Complex Wettability and Self-Cleaning Performance of Butterfly Wing Surface

Yan Fang; Gang Sun

doi:10.4028/www.scientific.net/AMM.723.943

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 723Complex Wettability and Self-Cleaning Performance...

Complex Wettability and Self-Cleaning Performance of Butterfly Wing Surface

Abstract:

The microstructure, hydrophobicity and chemical composition of butterfly wing surfaces were investigated by a scanning electron microscope (SEM), a video-based contact angle meter, and a Fourier transform infrared spectrometer (FT-IR). Using CaCO₃particle as simulated pollutant, the self-cleaning performance of the wing surface was measured. The wing surfaces possess complicated micro/nanostructures. According to the large contact angles (140.2~156.9°) and small sliding angles (1~3°) of water droplet, the butterfly wing surface is of high hydrophobicity and low adhesion. The average rate of CaCO₃ pollution removal from the wing surface is as high as 86.2%. There is a good positive correlation (r=0.89) between pollution removal rate and roughness index of the wing surface. The coupling effects of hydrophobic material and rough microstructure contribute to the special complex wettability and remarkable self-cleaning property of the wing surface. Butterfly wing can be used as a template for design of superhydrophobic surface and self-cleaning material. This work may offer inspirations for biomimetic fabrication of novel interfacial material with multi-functions.

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Periodical:

Applied Mechanics and Materials (Volume 723)

Pages:

943-947

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.723.943

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Online since:

January 2015

Authors:

Yan Fang, Gang Sun*

Keywords:

Biomaterials, Butterfly Wing, Self-Cleaning, Superhydrophobicity, Wettability

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* - Corresponding Author

References

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