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Tribology Letters

, 68:11 | Cite as

Correlation Between the Adsorption and the Nanotribological Performance of Fatty Acid-Based Organic Friction Modifiers on Stainless Steel

  • Zita Zachariah
  • Prathima C. Nalam
  • Amogha Ravindra
  • Archana Raju
  • Anupama Mohanlal
  • Kaiyu Wang
  • R. Veronica Castillo
  • Rosa M. Espinosa-MarzalEmail author
Original Paper
  • 53 Downloads

Abstract

Surface adsorption of amphiphilic molecules is a vital mechanism of boundary lubrication on stainless steel surfaces. The self-assembly of four fatty acid-based organic friction modifiers in two alkane solvents and their adsorption onto stainless steel surfaces was investigated using Dynamic Light Scattering and Quartz Crystal Balance with Dissipation, respectively. These properties were related to the friction force between a sharp tip and the steel surface measured using Lateral Force Microscopy. The molecular structures of the organic friction modifiers were chosen in order to study the effects of unsaturation and number of alkyl chains as well as the composition of the polar head groups on their assembly in solution, adsorption, and nanotribological behavior. Sorbitan monooleate and dioleate adsorb as monolayers with their alkyl chains either in the upright or tilted configuration, depending on their concentration. If large supramolecular structures were present in the solvent, i.e., for sorbitan monolaurate and glycerol monooleate, micelle adsorption and rearrangement on the surface and multilayer formation took place, respectively. A correlation between the adsorption rate constant and the coefficient of friction of the organic friction modifiers was revealed in these studies, with the coefficient of friction decreasing with an increase in the adsorption rate.

Graphic Abstract

Keywords

Carboxylic acid derivative Organic friction modifier Boundary lubrication Quartz crystal microbalance Atomic force microscopy 

Notes

Acknowledgements

This project was supported by TOTAL MS under TOTAL-UIUC collaboration (Research agreement U15-012 PC15-039). The authors gratefully acknowledge Benoît Thiébaut and Sophie Loehle at Total M&S, Solaize Research Center (CRES), France for the useful discussions.

Supplementary material

11249_2019_1250_MOESM1_ESM.docx (65.8 mb)
Supplementary file1 (DOCX 67340 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Civil and Environmental EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  2. 2.TOTAL MARKETING SERVICES - Centre de Recherche de Solaize - Chemin du CanalSolaizeFrance
  3. 3.Department of Materials Science and EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  4. 4.Max-Planck-Institut für Eisenforschung GmbHDüsseldorfGermany
  5. 5.Department of Materials Design and InnovationUniversity at BuffaloBuffaloUSA

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