The influence of 0.5, 0.75, and 1 wt.% of graphene oxide (GrO) in nanocomposite coating on scratch behavior and tribological performance was analyzed. Graphite was oxidized using the Marcano and Tour method to obtain graphite oxide, which is thermally exfoliated at 700°C getting graphene oxide. The transformation of graphite to graphene oxide was evaluated via Raman spectroscopy and X-ray diffraction. Effects of graphene oxide content on the friction and wear behavior of polyester composite coatings were evaluated under dry sliding conditions. Experimental findings showed that the addition of 0.5 wt.% GrO was effective in reducing the friction coefficient of polyester coating. Meanwhile, under the same sliding conditions, the wear results revealed that the polyester coating filled with 1 wt.% GrO has better antiwear ability compared to those filled with 0.5 and 0.75 wt.% GrO. From the scratch analyses, we deduced that coating scratch behavior was highly affected by the amount of fillers inside the polyester matrix. In fact, the best friction characteristic and scratch resistance were observed in the case of polyester coatings filled with the lower amount of GrO, namely 0.5 wt.%.

分析了纳米复合涂层中 0.5、0.75 和 1 wt.% 的氧化石墨烯 (GrO) 对划痕行为和摩擦学性能的影响。使用 Marcano 和 Tour 方法氧化石墨以获得氧化石墨，将其在 700°C 下热剥离得到氧化石墨烯。通过拉曼光谱和 X 射线衍射评估石墨向氧化石墨烯的转变。在干滑动条件下评估了氧化石墨烯含量对聚酯复合涂层摩擦磨损行为的影响。实验结果表明，添加 0.5 wt.% GrO 可有效降低聚酯涂层的摩擦系数。同时，在相同的滑动条件下，磨损结果表明聚酯涂层填充了 1 wt. 与填充 0.5 和 0.75 wt.% GrO 的那些相比，% GrO 具有更好的抗磨损能力。从划痕分析中，我们推断涂层划痕行为受聚酯基体内填料量的影响很大。事实上，在填充了较低量 GrO（即 0.5 wt.%）的聚酯涂层的情况下，观察到了最佳的摩擦特性和抗划伤性。