CN115232514A - Structural color material capable of developing color in presence of water and preparation method thereof - Google Patents
Structural color material capable of developing color in presence of water and preparation method thereof Download PDFInfo
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- CN115232514A CN115232514A CN202210860073.2A CN202210860073A CN115232514A CN 115232514 A CN115232514 A CN 115232514A CN 202210860073 A CN202210860073 A CN 202210860073A CN 115232514 A CN115232514 A CN 115232514A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
Abstract
The invention provides a structural color material capable of developing color when meeting water and a preparation method thereof. The material of the invention has simple preparation process, low cost and environmental protection; the material can realize public optical anti-counterfeiting which is difficult to copy, can be industrially produced into an anti-counterfeiting means of industrial and commercial product packaging which is edited by an anti-counterfeiting pattern and has special encryption requirements. The paper money anti-counterfeiting ink has important application value and wide application prospect in the fields of polymer coating industry, special optical anti-counterfeiting ink industry and the like, and can endow paper money of a new generation with anti-counterfeiting characteristic of color copying prevention, thereby promoting the benign development of a high value-added industrial chain.
Description
Technical Field
The invention relates to the technical field of special optical anti-counterfeiting ink, in particular to a structural color material capable of developing color when meeting water and a preparation method thereof.
Background
The optical anti-counterfeiting technology is a key supporting technology for economic transactions such as commodity identification and modern paper money, and plays an extremely important role in the protection of high value-added commodities and the construction of economic informatization. Thermosensitive and fluorescent inks and the like adopted by the traditional optical anti-counterfeiting technology have the problems of easy imitation of anti-counterfeiting marks, low technical means identification degree, low threshold and the like, so that the innovative anti-counterfeiting technology is urgently needed. Although the theoretical research result of optical anti-counterfeiting at home and abroad is rich, the technical and cost problems of practical application are still not solved so far. The specificity in the field of anti-counterfeiting also determines that the technical threshold is low and the related technologies with a large number of open documents cannot be widely applied.
Patent CN110484078A discloses a water-variable transparent coating and a preparation method thereof, the prepared coating has good water-variable transparent property, but the coating does not have adjustable color, and the coating needs to be covered on the upper layer of a chemical pigment substance as a coating, and the color of the substance below can be displayed only when the coating becomes transparent when the coating meets water, so that the coating is limited to be applied in the fields of coating, pigment, ink and the like.
Therefore, the colored environment-friendly ink which has wettability and can show the intrinsic structural color when meeting water has important application value for special optical anti-counterfeiting ink and industries based on the application.
Disclosure of Invention
The invention aims to provide a structural color material capable of developing color when meeting water and a preparation method thereof. Based on the preparation technology with controllable appearance, refractive index and size of submicron colloidal microspheres, on the basis of systematically exploring the preparation process and optical characteristics of colloidal microspheres, the optical scattering phenomenon of the microspheres with controllable appearance and size is utilized, the functional application of the microspheres and the ink compounding process are perfected, the influence of parameters such as the microsphere structure, the compounding proportion, the polymer tissue structure and the like on the characteristics of an optical anti-counterfeiting system is researched, and finally, the structural color material with different colors and capable of developing when meeting water is obtained through regulation and control. The ink which is easy to repeatedly prepare, has continuously adjustable physical structure color, wide application range and low production cost and realizes special optical anti-counterfeiting is provided.
The invention aims to provide a structural color material capable of developing color when meeting water and a preparation method thereof.
The invention also aims to provide the structural color ink capable of developing color when meeting water, which is prepared by the preparation method.
The above purpose of the invention is realized by the following technical scheme:
the invention provides a preparation method of a water-borne color developing structural color material, which comprises the steps of firstly uniformly mixing submicron-sized colloid microspheres and a black light absorption substance, then adding a white micron-sized scatterer, and fully dispersing to obtain the water-borne color developing structural color material.
