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Lecture

Anti-icing approach inspired from penguin's feather structure

Monday (19.03.2018)
16:00 - 16:20
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Antarctic, on average, is the coldest and windiest continent in the world, where lowest recorded temperature is -89 degree and suffered many blizzards throughout the year. Although the severe environment, dozens of penguin species were found in here due to their high adaptation. They daily dive in water at sub-freezing temperature but it was confirmed that no one had never observed ice or frost on the feather of a healthy penguin. It was discovered that the feather structure contains innumerable tiny pores that working as the air trap to block the heat transfer through condensed droplet. In addition, penguins apply the preen oil produced by a gland to the feather continuously using their beak. The combination of hierarchical structure and oil will make the feather very slippery and super water repelling.

Inspired from the unique of penguin feather, we proposed an approach to minimize icing adhesion condensed on a surface by the combination of poor thermal conductivity material and low surface tension oil. Hierarchical of oil-infused PDMS textures was fabricated using a master template and plasma etching in order to minimize projected contact area with condensed droplet for restraint heat transfer. Different concentration of oil in PDMS solution was tested to show the contribution of slippery in removing ice droplet after icing process. The textured surfaces present ultra-low adhesion strength with ice droplet compares to several common materials and approximately linear with the concentration of oil infusion in PDMS solution. The results can be used for understanding of anti-icing phenomena and introducing a facile approach for icephobic surface.

 

Speaker:
Dipl.-Ing. Nguyen Thanh-Binh
University of Science and Technology
Additional Authors:
  • Prof. Hyuneui Lim
    Korea Institute of Machinery and Materials/University of Science and Technology - Korea