微纳米ZnO在PEG400中的原位合成及其摩擦学性能研究  

In-situ Synthesis and Tribological Properties of ZnO Micro/nanoparticles in PEG400

作　　者：李正阳[1] 王李波[1] 李平[1] 李良[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《润滑与密封》2012年第11期51-54,58,共5页Lubrication Engineering

基　　金：中国科学院兰州化物所固体润滑国家重点实验室开放基金项目(0802);河南理工大学博士基金项目(B2008-42)

摘　　要：采用微波辅助加热原位高温分解的方法制备ZnO微纳米微粒,利用XRD、FESEM分析仪器对其结构形貌进行表征。利用四球摩擦磨损试验机考察ZnO微纳米微粒作为PEG400添加剂的摩擦学行为,并用扫描电子显微镜(SEM)和X-射线光电子能谱(XPS)等现代分析手段对钢球摩擦表面进行分析。结果表明:所制备的ZnO微纳米颗粒平均粒径在0.5～1μm之间,是由大量直径在50 nm左右的小颗粒组成;其作为润滑添加剂能够明显提高聚乙二醇400的减摩性能,并在低载荷时具有较好的抗磨性能;其摩擦机制为ZnO微纳米颗粒在摩擦过程中在钢球摩擦副表面沉积下来,生成由氧化锌、氧化铁及有机吸附物组成的具有良好摩擦学性能的润滑防护膜,从而改善了PEG400的摩擦学性能。The ZnO micro/nanoparticles were prepared using zinc acetate as starting reactants via a microwave-assisted process. The structural and morphologies of the samples were characterized by X-ray diffraction and field emission scanning electron microscope. The tribological properties of the prepared ZnO micro/nanoparticles as an additive in PEG400 were evaluated with a four-ball tester. Results show that the average diameter of ZnO micro/nanoparticles is around 0. 5 - 1 μm, composed of many little nanoparticles with diameter of 50 nm. Friction and wear tests indicate that ZnO micro/nanoparti- cles are able to increase the friction reduction abilities of PEG400. SEM and XPS analysis indicates that a boundary film mainly composed of ZnO, FexOy and some adsorbed organic compounds is formed during the friction process. This contrib- utes to improve the tribological properties of PEG400.

关 键 词：ZnO微纳米颗粒 微波 PEG400 摩擦学性能 

分 类 号：TG356.16[金属学及工艺—金属压力加工]