The invention discloses a low-cost environment-friendly ink which is prepared by designing a low-cost polymer emulsion system, mixing submicron colloidal microspheres with white micron scatterers to destroy the stacking order degree of the submicron colloidal microspheres to generate a physical structural color without angle dependence, and enhancing the structural color saturation through a black light absorption substance and compounding emulsion, wherein the low-cost environment-friendly ink is low in cost, adjustable in color (the continuously adjustable physical structural color replaces heavy metal pigment substances and comprises various colors, pure white and semitransparent colors) and capable of developing color when meeting water.
Preferably, the submicron-sized microspheres have an average diameter of 100 to 300nm.
Preferably, the submicron microsphere is any one of silicon dioxide, titanium dioxide, polystyrene and polymethyl methacrylate.
Preferably, the white micron-sized scatterer is any one of mesoporous silica, titanium dioxide and diatomite.
Preferably, the black light absorbing substance is any one of carbon black, carbon nanotubes, graphene, and polydopamine.
Preferably, the mass ratio of the submicron colloidal microspheres to the black light absorbing substance to the white micron scatterers is 1.
The invention also provides a structural color material capable of developing color when meeting water, which is prepared by the preparation method.
The structural color of the water-dispersible color-developing structural color material prepared by the invention is mainly controlled by the particle size of the microspheres, and the color development mechanism is mainly controlled by the white micron-sized scatterers. The microsphere system with different structural colors can be obtained by selecting microspheres with different particle sizes and controlling the surface appearance of the microspheres, and the microspheres and the white micron-sized scatterer with the changed refractive index when meeting water form the composite ink, so that the composite ink has a great application prospect in the special optical anti-counterfeiting ink industry.
The invention also provides a method for preparing a coating from the water-borne color-developing structural color material prepared by the method, which comprises the following steps: and wiping the substrate clean and drying, then spraying or coating the material on the surface of the substrate, and drying to obtain the coating.
Through a large amount of research and exploration, the completeness of the microsphere surface appearance of the water-color-developing structural color material and the uniformity of the mixed white micron-sized scatterer can influence the color developing effect of the material, and the key points of the preparation for ensuring the completeness of the microsphere surface appearance of the composite material and the overall uniformity of the material are as follows: controlling the grain size of the colloidal microspheres and controlling the mixing ratio of the colloidal microspheres, the black light absorption substance and the white micron-sized scatterer. The color developing effect of the material can be influenced by the misadjustment of the mixing proportion of the colloidal microspheres, the black light absorption substance and the white micron-sized scatterer, so that the material can show color in a dry state or cannot develop color when meeting water.
The invention has the following beneficial effects:
1. the method for preparing the structural color material capable of developing color when meeting water is simple and convenient to operate, the used raw materials are cheap and easy to obtain, expensive instruments are not needed, the cost is low, and the method is suitable for industrial preparation, is suitable for multiple purposes and has good practical popularization and application values.
2. Different structural color characteristics are obtained by selecting the colloidal microspheres with different particle sizes, and the structural color of the composite material is continuously regulated and controlled according to actual requirements.
3. The invention provides a preparation method of a structural color material capable of developing color when meeting water, the material prepared by the method overcomes the problems of easy imitation of anti-counterfeiting marks, low technical means identification degree and threshold and the like of thermosensitive and fluorescent ink and the like adopted by the traditional optical anti-counterfeiting technology, and has wide application range.
4. The coating prepared by the material can show intrinsic structural color when meeting water, and has important application value and wide application prospect in the industries of high polymer coatings and toys.
Drawings
FIG. 1 is a photograph of a water-swellable structural color material in a dry state (red, green, blue, from left to right);
FIG. 2 is a photograph of a water-exposed color structure material in a wet state (red, green, blue, from left to right);
FIG. 3 is a reflection spectrum of a blue water-color-developing structural color material before and after wetting;
FIG. 4 is a reflection spectrum of a green water-swellable structural color material before and after wetting;
FIG. 5 is a reflection spectrum of a red water-developable color-building material before and after wetting.
Detailed Description
The invention is further described with reference to the drawings and the following detailed description, which are not intended to limit the invention in any way. The reagents, methods and apparatus employed in the present invention are conventional in the art, except as otherwise indicated.
