异辛基二硫代磷酸酯季铵盐离子液体的极压抗磨剂MDAPD;利用四球摩擦磨损试验机考察其在合成油(PAO)、矿物油(5CST)及菜籽油(RSO)中的摩擦磨损性能,测定其抗腐蚀性及低温流动性;使用SEM观察磨斑的表面形貌并使用XPS分析摩擦膜的化学组成,并初步探究摩擦学机制。研究结果表明:MDAPD具有良好的低温流动性、热稳定性和抗腐蚀性,在菜籽油和合成油中具有较好的抗磨性能;添加剂在摩擦过程中发生化学反应,主要生成了由Fe SO_4、Fe_2(SO_4)_3、Fe S、Fe S2和Fe PO_4组成的边界润滑膜,从而提高了基础油的抗磨性能。A quaternary ammonium salt of isooctyl-thiophosphate（ MDAPD） was synthesized. The tribological properties of MDAPD in three different base oils（ synthetic oil,rapeseed oil,mineral oil） were evaluated by four-ball tester,and its fluidity,thermal stability and corrosivity were also measured. The worn surface morphology and chemical composition were analyzed by SEM and XPS separately. The results indicate that the synthesized MDAPD has good thermal stability,excellent fluidity at low temperature and good corrosion resistance in these base oils. MDAPD has good wear resistance in synthetic and rapeseed oil. The surface analysis reveals that the formation of Fe SO4,Fe2（ SO4）3,Fe S,Fe S2 and Fe PO4 in the boundary film enhances anti-wear properties of the base oil.

关 键 词：有机S-P添加剂 离子液体 摩擦学性能 表面分析 

分 类 号：TH117.2[机械工程—机械设计及理论]