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A processing method for droplet cake-like bouncing large-scale superhydrophobic 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 inability to process super-hydrophobic cone-column arrays in large quantities for a long time, poor strength and durability, and low processing efficiency. Ease of large-area processing, large processing size, and low cost

Active Publication Date: 2021-11-05
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A processing method for droplet cake-like bouncing large-scale superhydrophobic cone-column array
  • A processing method for droplet cake-like bouncing large-scale superhydrophobic cone-column array
  • A processing method for droplet cake-like bouncing large-scale superhydrophobic cone-column array

Examples

Experimental program
Comparison scheme
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 method for processing liquid drop cake-shaped bouncing large-scale superhydrophobic cone-column arrays. Mold processing is prepared: nanosecond laser processing parameters are set, and a metal substrate with a diameter of 180 μm to 1260 μm, a spacing of ≤290 μm, and a height of 500μm ~ 2000μm cone hole array mold, after etching, cleaning and drying, the casting mold is obtained; curing treatment, direct demoulding to obtain the polymer cone column array; the obtained polymer cone column array is made of fluorosilane or stearic acid solution Low surface energy modification is performed to obtain superhydrophobic cone-column arrays. The method of the present invention has the advantages of simple and easy operation, low cost, reusable materials and templates, large size and wide range of the prepared pyramid-column array, and stable superhydrophobic performance. The superhydrophobic pyramid-column array prepared by the present invention can be The liquid-solid contact time is reduced by 60%, which can effectively realize the cake-like bounce of liquid droplets and prevent the occurrence of icing.

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 Patents(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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