摘要
采用液相超声直接剥离法制备了石墨烯负载纳米Fe3O4复合材料,用SEM、TEM对其形貌进行了表征,利用多功能往复摩擦磨损试验仪考察了石墨烯负载纳米Fe3O4复合材料在纯水中的摩擦磨损性能。通过SEM、XPS分别分析了磨痕表面的形貌、典型元素的化学状态,初步探讨了石墨烯负载纳米Fe3O4复合材料在纯水中的润滑机理。结果表明：纳米Fe3O4均匀分布于多层石墨烯片层表面和层间,粒径为20~90 nm;其作为纯水添加剂具有良好的减摩抗磨性能,如试验载荷为10 N,浓度为0.01wt%的石墨烯负载纳米Fe3O4复合材料水分散体系润滑时比纯水润滑的摩擦系数和磨损体积分别下降26.7%和35.4%,这主要是由于复合材料在磨损表面形成了吸附膜、含石墨烯和纳米Fe3O4的边界润滑膜,抑制了Fe的氧化,减轻了摩擦表面的磨损。
Graphene-based Fe304 nanocomposite materials were prepared by the melthod of Liquid-phase Ultrasonic Exfoliation. Morphologies of nanocomposite materials were characterized by means of SEM and TEM Its tribological properties as a pure water additive were investigated using multi-functional reciprocating friction and wear tester. The lubrication mechanism was discussed based on results of analyses of SEM, XPS. The results showed that the Fe3O4 nanoparticles with size of 20-90 nm were densely and randomly deposited on interlamination and surface of graphene sheets. The nanocomposite materials as a pure water additive dis- played good friction-reducing and antiwear performance. Compared with pure water, the graphene-based Fe3O4 nanocomposite could reduce the friction coefficient of 26.7% and the wear mass of 35.4% under condi- tion of 10 N of load and 0.01wt% of concentration. The prosp membrane and boundary lubrication film containing graphene reduce wear on the frictional surface erity and F was attributed to the effect of adsorption Fe3O4 which inhibited oxidation of Fe and reduce wear on the frictional surface.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第1期41-46,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(5105397)
北京市自然科学基金(3122031)~~
