摘要
本文开发了一种超声辅助的Stöber法,可用于制备具有良好润滑性能的SiO_(2)核壳纳米复合材料。制备的SiO_(2)核壳型纳米复合材料含有SiO_(2)芯体和三种不同壳体:酚醛树脂(RF)、sp3主导的无机碳以及sp2主导石墨烯壳层。研究发现氨根离子能够改变表面电荷,在无表面活性剂参与的情况下实现SiO_(2)表面包覆RF。研究了RF在低温、中温、高温热解的三个关键阶段,考察了表面结合水/羟基等析出、羧基/酚类物质析出、烷基侧链等析出、石墨化进程的发展过程及Fe等催化剂的作用;探索了SiO_(2)@石墨烯作为润滑添加剂的摩擦学性能,发现相比PAO4,其摩擦系数可降低30.5%,磨损率可降低69.2%,展现出核壳型纳米复合材料的良好润滑作用。
In this paper,an ultrasound-assisted stober method is developed,which can be used to prepare SiO_(2) core-shell nanocomposites with good lubrication properties.The SiO_(2) core-shell nanocomposites prepared in this paper contain SiO_(2) core and three different shells:phenolic resin(RF),sp 3-dominated inorganic carbon and sp 2-dominated graphene shell.It was found that ammonia ions can change the surface charge and achieve SiO_(2) surface coating on RF without the involvement of surfactants.The three key stages of RF pyrolysis at low temperature,medium temperature and high temperature were studied.The development process of surface bound water/hydroxyl,carboxyl/phenolic substances,alkyl side chain and graphitization,as well as the role of Fe and other catalysts were investigated.The tribological properties of SiO_(2)@graphene as a lubrication additive were explored,and it was found that the friction coefficient and wear rate of SiO_(2)@graphene were reduced by 30.5%and 69.2%compared with PAO4,demonstrating the good lubrication effect of core-shell nanocomposites.
作者
马军
郎晓萍
罗子轩
王玉梅
孙源
MA Jun;LANG Xiaoping;LUO Zixuan;WANG Yumei;SUN Yuan(Air Force Logistics Academy of PLA,Xuzhou 221000,Jiangsu,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第S01期552-557,共6页
Materials Reports
基金
徐州市科技项目(KC22015)。
作者简介
通信作者:马军,2014年12月于国防科技大学获得博士学位,现为中国人民解放军空军勤务学院讲师。目前主要研究领域为高性能润滑添加剂,已发表论文20余篇,出版专著2部,获国家发明专利5项,manudt@163.com。
