Stretchable super-hydrophobic surface material and preparation method thereof

A technology of super-hydrophobic surface and substrate surface, which can be used in the fields of waterproof, stretchable devices, and self-cleaning, and can solve the problems of high price, unenvironmental protection, and unsuitable for mass production.

Active Publication Date: 2021-04-20
PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation methods of flexible and stretchable superhydrophobic materials are cumbersome, or the preparation conditions are harsh, or they are not suitable for large-scale production.
In addition, the preparation process of most superhydrophobic materials requires the use of fluoride to reduce the surface energy, which is not only expensive but also not environmentally friendly.

Method used

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  • Stretchable super-hydrophobic surface material and preparation method thereof
  • Stretchable super-hydrophobic surface material and preparation method thereof
  • Stretchable super-hydrophobic surface material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of a stretchable superhydrophobic surface material:

[0035] (1) Mix the body of polydimethylsiloxane silica gel and the crosslinking agent together at a mass ratio of 10:1 to obtain polydimethylsiloxane silica gel prepolymer, and then coat 2g of the prepolymer Apply evenly on the outer surface of the plastic culture dish (round shape, 90mm in diameter) to obtain an uncured polydimethylsiloxane coating;

[0036] (2) Baking on the candle flame to obtain the candle soot layer: place the plastic Petri dish coated with uncured polydimethylsiloxane silica gel above the candle flame, so that the uncured polydimethylsiloxane The alkane coating is close to the flame side of the candle and covers 1 / 3-1 / 2 of the flame height when the candle is naturally burning. Move the plastic petri dish coated with polydimethylsiloxane to make the polydimethylsiloxane The surface of the coating is uniformly covered with candle soot until the thickness of the candle soot layer is 2...

Embodiment 2

[0039] Preparation of a stretchable superhydrophobic surface material:

[0040] (1) liquid nitrile rubber can be used directly, 0.5g liquid nitrile rubber is evenly coated on the glass surface (rectangular, 25mm*75mm), obtains uncured nitrile rubber coating;

[0041] (2) Baking on the candle flame to obtain the candle ash layer: place the glass piece coated with uncured nitrile rubber coating above the candle flame, make the uncured nitrile rubber coating close to the side of the candle flame and cover 1 / 3-1 / 2 of the flame height when the candle burns naturally, move the glass sheet coated with nitrile rubber to make the surface of the nitrile rubber coating evenly covered with candle soot, the thickness of the candle soot layer is 5μm, D The nitrile rubber coating will cure under the heat of the candle flame to form a nitrile rubber film;

[0042] (3) The nitrile rubber film with candle soot attached to the surface is peeled off from the glass sheet to obtain a stretchable s...

Embodiment 3

[0044] Preparation of a stretchable superhydrophobic surface material:

[0045] (1) The body of the liquid isoprene rubber and the crosslinking agent are combined in a mass ratio of 100:3 to obtain the isoprene rubber prepolymer, and 0.5 g of the prepolymer is evenly coated on the surface of the glass sheet (rectangular , 25mm*75mm), to obtain uncured isoprene rubber coating;

[0046] (2) Bake the candle soot layer on the candle flame: place the glass piece coated with uncured isoprene rubber coating above the candle flame, make the uncured isoprene rubber coating close to the side of the candle flame and cover it. 1 / 3-1 / 2 of the flame height when the candle burns naturally, move the glass sheet coated with isoprene rubber to make the surface of the mixed prepolymer evenly covered with candle soot, the thickness of the candle soot layer is 10μm, isoprene rubber The coating will cure under the heat of a candle flame to form a film of isoprene rubber;

[0047] (3) The isoprene...

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Abstract

The invention generally belongs to the technical field of self-cleaning, waterproof and stretchable devices, and provides a stretchable super-hydrophobic surface material which comprises a flexible film layer and a candle ash layer on at least one of the upper surface and the lower surface of the flexible film layer. The flexible thin film layer is a thin film layer formed by a thermosetting elastic polymer; the thickness of the flexible film layer ranges from 100 microns to 500 microns; and the thickness of the candle ash layer is 2-10 microns. The preparation method is simple (the candle soot layer is obtained by moving and baking on the burning candle flame), special equipment is not needed, the price is low, the environment is protected, the candle soot coating is prepared on the thermocuring rubber film, the rubber film is cured under the action of heat, and part of film molecules permeate among candle soot particles; the adhesion of the candle soot particles is enhanced, so the appearance of the candle soot layer cannot be damaged in the stretching process, and the film can still keep excellent super-hydrophobic performance in the stretching process.

Description

technical field [0001] The invention generally belongs to the technical field of self-cleaning, waterproof and stretchable devices, and in particular relates to a stretchable superhydrophobic surface material and a preparation method thereof. Background technique [0002] The superhydrophobic surface is a new type of material that is repellent to water. Water droplets cannot spread on the surface and keep a spherical rolling shape. The contact angle of water on the surface is greater than 150°, and the rolling angle is generally less than 10°. Superhydrophobic surfaces have a wide range of applications in the fields of waterproofing, anti-icing, anti-fog, self-cleaning, and corrosion resistance. [0003] The structure of the superhydrophobic surface needs to meet two conditions. One is to have a rough surface morphology with micron and nanometer layers, and the other is to have a low surface energy. These two factors make the apparent contact angle of water greater than 150°...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J7/06C08J7/04C08J7/00C08L83/04C08L9/02C08L9/00
Inventor 任武荣姚宏林钟文丽
Owner PLA PEOPLES LIBERATION ARMY OF CHINA STRATEGIC SUPPORT FORCE AEROSPACE ENG UNIV
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