Casting machining method for liquid droplet cake-shaped bouncing large-size super-hydrophobic cylindrical array

Abstract

The invention provides a casting machining method for a liquid droplet cake-shaped bouncing large-size super-hydrophobic cylindrical array. The method includes the steps that a casting die is prepared, wherein a metal matrix array blind hole structure with the diameter ranging from 0.8 mm to 1.25 mm, the cylinder distance being 0.25 mm and the depth ranging from 0.6 mm to 1.0 mm is machined, and the casting die is obtained after polishing, cleaning and drying; casting curing is conducted, wherein a mixed polymer solution is used for casing the casting die which is cleaned and dried, and curing treatment is conducted; die taking is conducted, wherein the polymer cylindrical array is obtained through direct die releasing; and super-hydrophobic treatment is conducted, wherein spraying treatment is conducted on the obtained cylindrical array, the super-hydrophobic cylindrical array is obtained, and a mixed solution is a fluoroalkyl silane ethanol solution containing nano TiO2 particles. The casting machining method has the beneficial effects of being simple, easy to operate and low in cost, selectable material kinds are multiple, materials and templates can be repeatedly used, and the size of the prepared cylindrical array is large; and large-area and industrial machining of liquid droplet cake-shaped bouncing surfaces can be effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of micromachining, and relates to a pouring processing method of a large-size superhydrophobic cylinder array capable of realizing liquid drop cake bounce. Background technique [0002] Freezing rain is a common phenomenon in nature, but it is very easy to adhere to solid surfaces to freeze and cause damage to human production and life. For example, freezing rain attached to transmission lines can easily cause power outages; freezing rain attached to roads can easily reduce the friction between pedestrians and cars. Increase traffic accidents; freezing rain attached to the wings will reduce the lift of the aircraft and increase flight resistance, and serious crashes will also occur. The harm of freezing rain forces people to find effective ways to reduce its adhesion to solid surfaces. The superhydrophobic surface has attracted the attention of researchers due to its high contact angle and low rolling angle...

AI Technical Summary

Problems solved by technology

The superhydrophobic cone and square column arrays developed by Liu et al. have a diameter of about 20 μm to 100 μm and a height of about 800 μm to 1200 μm. Due to the small diameter and high aspect ratio of this type of structure, currently only the wire electric discharge method can be used. processed out

However, the efficiency of EDM is too low, and it takes 7 to 8 hours to process a 2cm×2cm sample, making it difficult to realize industrialized large-scale processing

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