Rheological properties of skin components under compressive load.

Area of Science:

• Biomaterials Science
• Dermatology
• Materials Engineering

Background:

• Skin's mechanical properties are vital for its function.
• Major components include collagen, elastin, chondroitin sulfate, and hyaluronic acid.
• Understanding these components' behavior under stress is essential.

Purpose of the Study:

• To characterize the mechanical properties of major skin components under compression.
• To relate compression behavior to hydration levels.
• To investigate the viscoelastic and rubber-like properties of these biomaterials.

Main Methods:

• Compression testing of collagen, elastin, chondroitin sulfate, and hyaluronic acid in a gel matrix.
• Measurements conducted at 14°C, 21°C, and 25°C.
• Analysis based on theoretical work by Bert et al. and Aubert's finite deformation theory.

Main Results:

• Skin components were characterized for mechanical properties under compression.
• Pressure vs. hydration relationships were established.
• Collagen, elastin, and chondroitin sulfate demonstrated viscoelastic responses.
• Hyaluronic acid and gelatin exhibited rubber-like behavior.

Conclusions:

• The study provides insights into the distinct mechanical behaviors of major skin components.
• Findings are applicable to models of skin biomechanics.
• Different components display unique responses (viscoelastic vs. rubber-like) under compression and hydration changes.