Zhang Lei, Sun Xin, Liu Xiang, He Yuanhua, Chen Yonggang, Liao Zhenwei, Gao Han, Wang Shuo
College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Deyang, Sichuan 618307, P R of China.
Key Laboratory of Fire Science and Safety Engineering of Sichuan Province, Deyang, Sichuan 618307, P R of China.
ACS Omega. 2021 Jan 28;6(5):3840-3846. doi: 10.1021/acsomega.0c05604. eCollection 2021 Feb 9.
Diacetoxy-stearoyloxy-titanium-modified graphene oxide (Titanate-GO) was successfully prepared using titanium tetraisopropanolate, stearic acid, acetic acid, and graphene oxide (GO). The morphology and structure of the as-prepared materials were tested by FT-IR, Raman, TG/DSC, SEM, and TEM instruments. The results indicate that long alkyl titanium chains have been grafted on the surface of a GO sheet, which guaranteed the dispersibility of Titanate-GO in PAO10 base oil. Then, the lubrication properties of Titanate-GO as a lubricating additive in PAO10 base oil were evaluated on a four-ball machine. The results show that the average coefficient of friction and wear scar diameter were reduced by 49.5 and 28.2%, respectively, compared with bare PAO10 base oil. Finally, the lubrication mechanism was discussed based on the Raman analysis, which was carried out on the worn surface of the steel ball.
采用四异丙醇钛、硬脂酸、乙酸和氧化石墨烯（GO）成功制备了二乙酰氧基 - 硬脂酰氧基 - 钛改性氧化石墨烯（钛酸酯 - GO）。通过傅里叶变换红外光谱仪（FT - IR）、拉曼光谱仪、热重/差示扫描量热仪（TG/DSC）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对所制备材料的形貌和结构进行了测试。结果表明，长链烷基钛已接枝在氧化石墨烯片层表面，这确保了钛酸酯 - GO在聚α - 烯烃10（PAO10）基础油中的分散性。然后，在四球试验机上评估了钛酸酯 - GO作为PAO10基础油中润滑添加剂的润滑性能。结果表明，与纯PAO10基础油相比，平均摩擦系数和磨斑直径分别降低了49.5%和28.2%。最后，基于对钢球磨损表面进行的拉曼分析对润滑机理进行了探讨。
