Preparation and characterization of fractal elastomer surfaces

Area of Science:

• Materials Science
• Biomaterials Engineering
• Surface Chemistry

Background:

• Elastomer materials with hierarchical structures and controlled wettability are crucial for developing effective biological surface models.
• Mimicking natural surface properties is key for advanced biomaterials.
• Hierarchical surface topographies can significantly influence material performance.

Purpose of the Study:

• To synthesize urethane and silicone resin elastomers with hierarchical rough surfaces, termed 'fractal elastomers'.
• To investigate the relationship between hierarchical surface structure and material properties like wettability and friction.
• To evaluate the potential of these fractal elastomers as biomimetic materials for artificial skin.

Main Methods:

• Synthesis of fractal elastomers by transferring a fractal surface structure from alkylketene dimer.
• Characterization of the hierarchical surface topography, revealing a multi-level structure of projections.
• Measurement of surface wettability (hydrophobicity) and friction resistance.

Main Results:

• Fractal elastomers exhibited a distinct hierarchical structure with small projections superimposed on larger ones.
• The hierarchical rough structure significantly enhanced the hydrophobicity of the elastomer surfaces.
• A notable decrease in friction resistance was observed on the fractal elastomer surfaces.

Conclusions:

• The developed fractal elastomers possess biomimetic surface properties due to their hierarchical structure.
• Enhanced hydrophobicity and weakened friction resistance make these materials promising for advanced applications.
• These fractal elastomers show significant potential for use in artificial skin with improved biomimetic surface characteristics.