锐钛矿相TiO2纳米纤维制备与摩擦学性能

采用简便且可重复性较好的碱熔法制备锐钛矿相TiO2,采用简便的表面修饰技术对其进行表面改性,得到TiO2纳米纤维,并采用XRD、SEM和FT-IR方法对其进行表征。利用四球摩擦试验机考察其作为油品润滑添加剂的摩擦学性能。结果表明,所合成的TiO2纳米纤维为锐钛矿相结构,结晶度和纯度较高,而且在油品中具有良好的分散性;TiO2纳米纤维具有良好的抗磨减摩性能,并能够很好地提高油品承载能力,当其加入量为1.5%(质量分数)时,抗磨减摩以及提高承载能力的效果最好。这些特性使得锐钛矿相TiO2纳米纤维有望在未来成为绿色润滑油添加剂。

Preparation of Anatase TiO2 Nanofiber and Its Tribological Properties as Additive in Liquid Paraffin

Anatase TiO₂ nanofiber was prepared via an available alkaline hydrothermal method and surface modified. The obtained products were characterized by using X-ray diffraction (XRD), scanning electron microscope (SEM) measurements and Fourier transform infrared spectroscopy (FT-IR). The as-prepared TiO₂ nanofiber could be well dispersed in liquid paraffin, and its tribological properties as additive were evaluated with a four-ball tester. The results showed that the as-prepared TiO₂ nanofiber exhibited good performance in anti-wear and friction-reduction, load-carrying capacity, and extreme pressure properties. When addition amount of the as-prepared TiO₂ nanofiber was 1.5% of mass fraction in liquid paraffin, the best anti-friction wear reducing and bearing capacity enhancing were obtained, which made the TiO₂ nanofiber promising for green lubricating oil additives.