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Updated: Jan 25, 2026

Fabrication Process of Silicone-based Dielectric Elastomer Actuators
Published on: February 1, 2016
Evaluation of silicone elastomers as structural materials for microstructured adhesives.
1Illinois Institute of Technology, Mechanical, Materials and Aerospace Engineering, Chicago, IL 60616, United States of America.
Microstructured adhesives offer superior performance on rough surfaces compared to flat ones. Material properties significantly influence adhesion, with interface toughness becoming critical after microstructurization for enhanced dry adhesive applications.
Area of Science:
- Materials Science
- Adhesion Science
- Surface Engineering
Background:
- Microstructured adhesives, inspired by gecko feet, offer advantages over flat films for real-world applications on uneven or dusty surfaces.
- The optimal material for microstructured dry adhesives remains undetermined due to complex interdependencies between material properties.
Purpose of the Study:
- To evaluate eleven silicone elastomers for use as both flat and microstructured adhesives.
- To identify key material properties influencing the performance of microstructured dry adhesives.
- To compare the adhesion behavior of flat and microstructured elastomers on rough substrates.
Main Methods:
- Analysis of eleven commercially available silicone elastomers.
- Fabrication and testing of both flat and stalk-shaped microstructured adhesive surfaces.
- Measurement of adhesion strength and correlation with material properties (bulk dissipation, interface toughness).
Main Results:
- No correlation was found between the adhesion strength of flat and microstructured adhesives.
- Bulk dissipation is key for flat adhesive strength, while interface toughness dominates for microstructured adhesives.
- Microstructured silicone adhesion strength increases with substrate roughness up to 0.19 μm, unlike flat adhesives.
Conclusions:
- Microstructurization shifts the dominant factor for adhesion from bulk dissipation to interface toughness.
- Surface energy additives can enhance microstructured adhesive performance compared to flat counterparts.
- Microstructured silicone elastomers demonstrate improved adhesion on rough surfaces, a novel finding for stiffer materials.
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