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Friction Dynamics of Human Skin Treated with Oil under Nonlinear Motion
Yuka Sakata1, Hiroyuki Mayama2, Yoshimune Nonomura1
1Department of Applied Chemistry, Chemical Engineering, and Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University.
Journal of Oleo Science
|February 4, 2024
Summary
Moisturizing human skin with oils like petrolatum or silicone reduces skin friction. Silicone oil also decreased the time delay in friction response, improving skin lubrication and reducing adhesion.
Area of Science:
- Tribology
- Biophysics
- Dermatology
Background:
- Moisturization impacts skin barrier function and mechanical properties, including friction.
- Understanding skin friction dynamics is crucial for various applications, from cosmetics to prosthetics.
Purpose of the Study:
- To evaluate the effects of petrolatum and silicone oil on human skin friction dynamics.
- To investigate how moisturization influences skin's mechanical response to friction.
Main Methods:
- Friction force was measured on human skin using a sinusoidal motion contact probe.
- Skin hydration (corneometer), softness (cutometer), and barrier function (tewameter) were assessed.
- Twenty subjects' upper arm skin was utilized for the study.
Main Results:
- Both petrolatum and silicone oil significantly reduced the frictional force on human skin.
- Silicone oil uniquely decreased the delay time (δ) in friction response.
- Three distinct friction patterns were observed, altered by oil treatment due to lubrication and reduced adhesion.
Conclusions:
- Moisturization with petrolatum or silicone oil effectively reduces skin friction.
- Silicone oil offers additional benefits by altering friction response time, likely enhancing lubrication and reducing adhesion at the contact interface.
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