Study on the relationship between the tribological properties and oxidation degree of graphene derivatives in O/W emulsion
Study on the relationship between the tribological properties and oxidation degree of graphene derivatives in O/W emulsion
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DOI：
10.1016/j.triboint.2021.106875
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发表时间：
2021-05
影响因子：
6.2
通讯作者：
Yinglei Wu;Tao Sun;Zhongyi He;Xiangqiong Zeng;T. Ren;E. de Vries;E. van der Heide
中科院分区：
文献类型：
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作者：
Yinglei Wu;Tao Sun;Zhongyi He;Xiangqiong Zeng;T. Ren;E. de Vries;E. van der Heide
氧化石墨烯（GO）分别用十八烷基胺（ODA）对MGO1和MGO2进行了单侧和双面改性。将MGO1和MGO2分别加入到O/W基乳液中，改变了边界层和油相的组成。结果表明，mgo1乳液的摩擦学性能优于mgo2乳液。磨损表面的化学成分分析表明，MGO1纳米片比MGO2纳米片更容易吸附在轴承钢表面，更容易与轴承钢反应生成含c - n - o - fe的化合物，MGO1纳米片更积极地参与接触区域发生的剪切过程。扫描电镜和纳米压痕分析表明，金属基体上存在一层不均匀的较软的mgo1摩擦膜。
Graphene oxide (GO) underwent a single and double-side modification with octadecylamine (ODA) to MGO1 and MGO2 respectively. MGO1 and MGO2 were incorporated into the O/W base emulsion respectively to change the composition of the boundary layer and the oil phase. It was found that the tribological properties of MGO1-emulsion were better than that of MGO2-emulsion. Chemical composition analysis of the worn surfaces suggests that MGO1 nanosheets might adsorb more easily onto the surface and react better with the bearing steel to produce C–N–O–Fe-containing compounds than do MGO2 nanosheets, and that MGO1 nanosheets were more actively involved in the shear process that occurs in the contact area. SEM and nanoindentation indicated that there was a non-uniform softer MGO1-tribofilm on metal substrate.