Large-sized superhydrophobic conical column array capable of achieving cake-shaped bounce of droplet

Abstract

The invention belongs to the technical field of functional materials, and provides a large-sized superhydrophobic conical column array capable of achieving the cake-shaped bounce of a droplet. The superhydrophobic conical column array is of a structure with the thick lower portion and the thin upper portion, the bottom diameter is D, the bottom spacing is S, the height of conical columns is H, theshape angle of the conical columns is beta, and the D, S, H and beta meet the conditions respectively that the D is greater than or equal to 180 microns and smaller than or equal to 1,260 microns, the S is smaller than or equal to 290 microns, the H is greater than or equal to 500 microns and smaller than or equal to 2,000 microns, and the beta is greater than or equal to 139 degrees and smallerthan or equal to 180 degrees; the contact angle between the superhydrophobic conical column array and the water droplet is greater than or equal to 160 degrees, and the rolling angle between the superhydrophobic conical column array and the water droplet is smaller than or equal to 10 degrees. The novel superhydrophobic conical column array capable of achieving the cake-shaped bounce of the droplet and shortening the liquid-solid contact time by about 60% and with the shape angle beta is provided and has the large bottom diameter, a low height-diameter ratio, a large size range and high 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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