Unless otherwise indicated, reagents and materials used in the following examples are commercially available.
Example 1
The preparation method of the water-encountering color-developing structural color material comprises the following steps: mixing and grinding polystyrene microsphere powder with the average diameter of 150nm and carbon black uniformly according to the mass ratio of 1.002, and adding polystyrene microsphere powder with the average pore volume of 1.1cm 3 The water-color-developing structural color material is prepared by fully dispersing/g of mesoporous silica (the mass ratio of the mesoporous silica to the microspheres is 0.5.
The water-color-developing structural color material of this example was subjected to a performance test, and the material appeared white in the dry state and blue after being soaked in water, as shown in fig. 1 (right) and fig. 2 (right), as evidenced by the reflection spectrum shown in fig. 3.
Example 2
The preparation method of the water-color-developing structural color material comprises the following steps: mixing and grinding polystyrene microsphere powder with the average diameter of 200nm and carbon black uniformly according to the mass ratio of 1.002, and adding polystyrene microsphere powder with the average pore volume of 1.1cm 3 And (2) the water-borne color developing structural color material is obtained by fully dispersing the mesoporous silica (the mass ratio of the mesoporous silica to the microspheres is 0.5.
The water-color-developing structural color material of this example was subjected to a performance test in the same manner as in example 1, and the material appeared white in a dry state and appeared green after being wetted with water, as shown in fig. 1 (center) and 2 (center), as evidenced by the reflection spectrum shown in fig. 4.
Example 3
The preparation method of the water-color-developing structural color material comprises the following steps: mixing and grinding silicon dioxide microsphere powder with the average diameter of 110nm and carbon black according to the mass ratio of 1Homogenizing, adding into the mixture an average pore volume of 1.1cm 3 And (2) the water-borne color developing structural color material is obtained by fully dispersing the mesoporous silica (the mass ratio of the mesoporous silica to the microspheres is 0.5.
The water-color-developing structural color material of the present example was subjected to a performance test, and in the same manner as in the test method of example 1, the material appeared white in a dry state and appeared blue after being soaked in water.
Example 4
The preparation method of the water-encountering color-developing structural color material comprises the following steps: mixing and grinding polymethyl methacrylate microsphere powder with the average diameter of 150nm and carbon black uniformly according to the mass ratio of 1 3 And (2) the water-borne color developing structural color material is obtained by fully dispersing the mesoporous silica (the mass ratio of the mesoporous silica to the microspheres is 0.5.
The material of the structural color developed when meeting water in the embodiment is subjected to performance test, and the material presents white color in a dry state and presents blue color after being soaked in water in the same test method as the embodiment 1.
Example 5
The preparation method of the water-encountering color-developing structural color material comprises the following steps: mixing titanium dioxide microsphere powder with the average diameter of 300nm and carbon black according to the mass ratio of 1.002, uniformly grinding, and adding titanium dioxide microsphere powder with the average pore volume of 1.1cm 3 And (2) the water-borne color developing structural color material is obtained by fully dispersing the mesoporous silica (the mass ratio of the mesoporous silica to the microspheres is 0.5.
The water-color-developing structural color material of this example was subjected to a performance test, and in the same manner as in the test method of example 1, the material appeared white in a dry state, and appeared red after being wetted with water, as shown in fig. 1 (left) and 2 (left), and the reflectance spectrum chart confirms this, as shown in fig. 5.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A preparation method of a water-color-developing structural color material is characterized in that submicron colloidal microspheres and black light-absorbing substances are uniformly mixed, then white micron scatterers are added, and the water-color-developing structural color material is obtained after full dispersion.
2. The method of claim 1, wherein the submicron colloidal microspheres have an average diameter of 100 to 300nm.
3. The method of claim 1, wherein the submicron colloidal microspheres are any one of silica, titania, polystyrene, and polymethylmethacrylate.
4. The method according to claim 1, wherein the black light absorbing material is any one of carbon black, carbon nanotubes, graphene, and polydopamine.
