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Bionic super-spreading surface and preparation method thereof

A technology of super-spreading and surface structure, applied in the field of super-hydrophilic materials, can solve the problem that droplets cannot have rapid spreading and large-area spreading performance at the same time, and achieve the effect of simple preparation method, wide application and wide selection

Active Publication Date: 2022-03-04
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to overcome the above-mentioned defects that the droplets on the super-spreading surface cannot have rapid spreading and large-area spreading performance at the same time, and improve the evaporation rate of the droplets on the surface , which in turn has a significant cooling effect; based on the study of the spreading behavior of droplets on the leaves of the tropical herb plant Amurium, imitating the microstructure of the surface of natural plant leaves, a micron raised structure closely arranged in a honeycomb structure is extracted , enabling micro-droplets to spread non-directionally and quickly over the entire surface to a large area

Method used

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  • Bionic super-spreading surface and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0049] A method for preparing a bionic superspread surface, comprising the following steps:

[0050] (1) Using 3D printing method to prepare the basic model imitating the surface of natural reed grass;

[0051] (2) Replicate the model to obtain a reverse template. The specific preparation method is: mix the polydimethylsiloxane prepolymer and the curing agent two-component glue used with it in a mass ratio of 10:1 Mix evenly to obtain a mixed glue solution, which is subjected to 60W ultrasonic treatment for 10 min and 10 min -3 Vacuumize the mixed glue solution for 10 minutes under the condition of Pa vacuum to remove bubbles, then pour the mixed glue solution over the template, and pass through the 10 minutes again. -4 Vacuumize for 25 minutes under Pa vacuum to remove foam, and then cure at 65°C for 2 hours to obtain a polydimethylsiloxane reverse template;

[0052] (3) Put the polydimethylsiloxane anti-template obtained in step (2) in a plasma processor, and discharge the...

Embodiment 2

[0058] A method for preparing a bionic superspread surface, comprising the following steps:

[0059] (1) Using 3D printing method to prepare the basic model imitating the surface of natural reed grass;

[0060] (2) Replicate the model to obtain a reverse template. The specific preparation method is: mix the polydimethylsiloxane prepolymer and the curing agent two-component glue used with it in a mass ratio of 10:1 Mix evenly to obtain a mixed glue solution, which is subjected to 60W ultrasonic treatment for 10 min and 10 min -3 Vacuumize the mixed glue solution for 10 minutes under the condition of Pa vacuum to remove bubbles, then pour the mixed glue solution over the template, and pass through the 10 minutes again. -4 Vacuumize for 25 minutes under Pa vacuum to remove foam, and then cure at 65°C for 2 hours to obtain a polydimethylsiloxane reverse template;

[0061] (3) Put the polydimethylsiloxane anti-template obtained in step (2) in a plasma processor, and discharge the...

Embodiment 3

[0067] A method for preparing a bionic superspread surface, comprising the following steps:

[0068] (1) Using 3D printing method to prepare the basic model imitating the surface of natural reed grass;

[0069] (2) Replicate the model to obtain a reverse template. The specific preparation method is: mix the polydimethylsiloxane prepolymer and the curing agent two-component glue used with it in a mass ratio of 10:1 Mix evenly to obtain a mixed glue solution, which is subjected to 60W ultrasonic treatment for 10 min and 10 min -3 Vacuumize the mixed glue solution for 10 minutes under the condition of Pa vacuum to remove bubbles, then pour the mixed glue solution over the template, and pass through the 10 minutes again. -4 Vacuumize for 25 minutes under Pa vacuum to remove foam, and then cure at 65°C for 2 hours to obtain a polydimethylsiloxane reverse template;

[0070] (3) Put the polydimethylsiloxane anti-template obtained in step (2) in a plasma processor, and discharge the...

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Abstract

The invention discloses a bionic super-spreading surface and a preparation method thereof, and belongs to the technical field of super-hydrophilic materials, the surface is provided with a micron bulge structure, the bulges are closely arranged on the surface in a honeycomb structure manner, the bottom surface of the bulge structure is a polygon with the number of sides not less than 6, and the bulge structure finally becomes a circle along with the increase of the number of the sides; the diameter of the structural section of each protruding structure is gradually reduced from the bottom to the top, namely the distance between every two adjacent protrusions is gradually increased from the bottom to the top. The method is inspired by a microstructure on a natural ruellia grass leaf, a complex natural plant surface is optimized into a simple structure, and an artificial surface is prepared; and the obtained surface has more excellent super-spreading performance, and has super-high spreading speed and super-large spreading area. According to the bionic super-spreading surface, liquid on the surface can be rapidly evaporated, the surface has a very remarkable cooling effect, and the bionic super-spreading surface can be used in a heat dissipation system of electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of super-hydrophilic materials, and in particular relates to a bionic super-spreading surface and a preparation method thereof. Background technique [0002] Super-hydrophilic surface, as a special wetting surface, is ubiquitous in nature, daily life and industrial processes, and is essential, such as the directional delivery of water / inorganic salts in plant channels, the spraying of pesticides on leaves, underground Crude oil extraction, etc. In the research process of super-hydrophilic surfaces, people introduce more complex structures on the surface to further increase the spreading rate of liquid on the surface and further increase the spreading area, thus preparing a super-spreading surface, which can be widely used in Inkjet printing, biomedical analysis, cooling of electronic devices, desalination of sea water, oil recovery, etc. Introduce nanoporous structure: use titanium dioxide sol to modify na...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08L83/04
CPCC08J7/123C08J7/12C08J2383/04
Inventor 鞠婕刘岚王静生罗玉琼高鑫雨焦俊荣
Owner HENAN UNIVERSITY