Fabrication and analysis of enforced dry adhesives with core-shell micropillars
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- Fabrication and analysis of enforced dry adhesives with core-shell micropillars
- Bae, Won-Gyu; Kwak, Moon Kyu; Jeong, Hoon Eui; Pang, Changhyun; Jeong, Hakgeun; Suh, Kahp-Yang
- Adhesion forces; Beam deflection; Core-shell; Dry adhesive; Micro-pillars; Polyurethane acrylates; SIMPLE method; Theoretical models; Thin layers
- Issue Date
- ROYAL SOC CHEMISTRY
- SOFT MATTER, v.9, no.5, pp.1422 - 1427
- We present a simple method for fabricating robust dry adhesives by coating a soft polydimethyl siloxane (PDMS) thin layer on rigid backbone micropillars of polyurethane acrylate (PUA). These core-shell type micropillars demonstrated enhanced durability both in normal and shear adhesion over more than 100 cycles of attachment and detachment. Relatively strong normal (∼11.4 N cm -2) and shear (∼15.3 N cm-2) adhesion forces were observed, which were similar to or even larger than those of homogeneous PDMS micropillars. A simple theoretical model based on beam deflection theory was used to explain the experimental results.
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