The Correlation Between Molecular Structure and Tribological Properties of Graphene Oxide with Different Oxidation Degree

被引：21
|
作者：
Zhao, Lei [1 ]
Yang, Hongmei [1 ]
Liu, Chang [1 ,2 ]
Xue, Shaoqing [1 ,2 ]
Deng, Zhao [3 ]
Li, Jiusheng [1 ]
Zeng, Xiangqiong [1 ]
机构：
[1] Univ Chinese Acad Sci, Chinese Acad Sci, Shanghai Adv Res Inst, Lab Adv Lubricating Mat, Shanghai 201210, Peoples R China
[2] Shanghai Univ, Sch Environm & Chem Engn, Shanghai 20044, Peoples R China
[3] Soochow Univ, Coll Energy, Soochow Inst Energy & Mat Innovat, Suzhou 215006, Peoples R China
来源：
TRIBOLOGY LETTERS | 2019年 / 67卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Graphene oxide; Oxidation degree; Tribological properties; GRAPHITE OXIDE; CHEMICAL-REDUCTION; LUBRICATION; DISPERSIONS; NANOSHEETS; STABILITY; CHEMISTRY; BEHAVIOR; SHEETS;
D O I：
10.1007/s11249-019-1199-y
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Eight kinds of GOs with different oxidation degree were synthesized. Molecular structure characterization indicated that with more usage of H2SO4, less usage of KMnO4, and more reaction time at high temperatures (95 degrees C), the oxidation degree of GO decreased. Tribological tests showed that GO water suspensions could reduce the friction coefficient of water by 33-46% as well as decrease the wear rate of water by 36-64%. Lubrication mechanism verified the formation of GO tribofilms on the sliding surface. GO with higher oxidation degree had a better adsorption capacity and the optimum concentration was 0.15mg/ml. Moreover, some oxygen-containing groups of GO were decomposed to form a graphene-like structure, which would increase the tribological property of GO suspensions.
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收藏
页数：19
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