纳米碳酸钙胶核硼化改性对高碱值磺酸钙清净剂摩擦学性能的影响  

Effect of Borated Nanometer Calcium Carbonate Colloidal Nucleus on the Tribology Performance of Overbased Calcium Sulfonate Detergent

作　　者：赵勤[1,2] 赵改青[1] 王晓波[1] 刘维民[1] 

机构地区：[1]中国科学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 [2]中国科学院大学,北京100049

出　　处：《摩擦学学报》2013年第5期530-536,共7页Tribology

基　　金：国家重点基础研究发展计划973计划项目(2011CB706603)资助~~

摘　　要：将高碱值磺酸钙清净剂(TBN>400)进行硼化反应改性处理并用红外光谱仪对其胶核成分进行了对比表征,同时利用热分析仪对比了硼化改性处理前后磺酸钙清净剂的热稳定性.采用SRV摩擦磨损试验机和四球摩擦磨损试验机分别考察了高碱值磺酸钙以及硼化改性高碱值磺酸钙清净剂作为复合锂基润滑脂添加剂对钢-钢摩擦副摩擦学性能的影响.利用扫描电子显微镜(SEM)及光电子能谱(XPS)对磨损表面进行了分析.结果表明:高碱值磺酸钙以及硼化改性高碱值磺酸钙清净剂均能显著提高复合锂基润滑脂的减摩抗磨能力;复合锂基润滑脂分别含有高碱值磺酸盐以及硼化改性高碱值磺酸盐清净剂润滑下的钢块磨损形貌及表面润滑膜组成存在明显差异,这种差异决定了硼化改性高碱值磺酸盐清净剂作为复合锂基润滑脂添加剂表现出更为优异的极压抗磨性能.Borated overbased calcium sulfonate detergent was obtained in a way which nanometer calcium carbonate colloidal nucleuses were replaced by calcium borate and the colloid composite in comparison with overbased calcium sulfonate detergent were characterized by Fourier transform infrared analysis. Thermal stability tests in comparison were also conducted with a thermo - gravimetric analyzer. The tribology performance of overbased calcium sulfonate detergent and borated overbased calcium sulfonate detergent as additives in lithium complex grease were evaluated on an optimol SRV oscillating reciprocating friction tester and a fourball tester in details. The surface topography and chemical composition of wore surface after friction tests were investigated by scanning electron microscope （ SEM ） and X - ray photoelectron spectroscopy （XPS）. The results demonstrate that both overbased calcium sulfonate and borated overbased calcium sulfonate detergent improved the extreme pressure, friction - reducing, and anti - wear properties of the base lithium complex grease. In addition, the data show that the borated overbased calcium sulfonate detergent as additive in base lithium complex grease exhibited better anti-wear and extreme pressure properties than overbased calcium sulfonate detergent. This results were ascribed to the different boundary lubricant films formed on worn surface according the SEM and XPS analysis.

关 键 词：复合锂基润滑脂 高碱值磺酸钙 清净剂 硼化高碱值磺酸钙 摩擦学 

分 类 号：TH117.3[机械工程—机械设计及理论]