摘要
采用液相超声直接剥离法对膨胀石墨进行超声剥离制备石墨烯。用扫描电子显微镜分析了石墨烯的微观结构和形貌，通过正交试验法优化了制备工艺参数，并在多功能往复摩擦磨损试验仪上研究了其减摩性能，对其润滑机理进行了初步探讨。结果表明，膨胀石墨被成功剥离，石墨烯薄片厚度为10－150nm，属于纳米级别，各参数对摩擦系数影响程度大小的顺序为：超声处理时间〉膨胀石墨浓度〉超声功率〉超声与间歇时间比，优化后制备的石墨烯表现出优异的减摩性能。
Graphene was prepared using the way of liquid phase ultrasonic exfoliation on the expanded graphite. The microstructure and morphology of the graphene were analyzed by scanning electron microscopy. The preparation parameters were optimized by orthogonal test. And the antifriction property of graphene was studied on a multi-functional reciprocating friction and wear tester, and the wear resistance mechanism was also discussed. The experimental results show that expanded graphite is successfully stripped, and the thickness of the graphene sheets is about 10-150 nm, belonging to the nanometer level. The impact degree of each parameters influencing the friction coefficient is ultrasonic processing time 〉 concentration of expanded graphite 〉 ultrasonic power 〉 the ratio of ultrasound and intermittent. The graphene prepared by optimized method shows excellent antifriction property.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第4期12-17,共6页
Journal of Wuhan University of Technology
基金
国家自然科学基金(5105397)
北京市自然科学基金(3122031)
关键词
减摩性能
超声剥离
膨胀石墨
石墨烯
正交试验
antifriction property
ultrasonic exfoliation
expanded graphite
graphene
orthogonal test
