花状O-MoS2添加剂的制备及摩擦学性能研究

利用一步水热法制备了氧并入二硫化钼(O-MoS_2)纳米花,该纳米花由大量O-MoS_2纳米片组装而成.由于氧元素的并入,使得MoS_2中(002)晶面间距从6.15?增大至10.5?.利用SRV-I微振动摩擦磨损试验机考察了O-MoS_2纳米花作为添加剂在PAO-8基础油中的摩擦学性能,结果表明:O-MoS_2纳米花的加入可显著改善PAO-8油的减摩抗磨性能,这主要是由于膨胀的层间距有利于MoS_2沿(002)晶面发生滑移.其中,当O-MoS_2纳米花的添加含量为0.1 mg/m L时,润滑油的抗磨损性能最佳.

Preparation and Tribological Performance of O-MoS2 Nanoflowers as an Effective Lubricant Additive

In this study, a simple one-step hydrothermal method was developed to synthesize oxygen-incorporated molybdenum disulphide (O-MoS₂) nanoflowers, which possessed a new structure with the enlarged (002) interlayer spacing of about 10.5 Å compared with the value of 6.15 Å for the pristine MoS₂, owing to the incorporation of oxygen atoms into the skeleton of MoS₂. Moreover, the sample of O-MoS₂ nanoflower exhibited extraordinary tribological performance as novel additive in poly alpha olefin base oil (PAO-8) because of smaller slip resistance of enlarged (002) planes. Experimental results indicate that the optimal concentration of the O-MoS₂ nanoflower in PAO-8 was 0.1 mg/mL.