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Extra low friction coefficient caused by the formation of a solid-like layer: A new lubrication mechanism found through molecular simulation of the lubrication of MoS2 nanoslits
College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing Tech University, Nanjing .
College of Chemical Engineering, State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing Tech University, Nanjing .
College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. College of Chemical Engineering, State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University.ORCID iD: 0000-0003-4690-1229
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2018 (English)In: Chinese Journal of Chemical Engineering, ISSN 1004-9541, E-ISSN 2210-321XArticle in journal (Refereed) Epub ahead of print
Abstract [en]

Monolayer molybdenum disulfide (MoS2) is a novel two-dimensional material that exhibits potential application in lubrication technology. In this work, molecular dynamics was used to investigate the lubrication behaviour of different polar fluid molecules (i.e., water, methanol and decane) confined in monolayer MoS2 nanoslits. The pore width effect (i.e., 1.2, 1.6 and 2.0 nm) was also evaluated. Results revealed that decane molecules exhibited good lubricating performance compared to the other two kinds of molecules. The friction coefficient followed the order of decane < methanol < water, and decreased evidently as the slit width increased, except for decane. Analysis of the spatial distribution and mobility of different confined fluid molecules showed that a solid-like layer was formed near the slit wall. This phenomenon led to the extra low friction coefficient of confined decane molecules

Place, publisher, year, edition, pages
Elsevier, 2018.
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear) Energy Engineering
Research subject
Machine Elements; Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-68024DOI: 10.1016/j.cjche.2018.02.027OAI: oai:DiVA.org:ltu-68024DiVA, id: diva2:1191847
Available from: 2018-03-20 Created: 2018-03-20 Last updated: 2018-06-07

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Tribology (Interacting Surfaces including Friction, Lubrication and Wear)Energy Engineering

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