Hot-pressing method for processing large-size super-hydrophobic cylindrical array capable of bouncing in droplet and cake shape

Abstract

Provided is a hot-pressing method for processing a large-size super-hydrophobic cylindrical array capable of bouncing in a droplet and cake shape. The method comprises the steps of: preparing a hot-pressing mold, wherein a metal substrate array through-hole structure which has a diameter of 0.8-1.25 mm, column spacing of 0.25 mm, a depth of 0.6-1.0 mm is processed, grinding, washing and blow-drying are conducted on the metal substrate array through-hole structure to obtain the hot-pressing mold; conducting hot pressing, wherein a polymer material is applied to the hot-pressing mold, vacuum hotpressing is conducted on the hot-pressing mold with the polymer material, and the hot-pressing mold with the polymer material is cooled to a room temperature after taken out; removing the mold, wherein after the excessive polymer material flowing out of through holes is cut off, the hot-pressing mold is removed, and a polymer cylindrical array can be obtained; and conducting super-hydrophobic treatment, wherein the obtained cylindrical array is sprayed with a mixed solution to obtain the super-hydrophobic cylindrical array, and the mixed solution is a fluorosilane ethanol solution which contains nano TiO2 particles. The method has the advantages of being simple and easy to operate and low in cost, multiple kinds of materials can be selected, the materials and templates can be reused, andthe size of the prepared cylindrical array is large; besides, industrial processing and large surface of the super-hydrophobic cylindrical array capable of bouncing in the droplet and cake shape canbe effectively realized.

Description

technical field [0001] The invention belongs to the technical field of micromachining, and relates to a hot-pressing processing method of a large-size super-hydrophobic cylinder array capable of realizing liquid drop cake-like bouncing. 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 ...

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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