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Abstract:
Wedge-shaped microstructures mimic the remarkable adhesive capabilities of gecko feet due to their distinct anisotropic characteristics. The ability to control adhesion in these microstructures is particularly advantageous for stable surface grasping. However, their widespread use is hindered by challenges of the precision required in their fabrication. This study introduces an innovative double replica molding procedure fabrication method to produce microwedge adhesives with sharp tip. This method demonstrates the ability to obtain a sharp microwedge adhesive tip that cannot be realized using traditional photolithography or ultra-precision machining techniques in mold casting. The adhesion tests demonstrate that the microwedge adhesive with a sharp tip exhibits excellent surface features alongside enhanced reliability and adhesion strength. Additionally, anisotropic characteristics are demonstrated by loading in preferred and reverse directions, respectively, and the influence of motion parameters on the adhesion was systematically studied. The durability results show that after 600 adhesion-detachment cycles, the normal adhesion and shear load only decrease by 13.7% and 18.7%, respectively. This promising approach for fabricating microwedge with sharp tips, paves the way for effective applications in industrial settings and space exploration.
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JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
ISSN: 0169-4243
Year: 2025
2 . 3 0 0
JCR@2022
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SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 5
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