Pitcher plants have liquid-infused structured surfaces to slip and digest insects, which have oily surfaces on their body, inside of their pods. By mimicking the slipping mechanism of pitcher plant pods, the omniphobic slippery surface has been created by infusing liquid lubricants into porous materials.
We have reported honeycomb-patterned porous films can be prepared by casting polymer solution under humid conditions. By using condensed water droplets onto the surface of cast solutions of polymers as templates, uniformly sized pores were formed on the polymer films after evaporation of solvent and template water droplets. By peeling the top layer of honeycomb films with adhesive tape, the pincushion-like surface structure can be created. This pincushion surface has high water repellency due to their high surface porosity and hydrophobic nature. By infusing lubricants into the pincushion film, omniphobic slippery surfaces can be prepared. When fluorinated lubricants infuse into fluorinated pincushion film, they slip both oil and water droplets with inclined the film only a few angle. Furthermore, the motion of sliding liquids can be controlled by stretching of the film or surface patterning.
In the presentation, we will show the biomimetic liquid repellent surfaces based on self-organized honeycomb films. Moreover, other applications of honeycomb films for stretchable electrodes for epidermal sensing and on-demand separation systems.
Hiroshi Yabu and Jun Kamei, "Biomimetic liquid repellent surfaces based on self-organized honeycomb-patterned polymer films (Conference Presentation)," Proc. SPIE 10162, Bioinspiration, Biomimetics, and Bioreplication 2017, 101620Q (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 27, 2017; Published: 10 May 2017); https://doi.org/10.1117/12.2257397.5427096903001.
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