The Role of Hierarchical Micro-Morphology in the Wetting Property of Moth (Geometrinae) Wing Surface

Gang Sun; Yan Fang

doi:10.4028/www.scientific.net/AMR.1095.651

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 1095The Role of Hierarchical Micro-Morphology in the...

The Role of Hierarchical Micro-Morphology in the Wetting Property of Moth (Geometrinae) Wing Surface

Abstract:

The micro-morphology of the moth wing surface was characterized by a scanning electron microscope (SEM). The contact angle (CA) and sliding angle (SA) of water droplet on the wing surface were measured by an optical CA meter. The wetting mechanism was discussed from the perspective of biological coupling. The moth wing surface is of superhydrophobicity (CA 143~156°) and low adhesion (SA 1~4°), and displays multiple-dimensional rough micro-morphology. The scales play a crucial role in the complex wettability of the wing. The average rate of CaCO₃ pollution removal from the wing surface is as high as 87.3%. There is a positive correlation (R=0.8777) between pollution removal rate and roughness index of the wing. The cooperation of chemical composition and micro-morphology contributes to the special wettability and outstanding self-cleaning performance of the wing. The moth wing can serve as a template for biomimetic design and preparation of novel interfacial material with multi-functions.

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Periodical:

Advanced Materials Research (Volume 1095)

Pages:

651-654

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1095.651

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Online since:

March 2015

Authors:

Gang Sun, Yan Fang

Keywords:

Bio-Material, Bionics, Hydrophobicity, Micro-Morphology, Moth

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