摘要
以石墨烯和纳米Fe3O4为原料,采用化学修饰的方法制备石墨烯负载四氧化三铁(G/Fe3O4)复合材料。通过透射电镜、X射线衍射仪、傅里叶红外光谱仪对复合材料进行表征;在SN5W-30润滑油中添加G/Fe3O4复合材料,利用等离子体光谱仪和四球摩擦试验机研究复合材料在润滑油中的分散稳定性和摩擦学性能。结果表明:使用油酸和硅烷偶联剂KH570共同修饰生成的G/Fe3O4复合材料在石墨烯表面分散效果比单独使用油酸修饰的好;沉淀稳定性实验表明:放置10d后,未添加复合材料的润滑油铁元素含量下降了48.3%,添加采用油酸修饰的复合材料铁元素含量下降了39%,添加采用油酸和KH570共同修饰的复合材料铁元素含量下降了31.1%;四球摩擦实验表明G/Fe3O4复合材料作为润滑油添加剂具有良好的摩擦学性能,使用油酸和KH570共同修饰的效果要比单独使用油酸修饰的好,最大无卡咬负荷PB增大了6.5%,摩斑直径减小了4.4%,摩擦因数降低了4.8%。
Graphene loaded ferric oxide(G/Fe3O4)composites were prepared by chemical modification using graphene and nano-Fe3O4 as raw materials.The composites were characterized by transmission electron microscope,X-ray diffractometer and Fourier infrared spectrometer,and G/Fe3O4 composites were added to SN 5 W-30 lubricating oil,and the dispersion stability and tribological properties of composites in lubricating oil were studied by plasma spectrometer and four ball friction tester.The results show that G/Fe3O4 composite materials generated by the co-modification of oleic acid and silane coupling KH570 are better dispersed on the graphene surface than with oleic acid modification alone;precipitation stability experiments show 10 days later,iron content in the lubricating oil is decreased by 48.3%without composite added,iron content is decreased by 39%with oleic acid modified composite added,and iron content is decreased by 31.1%with oleic acid and KH570 jointly modified composite;four-ball experiments show that G/Fe3O4,composites acting as lubricating oil additives have good tribological properties,the use of oleic acid and KH570 joint modification effect is better than the use of oleic acid modification,the maximum card-free bite load PB is increased by 6.5%,the diameter of the mocha is decreased by 4.4%and the coefficient of friction is decreased by 4.8%.
作者
杨礼河
陈绪望
张建国
孙玉德
YANG Li-he;CHEN Xu-wang;ZHANG Jian-guo;SUN Yu-de(Internal Combustion Engine Research Institute,Tianjin University,Tianjin 300072,China;School of Mechanical Engineering,Tianjin University,Tianjin 300072,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2021年第2期143-148,共6页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51876141)。
作者简介
通讯作者:杨礼河(1966-),男,副研究员,博士,主要从事油品评定及代用燃料研究,联系地址:天津市南开区天津内燃机研究所(300072),E-mail:ylh@tju.edu.cn。
