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Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof

A technology of moisture-sensitive discoloration and functional materials, which is applied in the field of anti-counterfeiting, can solve the problems of single moisture-sensitive discoloration mechanism and easy imitation, and achieve the effect of high reliability, difficulty of imitation, and increased reliability

Active Publication Date: 2015-06-03
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, what the present invention is to solve is the problem that the mechanism of moisture-sensitive discoloration in the prior art is single and is easy to be imitated. It provides a moisture-sensitive discoloration anti-counterfeiting functional material with a novel discoloration mechanism and its preparation method and application.

Method used

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  • Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof
  • Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof
  • Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof

Examples

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Embodiment 1

[0039] This embodiment provides a moisture-sensitive color-changing anti-counterfeiting functional material and a preparation method thereof. The moisture-sensitive color-changing anti-counterfeiting functional material includes component A and component B, and component A and component B form a liquid with component B as the matrix. Gel system; wherein, component A is distributed in periodic lattice in component B in the form of particles. Component A is polystyrene microspheres with a particle size of 155nm and a refractive index of 1.5; component B is a hydrogel with acrylamide as a monomer and a refractive index of 1.3.

[0040] The preparation method of the moisture-sensitive color-changing anti-counterfeiting functional material is:

[0041] 1) Disperse polystyrene microspheres with a diameter of 155nm in water to make a suspoemulsion with a concentration of 0.45wt%, using the vertical deposition method (see 2008 published in "Journal of Chongqing Normal University (Natu...

Embodiment 2

[0048] This embodiment provides a moisture-sensitive color-changing anti-counterfeiting functional material and a preparation method thereof. The moisture-sensitive color-changing anti-counterfeiting functional material includes component A and component B, and component A and component B form a liquid with component B as the matrix. Gel system; wherein, component A is distributed in periodic lattice in component B in the form of particles. Component A is polystyrene microspheres with a particle diameter of 145nm and a refractive index of 1.58; component B is a hydrogel with acrylamide as a monomer and a refractive index of 1.4.

[0049] The preparation method of the moisture-sensitive color-changing anti-counterfeiting functional material is:

[0050] 1) Disperse polystyrene microspheres with a diameter of 145nm in water to make a suspoemulsion with a concentration of 0.55wt%, and use the natural sedimentation method (see "Photonics" published on pages 1-5 of the fourth issue...

Embodiment 3

[0057] This embodiment provides a moisture-sensitive color-changing anti-counterfeiting functional material and a preparation method thereof. The moisture-sensitive color-changing anti-counterfeiting functional material includes component A and component B, and component A and component B form a liquid with component B as the matrix. Gel system; wherein, component A is distributed in periodic lattice in component B in the form of particles. Component A is polystyrene-polyacrylic acid copolymer microspheres with a particle size of 180nm, and the refractive index is 1.7; Gel with a refractive index of 1.48.

[0058] The preparation method of the moisture-sensitive color-changing anti-counterfeiting functional material is:

[0059] 1) Disperse polystyrene-polyacrylic acid copolymer microspheres with a diameter of 180nm in water to make a suspoemulsion with a concentration of 0.55wt%, and use the vertical deposition method (see 2008 published in "Journal of Chongqing Normal Unive...

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Abstract

The invention provides a humidity-sensitive allochroic anti-counterfeiting functional material which comprises a photon crystal and a component B, wherein the photon crystal and component B form a component-B-base liquogel system; the photon crystal is a component A which is distributed in the component B in a periodic dot matrix mode in the form of particles; and the volume changes as the humidity of the component B changes. The particles in the component A are distributed in a dot matrix mode to form the three-dimensional photon crystal, thereby displaying the specific color; the component B has the swelling characteristic, and the volume changes as the humidity changes; and therefore, the dot matrix period parameters of the photon crystal formed by the component A can change as the swelling characteristic of the component B changes, so the defined wavelength can change, thereby displaying different colors and further implementing the anti-counterfeiting function. The color of the humidity-sensitive allochroic anti-counterfeiting functional material is determined by the dot matrix period parameters of the photon crystal formed by the component A, and thus, the material has high reliability and can not be easily imitated.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting, and in particular relates to a moisture-sensitive color-changing anti-counterfeiting functional material and a preparation method and application thereof. Background technique [0002] Public anti-counterfeiting is an anti-counterfeiting technology that can identify anti-counterfeiting features without using any instruments or equipment to identify the distinctive marks on public products or articles for the convenience of the public to distinguish between true and false. Instruments and equipment can be identified only by simple and easy methods. Therefore, in the field of anti-counterfeiting technology, public anti-counterfeiting is the most widely used. [0003] Public anti-counterfeiting technology usually uses visual information as the identification point, and displays patterns with different characteristics or color changes under different states (such as viewing angle, light s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L25/06C08L25/08
Inventor 刘义龙李新宇曹瑜李春芝
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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