Imperial College London
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DrJanetWong

Faculty of Engineering, Department of Mechanical Engineering

Reader in Tribology and Mechanochemistry
 
 
 
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Contact

 

+44 (0)20 7594 8991j.wong

 
 
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Location

 

671City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Song:2024:10.1021/acsami.3c16432,
author = {Song, W and Campen, S and Shiel, H and Gattinoni, C and Zhang, J and Wong, J},
doi = {10.1021/acsami.3c16432},
journal = {ACS Applied Materials and Interfaces},
pages = {14252--14262},
title = {Position of carbonyl group affects tribological performance of ester friction modifiers},
url = {http://dx.doi.org/10.1021/acsami.3c16432},
volume = {16},
year = {2024}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The tribological properties of lubricants can be effectively improved by the introduction of amphiphilic molecules, whose performance is largely affected by their polar head groups. In this work, the tribological performance in steel–steel contacts of two isomers, glycerol monostearate (GMS) and stearyl glycerate (SG), a glyceride and a glycerate, were investigated as organic friction modifiers (OFM) in hexadecane. SG exhibits a much lower friction coefficient and wear than GMS despite their similar structures. The same applies when comparing the performance of oleyl glycerate (OG) and its isomer, glycerol monooleate (GMO). Surface chemical analysis shows that SG forms a polar, carbon-based, tribofilm of around tens of nanometers thick, while GMS does not. This tribofilm shows low friction and robustness under nanotribology test, which may contribute to its superior performance at the macro-scale. The reason for this tribofilm formation can be due to the stronger adsorption of SG on the steel surface than that of GMS. The tribofilm formation can be stress-activated since lower friction and higher tribofilm coverage can be obtained under high load. This work offers insights into the lubrication mechanism of a novel OFM and provides strategies for OFM design.
AU  - Song,W
AU  - Campen,S
AU  - Shiel,H
AU  - Gattinoni,C
AU  - Zhang,J
AU  - Wong,J
DO  - 10.1021/acsami.3c16432
EP  - 14262
PY  - 2024///
SN  - 1944-8244
SP  - 14252
TI  - Position of carbonyl group affects tribological performance of ester friction modifiers
T2  - ACS Applied Materials and Interfaces
UR  - http://dx.doi.org/10.1021/acsami.3c16432
UR  - https://pubs.acs.org/doi/10.1021/acsami.3c16432
UR  - http://hdl.handle.net/10044/1/110268
VL  - 16
ER  -
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