石墨烯/铜复合润滑油添加剂的制备及性能研究  

Preparation and performance evaluation of graphene/copper composite as lubricating oil additive

作　　者：孙昊南 程淳熙 徐平 林祥宝 张明瑜[1] 黄启忠[1] SUN Hao-nan;CHENG Chun-xi;XU Ping;LIN Xiang-bao;ZHANG Ming-yu;HUANG Qi-zhong(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《炭素》2024年第3期26-34,共9页Carbon

摘　　要：随着润滑领域研究的不断深入,人们发现复合润滑添加剂与单一添加剂相比,具有增强的协同润滑性能和优越的润滑效果。其中,石墨烯/铜(GR/Cu)纳米复合材料具有独特的结构和优异的力学性能,在润滑领域具有巨大的应用潜力。然而,石墨烯和纳米铜颗粒在润滑领域的应用受到易团聚、分散性差、石墨烯与铜之间界面润湿性差等诸多挑战的限制。本研究采用化学镀铜方法,用片状石墨烯(GP)和树枝状石墨烯(FG)制备了石墨烯/铜纳米复合材料。通过油酸和硬脂酸处理对复合材料进行表面改性,然后在酯类基础油中分散,生产出具有优异分散性的润滑油添加剂。结构分析证实了铜纳米颗粒在两种石墨烯表面的均匀分散,确保了增强的润滑效果。分散实验表明,制备的石墨烯/铜复合材料在酯类基础油中分散均匀。摩擦学实验表明,添加一定量(0.05wt%)的润滑油添加剂可在一定程度上降低摩擦系数和磨损疤痕直径。With the deepening research in the lubrication field,it has been discovered that composite lubricant additives exhibit enhanced synergistic lubricating performance and superior lubrication effects compared to single additives.Among them,graphene/copper(GR/Cu)nanocomposites possess unique structures and excellent mechanical properties,holding tremendous application potential in the field of lubrication.However,the application of graphene and nano copper particles in the field of lubrication is limited due to challenges such as facile agglomeration,poor dispersibility,and weak interfacial wettability between graphene and copper.The present study employed the electroless copper plating method to fabricate GR/Cu nanocomposites using two types of graphene,namely sheet graphene(GP)and flake dendritic graphene(FG).Surface modification of the composites was performed through oleic acid and stearic acid treatment,followed by dispersion in ester base oil to produce lubricant additives with exceptional dispersibility.The structural analysis confirms the uniform dispersion of copper nanoparticles on the surfaces of both types of graphene,thereby further ensuring an enhanced lubrication effect.The dispersion experiments demonstrated the uniform dispersion of both prepared GR/Cu composite materials in ester base oil.The tribological experiments revealed that the addition of a specific amount(0.05wt%)of the lubricant additives resulted in extent reduction in both friction coefficient and wear scar diameter.

关 键 词：石墨烯/铜复合材料 化学镀铜 分散性 摩擦性能 润滑油 

分 类 号：TB333[一般工业技术—材料科学与工程]