Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene
This study investigated the friction behavior of graphene in air and nitrogen atmosphere environments. The microstructural evolution caused by the variation of atmosphere environments and its effect on the friction coefficient of the graphene is explored. It is demonstrated that graphene can exhibit...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2021-06-01
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| Series: | Frontiers in Chemistry |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fchem.2021.679417/full |
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| author | Panpan Li Panpan Li Panpan Li Bo Wang Li Ji Li Ji Hongxuan Li Hongxuan Li Lei Chen Lei Chen Xiaohong Liu Xiaohong Liu Huidi Zhou Huidi Zhou Jianmin Chen Jianmin Chen |
| author_facet | Panpan Li Panpan Li Panpan Li Bo Wang Li Ji Li Ji Hongxuan Li Hongxuan Li Lei Chen Lei Chen Xiaohong Liu Xiaohong Liu Huidi Zhou Huidi Zhou Jianmin Chen Jianmin Chen |
| author_sort | Panpan Li |
| collection | DOAJ |
| description | This study investigated the friction behavior of graphene in air and nitrogen atmosphere environments. The microstructural evolution caused by the variation of atmosphere environments and its effect on the friction coefficient of the graphene is explored. It is demonstrated that graphene can exhibit excellent lubricating properties both in air and nitrogen atmosphere environments. In air, a highly ordered layer-by-layer slip structure can be formed at the sliding interface. Oxygen and H2O molecules can make edge dangling bonds and defects passive. Thus the interaction between the nanosheets and the layers of nanosheets is weak and the friction coefficient is low (0.06–0.07). While the friction coefficient increases to 0.14–0.15 in a nitrogen atmosphere due to the interaction of defects generated in the sliding process, the nitrogen molecules with lone pair electrons can only make the nanosheets passive to a certain degree, thus the ordered slip structure is destroyed and friction is higher. This work reveals the influence of environmental molecules on the macroscale tribological performances of graphene and its effect on the microstructure at the sliding interface, which could shed light on the lubricating performance of graphene in environmental atmospheres and help us to understand the tribological behaviors of graphite at the macroscale. |
| first_indexed | 2024-04-11T20:08:58Z |
| format | Article |
| id | doaj.art-236b14678b744c088f910785105cc1b3 |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-04-11T20:08:58Z |
| publishDate | 2021-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-236b14678b744c088f910785105cc1b32022-12-22T04:05:11ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462021-06-01910.3389/fchem.2021.679417679417Environmental Molecular Effect on the Macroscale Friction Behaviors of GraphenePanpan Li0Panpan Li1Panpan Li2Bo Wang3Li Ji4Li Ji5Hongxuan Li6Hongxuan Li7Lei Chen8Lei Chen9Xiaohong Liu10Xiaohong Liu11Huidi Zhou12Huidi Zhou13Jianmin Chen14Jianmin Chen15Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaState Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, ChinaCenter of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, ChinaThis study investigated the friction behavior of graphene in air and nitrogen atmosphere environments. The microstructural evolution caused by the variation of atmosphere environments and its effect on the friction coefficient of the graphene is explored. It is demonstrated that graphene can exhibit excellent lubricating properties both in air and nitrogen atmosphere environments. In air, a highly ordered layer-by-layer slip structure can be formed at the sliding interface. Oxygen and H2O molecules can make edge dangling bonds and defects passive. Thus the interaction between the nanosheets and the layers of nanosheets is weak and the friction coefficient is low (0.06–0.07). While the friction coefficient increases to 0.14–0.15 in a nitrogen atmosphere due to the interaction of defects generated in the sliding process, the nitrogen molecules with lone pair electrons can only make the nanosheets passive to a certain degree, thus the ordered slip structure is destroyed and friction is higher. This work reveals the influence of environmental molecules on the macroscale tribological performances of graphene and its effect on the microstructure at the sliding interface, which could shed light on the lubricating performance of graphene in environmental atmospheres and help us to understand the tribological behaviors of graphite at the macroscale.https://www.frontiersin.org/articles/10.3389/fchem.2021.679417/fullgraphitegraphenemacroscale tribologysliding interfacial structureatmosphere |
| spellingShingle | Panpan Li Panpan Li Panpan Li Bo Wang Li Ji Li Ji Hongxuan Li Hongxuan Li Lei Chen Lei Chen Xiaohong Liu Xiaohong Liu Huidi Zhou Huidi Zhou Jianmin Chen Jianmin Chen Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene Frontiers in Chemistry graphite graphene macroscale tribology sliding interfacial structure atmosphere |
| title | Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene |
| title_full | Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene |
| title_fullStr | Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene |
| title_full_unstemmed | Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene |
| title_short | Environmental Molecular Effect on the Macroscale Friction Behaviors of Graphene |
| title_sort | environmental molecular effect on the macroscale friction behaviors of graphene |
| topic | graphite graphene macroscale tribology sliding interfacial structure atmosphere |
| url | https://www.frontiersin.org/articles/10.3389/fchem.2021.679417/full |
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