摘要
采用盘-销式摩擦试验机,以司班-80/二聚酸体系作润滑油添加剂,在陶瓷-陶瓷(A l2O3-A l2O3)表面进行摩擦磨损实验。采用差示扫描量热法(DSC)探讨了单体在陶瓷表面的吸附类型;采用扫描电子显微镜(SEM)、X射线光电子能谱仪(XPS)、傅立叶红外光谱仪(IR)对盘上磨痕进行表面分析。结果表明添加剂在磨痕处生成了保护性体型聚酯膜。其摩擦聚合机制为:在摩擦过程中,二聚酸以物理吸附的方式吸附在陶瓷表面;由于二聚酸的羧基与司班-80的羟基发生摩擦聚合反应,在陶瓷表面生成体型聚酯膜,从而降低陶瓷表面的磨损。
The tribological tests were carried out in a pin-on-disk tester by using span-80/dimer acid as the lubricant additives to lubricate the surface of ceramic-on-ceramic under boundary lubricant condition. The monomer absorption was studied by differential scanning calorimetry（ DSC ）. The surface of the wear scar was analyzed by scanning electron microscopy（ SEM）, X-ray photoelectron spectroscopy （XPS） and fourier infrared spectroscopy （IR）. The result indicate that the additives can generate protective polyester on the surface of alumina. A mechanism of reducing wear on ceramic - on - ceramic interface can be deduced ：firstly, the dimer acid was absorbed physically on the surface of the ceramic;secondly, a crosslinked film of polyester was generated on the surface of ceramic by the tribopolymerization of carboxyl group of dimmer acid with hydroxy group of span-80;as a result, the polyester film obtained reduced wear of the surface of ceramic.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2006年第10期84-86,91,共4页
Lubrication Engineering
基金
国家自然科学基金项目(020374006)
关键词
摩擦聚合
司班-80
二聚酸
tribopolymerization
span-80
dimer acid ceramic
