表面修饰SiO_2纳米微粒作为液体石蜡添加剂抗磨性能的研究

Effect of Surface Modified SiO2 Nanoparticles as Additive on the Antiwear Properties of Liquid Paraffin

用原位表面修饰法合成了异辛酸修饰SiO2纳米微粒,利用四球摩擦磨损试验机考察了SiO2纳米微粒作为液体石蜡添加剂的摩擦学行为。用扫描电子显微镜(SEM)和X射线光电子能谱仪(XPS)对钢球磨损表面进行了分析。试验结果表明,SiO2纳米微粒作为液体石蜡添加剂具有良好的抗磨损性能,能显著提高液体石蜡的失效载荷;表面修饰SiO2纳米微粒在摩擦过程中发生了摩擦化学反应,形成了含SiO2及有机分解产物等组分的复合边界润滑膜,从而表现出良好的抗磨性和较高的承载能力。

Surface modified SiO2 nanoparticles were synthesized. A four-ball machine was used to investigate the tribological behaviors of SiO2 nanoparticles used as additive in Liquid Paraffin. The worn surfaces of the steel balls were analyzed by scanning electron microscopy（SEM） and X-ray photoelectron spectroscopy（XPS）. As the resuh,SiO2 nanoparticles as additive can increase the antiwear ability and load-carrying capacity of the Liquid Paraffin. It may be attributed to the formation of a chemical reaction boundary film consisting of SiO2 and organic comoound.