PMMA/SiO2纳米杂化材料的制备及作为润滑油添加剂的摩擦学性能

Preparation and tribological performance of P composite as lubricating oil additives

用无皂乳液聚合法，一步制备了聚甲基丙烯酸甲酯，表面有机化二氧化硅（PMMA／SiO2）纳米杂化材料，采用了红外光谱（FT-IR）、透射电子显微镜（TEM）以及热分析（TGA-DSC）等仪器对材料的核一壳结构进行表征，利用四球机考察了添加剂在AN10全损耗系统用油中的摩擦学性能。结果表明，合成的PMMA／SiO，纳米杂化材料能提高润滑油的抗磨性能及承载能力，并能降低摩擦系数，其最佳用量为1．5％，同时，PMMA／SiO2纳米杂化材料能极大地提高润滑油的极压性能。

Polymethyl methacrylate/surface organically modified silica （PMMA/SiO2） nano-hybrid composite was synthesized through ＂one-step＂ soap-free emulsion polymerization. The resulting composite with core-shell structure was characterized by means of fourier transform infrared （FT-IR） spectroscopy, transmission electron microscopy （TEM） and thermal analysis （TGA-DSC）. The effect of the PMMA/SiO2 nano-hybrid composite as additive on the tribological properties of AN 10 oil was examined using a four-ball friction and wear tester. As the results, the PMMA/SiO2 nano-hybrid composite was effective in improving the steel-to-steel load-carrying capacity, anti-wear ability and friction coefficient of AN 10 oil. The optimal concentration of the PMMA/SiO2 in the AN 10 oil was suggested to be about 1.5%, at which the optimized friction-reducing and anti-wear abilities were recorded. The PMMA/SiO2 contributed to effectively enhance the extreme-pressure capacity of the based oil.