Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions

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dc.contributor.authorPoláček, Tomášcs
dc.contributor.authorŠperka, Petrcs
dc.contributor.authorKřupka, Ivancs
dc.coverage.issue1cs
dc.coverage.volume12cs
dc.date.issued2023-07-28cs
dc.description.abstractMacroscale rolling/sliding conditions are in the superlubricity, a little-studied topic so far. The purpose of this paper is to examine the formation of elastohydrodynamic lubrication (EHL) films by water-based lubricants (glycerol and polyethylene glycol (PEG)), providing superlubricous friction. Experiments were carried out on an optical ball-on-disc tribometer under rolling/sliding conditions. The film thickness was measured by the thin film colorimetric interferometry, and the viscosity of liquids was measured by rotational and high-pressure falling body viscometers. The results show that tribochemical reactions are not the mandatory reason for friction to reach the superlubricity level when using the water-based lubricants. The studied liquids themselves are almost Newtonian. With the addition of water, the signs of shear thinning behavior disappear even more. Suitable conditions for this type of lubricant can be predicted using the known Hamrock-Dowson equations. An anomaly in the thickness of the lubricants was observed as an abrupt change at certain conditions. The more PEG there is in the lubricant, the higher the thickness at the beginning of the jump.en
dc.formattextcs
dc.format.extent164-173cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationFriction. 2023, vol. 12, issue 1, p. 164-173.en
dc.identifier.doi10.1007/s40544-023-0762-6cs
dc.identifier.issn2223-7704cs
dc.identifier.orcid0000-0002-2327-8342cs
dc.identifier.orcid0000-0002-4994-3144cs
dc.identifier.orcid0000-0002-9936-7480cs
dc.identifier.other185046cs
dc.identifier.researcheridJNE-5687-2023cs
dc.identifier.researcheridB-3574-2012cs
dc.identifier.researcheridD-8147-2012cs
dc.identifier.scopus35194509500cs
dc.identifier.urihttp://hdl.handle.net/11012/245009
dc.language.isoencs
dc.publisherTSINGHUA UNIV PRESScs
dc.relation.ispartofFrictioncs
dc.relation.urihttps://link.springer.com/article/10.1007/s40544-023-0762-6cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2223-7704/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectmacroscale superlubricityen
dc.subjectsuper low tractionen
dc.subjectwater-based lubricantsen
dc.subjectelastohydrodynamic lubrication (EHL)en
dc.subjectfilm thicknessen
dc.titleLiquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditionsen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-185046en
sync.item.dbtypeVAVen
sync.item.insts2025.02.27 18:24:20en
sync.item.modts2025.02.24 15:32:09en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav konstruovánícs
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