Three-dimensional graphene nanosheet films towards high performance solid lubricants
Three-dimensional graphene nanosheet films towards high performance solid lubricants
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DOI：
10.1016/j.apsusc.2018.10.125
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发表时间：
2019-02-15
影响因子：
6.7
通讯作者：
Jie, X. H.
中科院分区：
文献类型：
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作者：
Chen, F. X.;Mai, Y. J.;Jie, X. H.
石墨烯纳米片薄膜（GNSF）作为固体润滑剂显示出巨大的潜力。然而，它们通常遭受短寿命和低负载能力，限制了它们的进一步工程应用。在这项工作中，我们试图解决这些关键的挑战，第一次，通过引入一个独特的三维微观结构到GNSF。所制备的三维石墨烯纳米片膜（3D-GNSF）由许多褶皱和部分直立的石墨烯纳米片（GNS）组成，这些石墨烯纳米片彼此重叠并形成三维互连网络。利用扫描电子显微镜、X射线衍射仪、透射电子显微镜和X射线光电子能谱仪对3D-GNSF的形貌、组成和结构进行了详细的研究，并推测了其可能的形成机理。摩擦学测试在空气中进行，作为高达约1GPa的接触压力的函数。结果表明，3D-GNSF的独特结构使其能够快速形成由GNS对GNS组成的紧凑稳定的滑动界面，从而使3D-GNSF成为具有低摩擦、优异耐磨性、良好耐久性和高载荷能力的有前途的固体润滑剂。
Graphene nanosheet films (GNSF) show great potential as solid lubricants. They, however, usually suffer from short lifetime and low load capability, limiting their further engineering application. In this work, we try to address these crucial challenges, for the first time, by inducing a unique three-dimensional microstructure into the GNSF. The as-prepared three-dimensional graphene nanosheet films (3D-GNSF) are composed of many crumpled and partially standing graphene nanosheets (GNS) that overlap with each other and form a three-dimensional interconnected network. The morphology, composition and structure of the 3D-GNSF are investigated in detail using scanning electron microscope, X-ray diffractometer, transmission electron microscope and X-ray photoelectron spectroscopy to deduce their possible formation mechanism. Tribological tests are conducted in air as a function of contact pressure that is up to about 1GPa. The results suggest it is the unique architecture of the 3D-GNSF that quickly produces a compact and stable sliding interface consisting of GNS against GNS, enabling 3D-GNSF as promising solid lubricants with low friction, excellent anti-wear ability, good durability and high load capability.