Detail publikačního výsledku

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

POLÁČEK, T.; ŠPERKA, P.; KŘUPKA, I.

Originální název

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

Anglický název

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

Druh

Článek WoS

Originální abstrakt

Macroscale 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.

Anglický abstrakt

Macroscale 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.

Klíčová slova

macroscale superlubricity; super low traction; water-based lubricants; elastohydrodynamic lubrication (EHL); film thickness

Klíčová slova v angličtině

macroscale superlubricity; super low traction; water-based lubricants; elastohydrodynamic lubrication (EHL); film thickness

Autoři

POLÁČEK, T.; ŠPERKA, P.; KŘUPKA, I.

Rok RIV

2024

Vydáno

28.07.2023

Nakladatel

TSINGHUA UNIV PRESS

Místo

BEIJING

ISSN

2223-7704

Periodikum

Friction

Svazek

12

Číslo

1

Stát

Čínská lidová republika

Strany od

164

Strany do

173

Strany počet

10

URL

https://link.springer.com/article/10.1007/s40544-023-0762-6

Plný text v Digitální knihovně

http://hdl.handle.net/11012/245009

BibTex

@article{BUT185046,
  author="Tomáš {Poláček} and Petr {Šperka} and Ivan {Křupka}",
  title="Liquid superlubricity of lubricants containing hydroxyl groups and their aqueous solution under rolling/sliding conditions",
  journal="Friction",
  year="2023",
  volume="12",
  number="1",
  pages="164--173",
  doi="10.1007/s40544-023-0762-6",
  issn="2223-7690",
  url="https://link.springer.com/article/10.1007/s40544-023-0762-6"
}

Dokumenty

s40544-023-0762-6