How the fluorographene replaced graphene as nanoadditive for improving tribological performances of GTL-8 based lubricant oil  

作　　者：Xiaojing CI Wenjie ZHAO Jun LUO Yangmin WU Tianhao GE Qunji XUE Xiulei GAO Zhiwen FANG 

机构地区：[1]Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]School of Materials and Engineering,Shanghai University,Shanghai 200000,China [3]Engineering Technology Research Center of Fluorocarbon Materials,Shandong Zhongshan Photoelectric Materials Co.,Ltd.,Zibo 255138,China

出　　处：《Friction》2021年第3期488-501,共14页摩擦（英文版）

基　　金：the National Natural Science Foundation of China(51775540);Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(QYZDY-SSW-JSC009);the Youth Innovation Promotion Association,CAS(2017338).

摘　　要：Fluorographene,a new alternative to graphene,it not only inherits the 2-dimensional(2D)layered structure and outstanding mechanical properties,but also possesses controllable C-F bonds.It is meaningful to reveal the evolution processes of the tribological behaviors from graphene to fluorographene.In this work,fluorinated reduced graphene oxide nanosheets(F-rGO)with different degree of fluorination were prepared using direct gas-fluorination and they were added into gas to liquid-8(GTL-8)base oil as lubricant additive to improve the tribological performance.According to the results,the coefficient of friction(COF)reduced by 21%,notably,the wear rate reduced by 87%with the addition of highly fluorinated reduced graphene oxide(HF-rGO)compared with rGO.It was confirmed that more covalent C-F bonds which improved the chemical stability of HF-rGO resisted the detachment of fluorine so the HF-rGO nanosheets showed less damage,as demonstrated via X-ray photoelectron spectroscopy(XPS),Raman spectra,and transmission electron microscopy(TEM).Meanwhile,the ionic liquid(IL)adsorbed on HF-rGO successfully improved the dispersibility of F-rGO in GTL-8 base oil.The investigation of tribofilm by TEM and focused ion beam(FIB)illustrated that IL displayed a synergy to participate in the tribochemical reaction and increased the thickness of tribofilm during the friction process.

关 键 词：reduced graphene oxide fluorographene lubricating oil FRICTION WEAR TRIBOFILM 

分 类 号：TH117.22[机械工程—机械设计及理论]