A large-scale superhydrophobic cone-pillar array capable of liquid droplet bouncing

Abstract

The invention belongs to the technical field of functional materials, and provides a large-size superhydrophobic cone-column array capable of realizing liquid drop cake-like bouncing. The superhydrophobic pyramid array has a bottom-thick and top-fine structure, the bottom diameter is D, the bottom spacing is S, the height of the pyramid is H, and the shape angle of the pyramid is β, and they satisfy the requirements of 180μm≤D≤1260μm, S≤290μm, and 500μm respectively. ≤H≤2000μm, 139°≤β≤180°; the contact angle of the superhydrophobic cone-column array to water droplets is ≥160°, and the rolling angle is ≤10°. The present invention proposes a new type of superhydrophobic cone-column array with a shape angle β that can realize liquid drop cake-like bounce and reduce the liquid-solid contact time by about 60%. Low ratio, wide size range, good mechanical strength.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and relates to a large-size superhydrophobic cone-column array that can realize liquid drop cake-like bouncing. Background technique [0002] Freezing rain is a common phenomenon in nature. It is very easy to adhere to solid surface and freeze into ice, which will cause damage to human production and life. Therefore, how to reduce the liquid-solid contact time between freezing rain and solid surface so that it can quickly detach from the solid surface, thereby preventing the phenomenon of adhesion and icing, has become a research hotspot for experts and scholars. [0003] The superhydrophobic surface has attracted the attention of researchers due to its large contact angle and low rolling angle. Researchers hope to rely on the characteristics of short liquid-solid contact time and easy roll-off of water droplets hitting the superhydrophobic surface to prevent freezing rain from adher...

AI Technical Summary

Problems solved by technology

However, the bottom diameter of the above-mentioned superhydrophobic straight cone array is small and the aspect ratio is too large, resulting in poor mechanical strength.

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