【摘要】 通过硅烷偶联剂“桥”的作用 ,引入了聚甲基丙烯酸甲酯 (PMMA) ,成功地制备出以无机纳米粒子TiO2为核 ,聚合物 (PMMA)为壳的复合纳米材料 .通过四球机研究了其作为水基液添加剂的摩擦学性能 ,实验结果证明 ,表面修饰的纳米粒子比未经修饰的纳米粒子具有较小的磨斑直径 ,较高的极压值 ;在高载荷下具有较好的抗磨、减磨性能 .用透射电子显微镜 (TEM )对其进行了形貌分析 ,用扫描电子显微镜 (SEM )观察了钢球磨斑表面形貌更多还原

【Abstract】 The surface of nanometer TiO₂ powders was modified by silane coupling agents and treated respectively by PMMA. A novel nanocomposite with the structure of TiO₂ as core and polymer as shell was prepared. The shape of the additives was viewed via Transmission Electron Microscope （TEM）. Tribological properties of PMMA TiO₂ as additives in water based lubrication were studied by four ball machine, while wear scar of steel ball was observed by a Scanning Electron Microscope （SEM）. It was found that modified TiO₂ possesses less Wear Scanning Diameter （WSD） and higher extreme pressure value, antiwear performance especially under high load.更多还原