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Processing method of drop cake-shaped bounce large-size super-hydrophobic cone column array

A processing method and large-scale technology, applied in metal processing equipment, manufacturing tools, laser welding equipment, etc., can solve the problems of low processing efficiency, inability to process superhydrophobic cone-column arrays in large quantities for a long time, poor strength and durability, etc. The effect of large processing size, easy large area processing and low cost

Active Publication Date: 2019-08-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the whole, although the above processing methods can all produce superhydrophobic pyramid arrays, the processing efficiency of the Liu et al. Polymers have poor strength and durability, and cannot process superhydrophobic pyramidal arrays in large quantities for a long time

Method used

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  • Processing method of drop cake-shaped bounce large-size super-hydrophobic cone column array
  • Processing method of drop cake-shaped bounce large-size super-hydrophobic cone column array
  • Processing method of drop cake-shaped bounce large-size super-hydrophobic cone column array

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Experimental program
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Effect test

Embodiment

[0023] Using the mold replication method to process large-scale superhydrophobic cone-column arrays with droplet cake bounce, such as figure 1 As shown, the specific method is as follows:

[0024] (1) Mold processing: remove the protective film on the surface of the 1060 aluminum plate, adjust the laser so that its focus is on the surface of the aluminum plate; draw a 5×5 circular array with a diameter of 0.8mm and a center distance of 1.0mm, and set the laser processing power to 24W and scanning speed 100mm / s, frequency 20kHz, and 60 strikes for marking processing; then placed in 0.4mol / L HCl solution for etching for 2min, then ultrasonically cleaned with deionized water, and dried;

[0025] (2) Casting and curing: mix the PDMS main agent and cross-linking agent evenly at a mass ratio of 10:1, pour the prepared casting mold, and perform defoaming treatment in a vacuum environment, and cure at 70°C for 4 hours; directly demould to obtain PDMS Array of cones.

[0026] (3) Low...

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Abstract

The invention provides a processing method of a drop cake-shaped bounce large-size super-hydrophobic cone column array. The processing method comprises the following steps: processing a preparation mold: setting a nanosecond laser processing parameter, processing cone hole array molds with the diameter being 180 to 1260 microns, the separation distance being less than or equal to 290 microns and the height being 500 to 2000 microns on a metal base plate, etching, cleaning and blow-drying to obtain a pouring mold; performing curing treatment and directly demolding to obtain a polymer cone column array; and performing low surface energy modification on the obtained polymer cone column array by adopting a fluoro-alkyl silane or stearic acid solution to obtain the super-hydrophobic cone columnarray. The method has the advantages that the method is simple, easy to operate and low in cost; materials and templates can be reused; the prepared cone column array is large in size and wide in range and has stable super-hydrophobic property; and the prepared super-hydrophobic cone column array can enable the liquid-solid contact time to be reduced by 60 percent and can effectively drop cake-shaped bounce and prevent the occurrence of an icing phenomenon.

Description

technical field [0001] The invention belongs to the technical field of microfabrication, and relates to a method for processing liquid drop cake-like bouncing large-size superhydrophobic cone column arrays. Background technique [0002] Freezing rain is a common phenomenon in nature, and it is very easy to adhere and freeze on solid surfaces, causing damage to human production and life. Previous studies have found that droplets falling on the superhydrophobic cone-pillar array can produce a cake-like bouncing phenomenon, which can significantly shorten the liquid-solid contact time and effectively avoid the occurrence of icing. Due to its great application value in anti-freezing rain and anti-icing, superhydrophobic cone-column arrays have gradually become a research hotspot for researchers. [0003] In 2014, Liu et al. of City University of Hong Kong used wire electric discharge cutting and chemical etching to prepare a copper matrix superhydrophobic straight cone array wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C23F1/16B23K26/382C08L83/04
CPCB23K26/382C08J7/12C08J2383/04C23F1/16
Inventor 宋金龙赵长林黄柳孙玉文
Owner DALIAN UNIV OF TECH
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