Related Experiment Video
Updated: Apr 9, 2026
13:57
Preparation and Friction Force Microscopy Measurements of Immiscible, Opposing Polymer Brushes
Published on: December 24, 2014
14.4K
A Multi-scale Interfacial Investigation of Organic Friction Modifiers in Hydrocarbon
David Burgess1,2, Peter J Fryer1, Ian McRobbie2
1School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, UK.
Tribology Letters
|April 8, 2026
Summary
Organic Friction Modifiers (OFMs) lubrication performance depends on solvent composition and molecular properties. Water presence significantly impacts OFM lubrication, linking molecular behavior to macroscopic tribological results.
Area of Science:
- Tribology
- Materials Science
- Surface Chemistry
Background:
- Organic Friction Modifiers (OFMs) are crucial for controlling friction and wear in various mechanical systems.
- Understanding the molecular basis of OFM performance is essential for designing advanced lubricants.
Purpose of the Study:
- To correlate molecular characteristics of Organic Friction Modifiers (OFMs) with their lubrication performance.
- To investigate the influence of functional groups and solvents on the tribological properties of model OFMs.
Main Methods:
- Multi-scale study employing model OFMs: palmitic acid and pentadecylamine.
- Analysis of surface adsorption, interfacial adhesion force, adsorption kinetics, and surface coverage.
- Macroscopic tribological testing to evaluate friction and wear.
Main Results:
- Solvent composition profoundly affects OFM surface adsorption and interfacial adhesion.
- Water presence in hydrocarbon solvents significantly impacts OFM lubrication performance.
- Quantitative correlation established between molecular properties (binding force, adsorption kinetics) and macroscopic tribological results.
Conclusions:
- Static Coefficient of Friction (COF) is governed by thermodynamic equilibrium film properties.
- Dynamic COF relates to interfacial forces during sliding.
- Wear is linked to the OFM's re-adsorption ability after removal.
Related Concept Videos
02:56Intermolecular Forces and Physical Properties
29.9K
29.9K
01:30Dry Friction
1.2K
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible.
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
1.2K
01:07Frictional Force
10.8K
When a body is in motion, it encounters resistance because the body interacts with its surroundings. This resistance is known as friction, a common yet complex force whose behavior is still not completely understood. Friction opposes relative motion between systems in contact, but also allows us to move. Friction arises in part due to the roughness of surfaces in contact. For one object to move along a surface, it must rise to where the peaks of the surface can skip along the bottom of the...
10.8K
02:34Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
53.7K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
53.7K
01:21Characteristics of Dry Friction
1.1K
Dry friction occurs when two solid surfaces slide against each other without any lubrication or fluid present. It causes resistance when pushing objects along a surface, like a gardener pushing a wheelbarrow. The force applied to move the cart causes dry friction between the wheel and the ground.
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
Before the wheelbarrow starts moving, the static frictional force acts tangentially to the contact surface, opposing the force that is about to induce the motion. This frictional force prevents the...
1.1K
01:27Surface Active Agents
126
Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
126