| 초록 |
The efforts to learn and take inspiration from nature have proven successful in a wide range of areas. The nanoparticles in the beetle’s wing interlocking system have been studied with the enhancement of wet adhesion forces. Here, we report that beetles-inspired nano-particle embedded polymer fibers can be exploited to form reversible dry/wet interlocker based on van der Waals force-assisted binding and micro-capillary bridges. The hierarchical scale of nano-micro pillars are fabricated by silica nanoparticles and polyurethane acrylate with a simple molding technique. To investigate the effect of nanoparticles, we measured adhesion forces in various conditions by changing relative humidity (RH) from 10 % to 100 %. At RH of 70%, the shear adhesion force is dramatically increased up to 45 N/cm2 due to the formation of micro-capillary bridges between hairs. In addition, we investigated the mechanism of wet adhesion in terms of the increase of micro-capillary bridges between hairs. |
