添加纳米二氧化硅的菜籽油润滑行为  

Lubricating Behaviour of Colza Oil with Nano-SiO_2 as Additive

作　　者：闫玉涛[1] 霍玉秋[2] 孙志礼[1] 

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110004 [2]东北大学理学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2007年第9期1321-1324,共4页Journal of Northeastern University(Natural Science)

基　　金：辽宁省教育厅资助项目(202243215)

摘　　要：采用溶胶-凝胶法,以正硅酸乙酯为原料制备了纳米二氧化硅微粒,通过透射电子显微镜对其结构进行了表征,利用四球摩擦磨损试验机测定了添加不同含量纳米二氧化硅菜籽油润滑剂摩擦学性能,采用扫描电子显微镜和能量散射谱仪观察分析了磨损表面形貌及表面元素组成.结果表明:所制备的纳米二氧化硅是粒径为50 nm球形微粒,具有很高的表面能和表面活性,具有无定形结构;纳米二氧化硅作为菜籽油添加剂能显著提高菜籽油的PB和PD值,添加量为2.5%时的润滑剂性能最好,相对应的钢球磨斑直径最小.Nano-SiO2 particles were prepared by sol-gel method with tetraethyl-orthosilicate as raw material in the presence of ammonia as catalyst. The morphology and phase structure of nanoSiO2 particles were characterized by TEM. The tribological properties of colza oil lubricant which took nano-SiO2 particles as additive in different mass fractions were investigated on a four-ball friction/wear tester. Tile worn surface of the steel balls was observed by SEM and the surface element composition was determined by means of energy dispersion spectrometry. The results show that the nano-SiO2 particles are amorphously spherical-shaped with single particle size about 50 nm, and they can provide high surface energy/activity, and make for the locked-in absorbing films. With the nano-SiO2 particles as additive, the PB and PD values of the colza oil lubricant increase significantly. The lubricating effect will be the best if the additive is 2.5 wt%, and in such a case the worn scar diameter is minimum.

关 键 词：溶胶-凝胶法 纳米二氧化硅 添加剂 菜籽油 润滑剂 

分 类 号：TH117.3[机械工程—机械设计及理论]