蒙脱石和坡缕石纳米润滑油添加剂的摩擦学性能  

Tribological Properties of Nano-Montmorillonite and Nano-Palygorskite Lubricant Additives

作　　者：曹阳[1] 周元康[1] 吴雪梅[1] 张大斌[1] 杨绿[1] 

机构地区：[1]贵州大学机械工程学院,贵州贵阳550025

出　　处：《润滑与密封》2014年第10期22-28,共7页Lubrication Engineering

基　　金：清华大学摩擦学国家重点实验室开放基金项目(SKLTKF12A04);贵州省科学技术基金项目(黔科合J字[2012]2118号;黔科合J字[2011]2011号);贵州大学青年科学技术基金项目(贵大自青基合字[2010]053号;贵大自青基合字[2010]020号);贵州大学人才引进基金项目(贵大人基合字[2011]13号)

摘　　要：将KH550偶联剂修饰的纳米蒙脱石和纳米坡缕石,分别按质量比3%添加到150N基础油中制备2种纳米润滑油分散体系,用激光粒度分析仪、TEM、IR表征纳米添加剂的分散稳定性,在MMU-10G摩擦磨损试验机上测试2种纳米润滑油对45#钢的减摩抗磨性能,用SEM和EDX等分析摩擦试样表面成分与形貌的变化及影响摩擦学性能的机制。结果表明:纳米蒙脱石平均粒径较小,在150N基础油中分散更稳定;2种纳米润滑油相比纯基础油润滑时的平均摩擦因数和磨损量均明显下降,其中纳米蒙脱石润滑油的抗磨减摩性能最好;2种纳米润滑油润滑时摩擦试样表面分别生成了含蒙脱石和坡缕石特征元素的自修复膜层,其中蒙脱石特征元素含量相对较高,说明纳米蒙脱石摩擦学性能更好。The nano lubricating oil dispersion systems were prepared by adding 3% modified nano-montmorillonite （nano-MMT） and nano-palygorskite （nano-P） by coupling agent KH550 into the 150N base oil, and the dispersion effect of nano-MMT and nano-P in 150N base oil was analyzed by laser particle size analyzer,TEM and IR. The anti-wear and friction reducing behaviors of the nano lubricating oils were investigated on the MMU-10G abrasive-wear tester with 45 steel as tribo-pairs, and the morphology and the element of the worn surfaces were analyzed by SEM and EDX. The results show that the modified nano-MMT has smaller grain size than nano-P, which has better dispersion stability in 150N base oil. The average friction coefficient and the wear mass loss of the 45 steel tribo-pairs are declined in the nano lubricating oil dispersion systems compared with the base oil system, and the nano-MMT lubricating oil has the best anti-wear and friction reducing properties. The self-repairing films that contain the characteristic elements of montmorillonite and paly- gorskite are formed on the samples surface when lubricated by nano-MMT and nano-P lubricating oils separately, and the content of montmorillonite characteristic elements is relatively high, indicating that the nano-MMT lubricant additive has better tribological properties to 45 steel tribo-pairs.

关 键 词：蒙脱石 坡缕石 润滑油添加剂 摩擦磨损 自修复膜 

分 类 号：TH117.2[机械工程—机械设计及理论]