Structural color super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating and structural color technology, applied in coatings and other directions, can solve the problems of self-healing performance greatly affected by temperature, no adjustable color, complicated preparation process, etc., and achieve important application value, low cost, Simple and convenient operation

Inactive Publication Date: 2020-03-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional superhydrophobic coatings are mainly constructed using nanoscale multi-level structures and low surface energy substances. However, their nanostructures are easily damaged during use, and it is difficult to meet the requirements of practical applications.
[0004] Patent CN110272683 discloses a method for preparing a wear-resistant superhydrophobic coating. The prepared coating has good superhydrophobic performance, but the preparation process is complicated, and the self-healing performance is greatly affected by temperature, and it does not have an adjustable color. Adding chemical pigment substances can develop color, so the application in coatings, pigments, paints and other fields is limited

Method used

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  • Structural color super-hydrophobic coating and preparation method thereof
  • Structural color super-hydrophobic coating and preparation method thereof
  • Structural color super-hydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 A kind of structural color superhydrophobic paint and coating

[0043] 1. Preparation method

[0044] (1) adding the polystyrene microsphere powder with an average diameter of 150nm into dehydrated alcohol for ultrasonic dispersion, to obtain a microsphere dispersion with a mass fraction of 5%;

[0045] (2) Add 4.5mL tetraethyl silicate and 4mL ammonia water with a mass fraction of 25% to 10mL microsphere dispersion liquid, and react at room temperature for 12 hours to obtain liquid A;

[0046] (3) After centrifuging liquid A to remove the supernatant, dry it at 60°C for 24 hours, and thoroughly grind it evenly to obtain roughened microspheres with an average diameter of 200nm;

[0047] (4) the roughened microspheres obtained in step (3) are mixed uniformly with carbon powder in a mass ratio of 1:0.02;

[0048] (5) Dissolve dimethylsiloxane resin in ethyl acetate (the mass ratio of the two is 1:1) to obtain a dimethylsiloxane resin solution;

[0049] (6)...

Embodiment 2

[0059] Embodiment 2 A kind of structural color superhydrophobic paint and coating

[0060] 1. Preparation method

[0061] (1) The polystyrene microsphere powder that average diameter is 200nm is added dehydrated alcohol and carries out ultrasonic dispersion, obtains the microsphere dispersion liquid that mass fraction is 5%;

[0062] (2) Add 4.5mL tetraethyl silicate and 4mL ammonia water with a mass fraction of 25% to 10mL microsphere dispersion liquid, and react at room temperature for 12 hours to obtain liquid A;

[0063] (3) After centrifuging liquid A to remove the supernatant, dry it at 60°C for 24 hours, and thoroughly grind it evenly to obtain roughened microspheres with an average diameter of 250nm;

[0064] (4) the roughened microspheres obtained in step (3) are mixed uniformly with carbon powder in a mass ratio of 1:0.02;

[0065] (5) Dissolve dimethylsiloxane resin in ethyl acetate (the mass ratio of the two is 1:5) to obtain a dimethylsiloxane resin solution;

...

Embodiment 3

[0071] Embodiment 3 A kind of structural color superhydrophobic paint and coating

[0072] 1. Preparation method

[0073] (1) adding the silicon dioxide microsphere powder with an average diameter of 110nm into dehydrated alcohol for ultrasonic dispersion to obtain a microsphere dispersion with a mass fraction of 10%;

[0074] (2) Add 4 mL of tetraethyl silicate and 4 mL of ammonia water with a mass fraction of 25% to 5 mL of the microsphere dispersion, and react at room temperature for 18 hours to obtain liquid A;

[0075] (3) After centrifuging liquid A to remove the supernatant, dry it at 80°C for 12 hours, and thoroughly grind it evenly to obtain roughened microspheres with an average diameter of 180 nm;

[0076] (4) the roughened microspheres obtained in step (3) are mixed uniformly with carbon powder in a mass ratio of 1:0.05;

[0077] (5) Dissolve dimethylsiloxane resin in toluene (the mass ratio of the two is 1:2) to obtain a dimethylsiloxane resin solution;

[0078...

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Abstract

The invention provides a structural color super-hydrophobic coating and a preparation method thereof. The preparation method comprises the following steps: subjecting submicron microspheres to surfaceroughening modification so as to obtain roughened microspheres, then uniformly mixing the roughened microspheres with carbon powder, then adding an obtained mixture into a dimethyl siloxane resin solution, and carrying out full dispersion so as to obtain the structural color super-hydrophobic coating. The coating provided by the invention is simple in preparation process, low in cost and friendlyto the environment; the coating can be used as a self-cleaning and heavy-metal-free colored environmentally-friendly waterborne coating, is easy to be smeared, and has high adhesive force, corrosionresistance and wide applicability; a coating layer prepared from the coating provided by the invention can be rapidly repaired and reduced after being damaged; and the super-hydrophobic coating has high strength and has important application value and wide application prospects in the polymer coating industry.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic coatings, in particular to a structural color superhydrophobic coating and a preparation method thereof. Background technique [0002] There are two major pollutants in traditional paints: volatile organic compounds (such as toluene, formaldehyde) and heavy metal pigment substances (such as cadmium yellow PbCrO 4 ). Although the industrial technology that has been industrialized can realize the production of completely water-based interior coatings (such as water-based epoxy, water-based polyurethane, etc.), there is still no good substitute for heavy metal pigment substances, and its substitutes are usually organic dyes, but Often also have high toxicity. [0003] Superhydrophobic coatings have received extensive attention due to their self-cleaning, dust-proof, and reduced wall maintenance costs. Traditional superhydrophobic coatings are mainly constructed using nanoscale hierarchica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/65C09D7/61C09D7/62
CPCC09D7/61C09D7/62C09D7/65C09D7/70C09D183/04C08L25/06C08L3/04C08K9/02C08K7/18C08K3/04C08L33/12
Inventor 洪炜孙杰冯业昌
Owner SUN YAT SEN UNIV
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