The effect of gas turbine lubricant base oil molecular structure on friction

Jake Airey; Matthew Spencer; Richard Greenwood; Mark Simmons

doi:10.1016/j.triboint.2019.106052

The effect of gas turbine lubricant base oil molecular structure on friction

Jake Airey, Matthew Spencer, Richard Greenwood, Mark Simmons

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

430 Downloads (Pure)

Abstract

The effect of molecular structure of lubricant polyol ester base oils on friction was studied. A Mini-Traction Machine was used to produce Stribeck curves under representative oil system conditions. The base oils were examined independent of viscosity to isolate the impact of the molecular structure. The effect of chain length, the number of ester groups and the effect of branching were investigated. Friction decreases as the chain length increases, as the number of ester groups increases and as the amount of branching decreases. The decrease in friction as the chain length and number of ester groups increases was attributed to improved packing efficiency and that longer chains can better separate surfaces. However, branching increases friction due to hindering packing efficiency.

Original language	English
Article number	106052
Journal	Tribology International
Early online date	1 Nov 2019
DOIs	https://doi.org/10.1016/j.triboint.2019.106052
Publication status	E-pub ahead of print - 1 Nov 2019

Keywords

Base oil
Friction
Synthetics
Lubrication

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abstract = "The effect of molecular structure of lubricant polyol ester base oils on friction was studied. A Mini-Traction Machine was used to produce Stribeck curves under representative oil system conditions. The base oils were examined independent of viscosity to isolate the impact of the molecular structure. The effect of chain length, the number of ester groups and the effect of branching were investigated. Friction decreases as the chain length increases, as the number of ester groups increases and as the amount of branching decreases. The decrease in friction as the chain length and number of ester groups increases was attributed to improved packing efficiency and that longer chains can better separate surfaces. However, branching increases friction due to hindering packing efficiency.",

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AU - Spencer, Matthew

AU - Greenwood, Richard

AU - Simmons, Mark

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N2 - The effect of molecular structure of lubricant polyol ester base oils on friction was studied. A Mini-Traction Machine was used to produce Stribeck curves under representative oil system conditions. The base oils were examined independent of viscosity to isolate the impact of the molecular structure. The effect of chain length, the number of ester groups and the effect of branching were investigated. Friction decreases as the chain length increases, as the number of ester groups increases and as the amount of branching decreases. The decrease in friction as the chain length and number of ester groups increases was attributed to improved packing efficiency and that longer chains can better separate surfaces. However, branching increases friction due to hindering packing efficiency.

AB - The effect of molecular structure of lubricant polyol ester base oils on friction was studied. A Mini-Traction Machine was used to produce Stribeck curves under representative oil system conditions. The base oils were examined independent of viscosity to isolate the impact of the molecular structure. The effect of chain length, the number of ester groups and the effect of branching were investigated. Friction decreases as the chain length increases, as the number of ester groups increases and as the amount of branching decreases. The decrease in friction as the chain length and number of ester groups increases was attributed to improved packing efficiency and that longer chains can better separate surfaces. However, branching increases friction due to hindering packing efficiency.

KW - Base oil

KW - Friction

KW - Synthetics

KW - Lubrication

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SN - 0301-679X

JO - Tribology International

JF - Tribology International

M1 - 106052

ER -

The effect of gas turbine lubricant base oil molecular structure on friction

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Keywords

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