Improvement of the Tribological Properties of a Lithium-Based Grease by Addition of Graphene
Graphene with layer number less than seven, prepared by a mechanical exfoliation method, was used as a friction-reducing additive to a lithium-based grease. The graphene was characterized via AFM, TEM, and Raman spectroscopy. The as-prepared graphene had few defects according to the
characterization analysis and appeared to be composed primarily of sheets averaging 1–4 atomic layers. When the graphene was added to a lithium-based grease, the lubrication and antiwear properties of the grease were improved, as quantified by friction coefficient and wear scar measurements.
The weld point of the lithium-based grease increased proportionally with graphene loading. At the maximum graphene loading tested (2 wt%), the weld point was 1.6 times that of the pure lithium-based grease. Hence the mechanical properties of the graphene sheets played an important role in
improving the tribological properties of the grease.
Keywords: GRAPHENE; GREASE; LITHIUM; TRIBOLOGY
Document Type: Research Article
Publication date: 01 October 2018
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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