Triethanolamine functionalized reduced graphene oxide (rGO-TEA(s)) nanocomposites have been synthesized by the hydrothermal method. The physical and chemical properties of rGO-TEA(s) with different degrees of functionalization were characterized by transmission electron microscopy, X-ray powder diffraction, Raman spectroscopy, and X-ray photon spectroscopy. The cold rolling lubrication of the rGO-TEA(s) prepared as nano-lubricant additives were investigated using a two-high rolling mill. The microscopic topographies of rolled strips were measured and evaluated by several physical characterizations. The results showed that the increase of functionalization time was favored to the reaction of triethanolamine and C–O–C groups on the GO surface, whereas the defects and disorder in graphene structure were repaired according to the intensity ratio of the D band to G band from 1.154 to 1.130. The cold rolling experiment results demonstrated that rGO-TEA(s) exhibited excellent lubrication properties, especially the rolled surface lubricated by rGO-TEA-10h presented few defects and minimum roughness value. The admirable lubrication performance of rGO-TEA-10h was attributed to the formation of absorption film and consecutive carbonaceous protective film.

中文翻译：

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三乙醇胺功能化还原氧化石墨烯在带钢冷轧表面的润滑性能增强

三乙醇胺功能化还原氧化石墨烯 (rGO-TEA(s)) 纳米复合材料已通过水热法合成。通过透射电子显微镜、X 射线粉末衍射、拉曼光谱和 X 射线光子光谱表征具有不同功能化程度的 rGO-TEA 的物理和化学性质。使用二辊轧机研究了作为纳米润滑剂添加剂制备的 rGO-TEA 的冷轧润滑。轧制带钢的微观形貌通过几种物理特性进行测量和评估。结果表明，官能化时间的增加有利于三乙醇胺和GO表面C-O-C基团的反应，而石墨烯结构中的缺陷和无序根据 D 带与 G 带的强度比从 1.154 到 1.130 进行修复。冷轧实验结果表明rGO-TEA(s)表现出优异的润滑性能，尤其是rGO-TEA-10h润滑的轧制表面几乎没有缺陷，粗糙度值最小。rGO-TEA-10h 优异的润滑性能归功于吸收膜和连续碳质保护膜的形成。