Method for preparing structural color coating with force-induced discoloration capability

A structural color and color-induced color technology, applied in the field of structural color, can solve the problems of poor water resistance and weather resistance of structural color coatings, destroying the optical properties of coating materials, and destroying the periodic structure of materials. The effect of improving optical properties

Active Publication Date: 2020-11-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

China's invention patent application 201510091033.6 first uses nanoparticle assembly to produce structural color, and then provides a hydrophobic structural color coating by coating the surface of the material with a hydrophobic agent, which solves the problem of water resistance of the structural color coating in practical applications Problems with poor weather resistance
However, structural color coatings will inevitably be damaged during use, destroying the periodic structure of the material, thereby destroying the optical properties of the coating material

Method used

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  • Method for preparing structural color coating with force-induced discoloration capability
  • Method for preparing structural color coating with force-induced discoloration capability
  • Method for preparing structural color coating with force-induced discoloration capability

Examples

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Embodiment 1

[0038] A method for rapidly preparing a structural color coating with mechanochromic ability on a large scale, comprising the following steps:

[0039] (1) Polyurethane with a molecular weight of 10000, silicon dioxide nanoparticles with a diameter of 204nm and carbon black nanoparticles with a diameter of 5 to 50nm are dispersed in an ethanol solution by ultrasonic to obtain a precursor dispersion containing 0.005% silicon dioxide and 0.005% polyurethane, Stand still for 2-48 hours (such as 5 hours) to make the nanoparticles and the polymer fully interact; wherein the mass ratio of polyurethane, silicon dioxide nanoparticles and carbon black nanomaterials is 1000:1000:1.

[0040] (2) Pour the precursor dispersion into a spraying container, spray it on the substrate, and obtain a structural color coating with mechanochromic ability at 10°C, and the area of ​​the color coating is determined by the size of the substrate.

Embodiment 2

[0042] A method for rapidly preparing a structural color coating with mechanochromic ability on a large scale, comprising the following steps:

[0043] (1) Polyurethane with a molecular weight of 10000, silicon dioxide nanoparticles with a diameter of 230nm and carbon black nanoparticles with a diameter of 5 to 50nm are dispersed in an ethanol solution by ultrasonic to obtain a precursor dispersion containing 40% silicon dioxide and 50% polyurethane, Stand still for 2 to 48 hours, wherein the mass ratio of polyurethane, silicon dioxide nanoparticles and carbon black nanomaterials is 1000:1000:1.

[0044] (2) Pour the precursor dispersion into a spraying container, spray it on the substrate, and obtain a structural color coating with mechanochromic ability at 30° C., and the area of ​​the color coating is determined by the size of the substrate.

Embodiment 3

[0046] This embodiment includes the following steps:

[0047] (1) Polyurethane with a molecular weight of 50,000, silica nanoparticles with a diameter of 230nm, and carbon black nanoparticles with a diameter of 5 to 50nm are dispersed in an aqueous solution by ultrasonic to obtain a precursor dispersion containing 0.005% silica and 0.001% polyurethane. Place for 2-48 hours, wherein the mass ratio of polyurethane, silicon dioxide nanoparticles and carbon black nanomaterials is 1000:1000:1.

[0048] (2) Inject the precursor dispersion into the mold, and at 50°C, the solvent is firstly volatilized for 8 hours, and then vacuum-dried for 12 hours to obtain a structural color coating with mechanochromic ability. The area of ​​its elastic body is determined by the size of the container device.

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Abstract

The invention belongs to the field of structural colors, and discloses a method for preparing a structural color coating with force-induced discoloration capability. The method comprises the followingsteps: dispersing a polymer matrix material and nano particles in a solvent to form a precursor dispersion liquid; and then, removing the solvent from the precursor dispersion liquid in a pre-designed mold or on a pre-designed substrate by utilizing a solvent evaporation method or a spraying method to obtain a structural color coating with a force-induced discoloration capability. Aiming at the structural color coating, the nano particles are orderly arranged in the polymer matrix through the assembly part, so that the structural color coating can show color, and the color can change along with the external force effect on the color coating to generate force-induced discoloration. According to the method, the polymer is introduced to construct the structural color coating, and rapid and large-scale preparation of the structural color coating with the force-induced discoloration capacity can be achieved.

Description

technical field [0001] The invention belongs to the field of structural color, and more specifically relates to a method for preparing a structural color coating with mechanochromic ability, which can rapidly and large-scale prepare the structural color coating with mechanochromic ability. Background technique [0002] Structural color is a color produced by the interaction of visible light and periodic micro-nano structures, and it is a physical color production method. Different from the colors produced by traditional dyes and pigments, structural colors have the advantages of high brightness, high saturation and iridescence. In addition, structural color itself has the characteristics of no pollution, low energy consumption and non-fading, which makes it attract more and more attention. In order to meet the various needs of human beings for color, it is of great research value to apply structural color to the field of color coating. [0003] With the improvement of peop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D125/06C09D171/02C09D183/08C09D7/61C09D7/62C09D5/29
CPCC08K2003/2275C08K2201/003C08K2201/011C08L2205/025C08L2205/03C09D5/29C09D125/06C09D175/04C09D183/08C09D7/61C09D7/62C08K3/36C08K3/04C08L71/02C08K9/10C08K3/22
Inventor 朱锦涛李苗苗张连斌钟瑞
Owner HUAZHONG UNIV OF SCI & TECH
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