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

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 S...

Full description

Saved in:
Bibliographic Details
Published in:Tribology letters 2020-03, Vol.68 (1), p.1-16, Article 11
Main Authors: Zachariah, Zita, Nalam, Prathima C., Ravindra, Amogha, Raju, Archana, Mohanlal, Anupama, Wang, Kaiyu, Castillo, R. Veronica, Espinosa-Marzal, Rosa M.
Format: Article
Language:English
Subjects:
Adsorption
Alkanes
Boundary lubrication
Chemistry and Materials Science
Coefficient of friction
Corrosion and Coatings
Fatty acids
Friction
Lubrication
Materials Science
Micelles
Multilayers
Nanotechnology
Original Paper
Photon correlation spectroscopy
Physical Chemistry
Product design
Quartz crystals
Self-assembly
Solvents
Stainless steel
Stainless steels
Surface chemistry
Surfaces and Interfaces
Theoretical and Applied Mechanics
Thin Films
Tribology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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
ISSN:1023-8883
1573-2711
DOI:10.1007/s11249-019-1250-z