5. The preparation method according to claim 1, wherein the white micron-sized scatterer is any one of mesoporous silica, titanium dioxide, and diatomaceous earth.
6. The method according to claim 1, wherein the mass ratio of the submicron colloidal microspheres, the black light absorbing substance and the white micron scatterers is 1.
7. The structural color material capable of developing color when meeting water prepared by the preparation method of any one of claims 1 to 6.
8. A method for preparing a coating by using the water-color-developing structure color material prepared by the preparation method of any one of claims 1 to 6, which is characterized by comprising the following steps: and wiping the substrate clean and drying, then spraying or coating the coating on the surface of the substrate, and drying to obtain the coating.
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| CN202210860073.2A CN115232514B (en) | 2022-07-20 | 2022-07-20 | Water-contacting color-developing structural color material and preparation method thereof |
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| CN202210860073.2A CN115232514B (en) | 2022-07-20 | 2022-07-20 | Water-contacting color-developing structural color material and preparation method thereof |
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| CN115232514B CN115232514B (en) | 2023-06-23 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233802A (en) * | 2014-09-28 | 2014-12-24 | 苏州印丝特纺织数码科技有限公司 | Preparation method of natural silk fabric with photonic crystal structure color |
| CN107903715A (en) * | 2017-11-27 | 2018-04-13 | 陕西科技大学 | A kind of preparation method of the high saturation schemochrome pigment compound based on polypyrrole and silica |
| CN108227053A (en) * | 2018-01-15 | 2018-06-29 | 河北师范大学 | The method for improving non-rainbow schemochrome chroma-luminance |
| CN109294336A (en) * | 2018-09-28 | 2019-02-01 | 许昌学院 | A kind of schemochrome Chinese painting colour and preparation method thereof |
| CN110449329A (en) * | 2019-08-08 | 2019-11-15 | 吉林大学 | A kind of preparation method of the non-iris schemochrome film of super-hydrophobicity |
| CN110766119A (en) * | 2019-09-27 | 2020-02-07 | 河北师范大学 | Physical unclonable structural color anti-counterfeiting label with multiple anti-counterfeiting modes |
| US20210091964A1 (en) * | 2019-09-23 | 2021-03-25 | Hebei Normal University | Physically unclonable structural-color anti-counterfeiting label with artificial intelligence authentication |
| CN113072867A (en) * | 2021-02-24 | 2021-07-06 | 中山大学 | Water-based polyurethane structural color waterproof coating and preparation method and application thereof |
-
2022
- 2022-07-20 CN CN202210860073.2A patent/CN115232514B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104233802A (en) * | 2014-09-28 | 2014-12-24 | 苏州印丝特纺织数码科技有限公司 | Preparation method of natural silk fabric with photonic crystal structure color |
| CN107903715A (en) * | 2017-11-27 | 2018-04-13 | 陕西科技大学 | A kind of preparation method of the high saturation schemochrome pigment compound based on polypyrrole and silica |
| CN108227053A (en) * | 2018-01-15 | 2018-06-29 | 河北师范大学 | The method for improving non-rainbow schemochrome chroma-luminance |
| CN109294336A (en) * | 2018-09-28 | 2019-02-01 | 许昌学院 | A kind of schemochrome Chinese painting colour and preparation method thereof |
| CN110449329A (en) * | 2019-08-08 | 2019-11-15 | 吉林大学 | A kind of preparation method of the non-iris schemochrome film of super-hydrophobicity |
| US20210091964A1 (en) * | 2019-09-23 | 2021-03-25 | Hebei Normal University | Physically unclonable structural-color anti-counterfeiting label with artificial intelligence authentication |
| CN110766119A (en) * | 2019-09-27 | 2020-02-07 | 河北师范大学 | Physical unclonable structural color anti-counterfeiting label with multiple anti-counterfeiting modes |
| CN113072867A (en) * | 2021-02-24 | 2021-07-06 | 中山大学 | Water-based polyurethane structural color waterproof coating and preparation method and application thereof |
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