A Micro-morphological Model for Hydrophobicity on the Locust wing

DOI

10.2991/lemcs-15.2015.121How to use a DOI?

Keywords

Locust wing; Superhydrophobicity; Micro-morphology; Biomimetic; Biological coupling.

Abstract

The hydrophobicity, chemical composition and microstructure of locust wing are investigated by a video-based contact angle (CA) meter, a Fourier transform infrared spectrometer (FT-IR) and a scanning electron microscope (SEM). A micro-morphological model for hydrophobicity of wing surface is established on the basis of Cassie equation. The wetting mechanism is discussed from the perspective of biological coupling. The results show that the locust wing is covered with a waxy layer composed mainly of long chain hydrocarbon, tallate and fatty-acid alcohol. The wing surface displays multiple-dimensional microstructures including primary structure (wing vein grids), secondary structure (regularly arraying micrometric pillar gibbosities), and tertiary structure (nano corrugations). The diameter, height, and spacing of pillar gibbosity are 3.6~9.5 m, 4.1~8.6 m, and 7.2~14.3 m, respectively. Locust wing surface is a natural bio-surface with superhydrophobicity (water contact angle 151.3~158.6°). The superhydrophobic property of locust wing surface ascribes to cooperative effect of hydrophobic material and hierarchical rough microstructure. Locust wing can be potentially used as a biomimetic template for design of special functional surface. This work may bring interesting insights for preparation of micro-controllable superhydrophobic surface.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Gang Sun
AU  - Yan Fang
PY  - 2015/07
DA  - 2015/07
TI  - A Micro-morphological Model for Hydrophobicity on the Locust wing
BT  - Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science
PB  - Atlantis Press
SP  - 629
EP  - 632
SN  - 1951-6851
UR  - https://doi.org/10.2991/lemcs-15.2015.121
DO  - 10.2991/lemcs-15.2015.121
ID  - Sun2015/07
ER  -