2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 11: New and Advanced Materials, Technologies, and Manufacturing

Editors:F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna
Publisher:Flogen Star OUTREACH
Publication Year:2019
Pages:174 pages
ISBN:978-1-989820-10-0
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Bioinspired Materials with Micro and Nanostructured Gradient Surfaces to Control Dynamic Wettability

    Yongmei Zheng1;
    1BEIHANG UNIVERSITY, Beijing, China;
    Type of Paper: Invited
    Id Paper: 77
    Topic: 43

    Abstract:

    Biological surfaces in nature (e.g., spider silk, cactus spine, beetle back, butterfly wing, lotus leaf, etc.) have inspired us to design functional materials and surfaces [1-5]. Inspired by the structures of spider silk for directional water collecting ability, a series of bioinspired gradient fibers has been designed by integrating fabrication methods and technologies, e.g., dip-coating, Rayleigh instability break-droplets, electrospinning, and wet-assembly, etc.. Thus, this allows roughness and curvature, gradient spindle-knots, a star-shape wettable pattern, etc. for droplet transport and harvesting. Inspired by cactus spines, the conical spines with periodic roughness or micro- and nanostructures can achieve high-efficiency condensed-droplet transport. Some dynamic gradient surfaces are also designed, e.g., photo-thermal organogel surfaces for control of droplet transport in various routes via light radiation, and magnetic-induced dynamic tilt-angle pillar array for driving of the droplet shedding-off in directions. The bioinspired gradient surfaces can be further designed to exhibit robust transport and control of droplets. These bioinspired gradient surfaces would be promising applications into anti-icing, liquid transport, anti-fogging/self-cleaning, water harvesting, etc.

    Keywords:

    Nanocomposites; New and advanced materials;

    References:

    [1] Zheng. Y. Bioinspired wettability surfaces: Development in micro- and nanostructures, Pan Stanford Publishing. 2015, 0-216.
    [2] Zheng, Y. et al., Directional water collection on wetted spider silk, Nature 2010, 463, 640-463.
    [3] Xu, T. et al., High-efficiency fog collector: water unidirectional transport on heterogeneous rough conical wires. ACS Nano 2016, 10, 10681-10688.
    [4] C Gao, et al., Droplets Manipulated on Photothermal Organogel Surfaces. Adv. Funct. Mater. 2018, 1803072.
    [5] Y. Lin, et al., Magnetically Induced Low Adhesive Direction of Nano/ Micropillar Arrays for Microdroplet Transport. Adv. Funct. Mater. 2018, 1800163.

    Cite this article as:

    Zheng Y. (2019). Bioinspired Materials with Micro and Nanostructured Gradient Surfaces to Control Dynamic Wettability. In F. Kongoli, F. Marquis, N. Chikhradze, T. Prikhna (Eds.), Sustainable Industrial Processing Summit SIPS2019 Volume 11: New and Advanced Materials, Technologies, and Manufacturing (pp. 45-56). Montreal, Canada: FLOGEN Star Outreach