Abstract
Extremely non-wetting (or superhydrophobic) surfaces have promising industrial applications, many of which have been inspired by phenomena observed in biology. Lepidopteran wings are a prime example of such surfaces due to their multiple functionalities, including acoustic defence, structural colouration and self-cleaning ability. This ability is achieved by the highly structured surfaces, and regular tiling patterns of wing scales. However, the scope of research into lepidopteran wettability is limited due to a lack of focus on moth species, despite moths making up such a large proportion of the taxa. Additionally, the effect of impact damage on the functionality of such surfaces has not yet been quantified in lepidoptera. Quantification of the wettability of Attacus moth wings demonstrated strong hydrophobic properties with directional drop shedding capabilities, surpassing the performance of current commercial hydrophobic polymers. Attacus scales also constituted a ‘shatter-coating’ which effectively induced drop shatter, making drop impacts less damaging. However, drop retention and impact resilience demonstrated regional variability. The results of this study reveal Attacus wings as a promising new biomimetic model which could be utilised in studies for the development of effectivemultifunctional superhydrophobic surfaces.
| Date of Award | 10 Dec 2024 |
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| Original language | English |
| Awarding Institution |
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| Supervisor | Marc W Holderied (Supervisor) & Ulrike Bauer (Supervisor) |