CN117173984A - Photo-curing fluorescent anti-counterfeiting bar code and preparation method and application thereof - Google Patents
Photo-curing fluorescent anti-counterfeiting bar code and preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses a photo-curing fluorescent anti-counterfeiting bar code and a preparation method and application thereof. The fluorescent anti-counterfeiting bar code takes light-cured polyurethane resin as a matrix, and two dyes of fluorescein and rhodamine 6G can simultaneously obtain multiple fluorescent signals after single wavelength excitation through a fluorescence resonance energy transfer effect, and the regulation and control of fluorescent colors are realized, so that a unique fluorescent color combination is formed. The mixed solution of dye and resin is printed on various base materials, and fluorescent anti-counterfeiting bar codes are prepared through photo-curing. The fluorescent anti-counterfeiting bar code has high encryption degree, good chemical stability and anti-interference capability, is simple to manufacture and low in cost, and can be used as a simple and efficient fluorescent anti-counterfeiting material.
Description
Technical Field
The invention belongs to the field of fluorescent anti-counterfeiting materials, and particularly relates to a photo-curing fluorescent anti-counterfeiting bar code and a preparation method and application thereof.
Background
Most of the existing anti-counterfeiting methods have the defects of simplicity in encryption, easiness in imitation, complex operation during anti-counterfeiting identification, high requirement on instruments and the like. Among the various anti-counterfeiting materials, the fluorescent anti-counterfeiting material has been used because of its low cost, strong recognition capability, no toxicity, difficulty in imitation, etc.
The main traditional anti-counterfeiting methods at present mainly comprise representative anti-counterfeiting methods such as scratch coating, hologram, watermark and the like. Scratch coating is the most common anti-counterfeiting means for checking authenticity, and is mainly suitable for various small commodities. Under the ink coating, the product lot number of the commodity is generally required to be logged in to a specified website, and the product lot number is input to inquire the product information. The scratch coating is a one-time authenticity checking method, and a consumer first scratches the coating before opening a new product, determines that the commodity is not disassembled, and further inquires commodity information after the commodity is first unpacked. The anti-counterfeiting method is low in cost, but is a disposable query means, and cannot realize anti-counterfeiting query of the whole commodity process. Hologram anti-counterfeiting is anti-counterfeiting encryption based on a mechanism that a photonic crystal can present different color states under different angles. The hologram can record not only text and pattern information, but also the current light conditions, so that the hologram obtained in practice is a three-dimensional map. When anti-fake authentication is carried out, the method is a visual authentication process, and multiple and repeated authentication of the whole process can be realized. Kim et al report an anti-counterfeit method of printing self-assembled monolayer up-conversion material on different matrix materials, presenting different pattern colors at different angles based on photonic crystals, the simplest anti-counterfeit watermark is to regularly print copyrighted letters or patterns on some printed matter, mainly preventing direct copy. Besides, some more advanced watermark anti-counterfeiting methods are proposed, including digital image watermarking and optical watermarking, and the traditional anti-counterfeiting methods have some defects, and the anti-counterfeiting marker is simple and easy to imitate in a large scale; the anti-counterfeiting mark does not have a comparison reference object; in order to prevent counterfeiting, counterfeiters are difficult to counterfeit, and many enterprises select a plurality of complicated technologies when manufacturing anti-counterfeiting markers, so that consumers also need to know a plurality of expertise and skills when recognizing, and the method brings great difficulty to the identification and verification of the authenticity of products.
In recent yearsThe effective anti-counterfeiting strategies can be summarized into two types, namely, the application of the color change of the luminous pattern and the anti-counterfeiting tracking of the commodity by utilizing the two-dimensional code or the bar code in combination with the existing communication equipment. Luminescent materials have been used for security as hot spots for research . The encryption characteristic is mainly based on the following two points, namely the luminous secrecy of the luminous material; the luminescent properties of the anti-counterfeiting pattern obtained by the luminescent material are more complex and variable. The fluorescent materials used at the present stage mainly comprise: carbon quantum dot material, metal organic frame material, up-conversion fluorescent material and organic fluorescent material. The organic fluorescent dye plays the advantages of the organic fluorescent dye in the anti-counterfeiting printing technology by the characteristics of high fluorescence quantum yield, high molar absorption coefficient, high optical stability and the like, and effectively solves the problems of high toxicity, high cost and the like of lanthanide rare earth elements and heavy metal contained in quantum dot doped particles. Organic luminescent materials are biological and cell dyeing raw materials mainly containing organic dyes at the earliest, and are widely applied in the fields of light energy conversion, drug detection, medical diagnosis, anti-counterfeiting and the like. The fluorescent dye contains various organic compound types, has flexible molecular design and high relative fluorescence quantum yield, and the luminescence color mainly originates from active groups such as conjugated hybridized groups, chromophores, auxiliary chromophores and the like of molecules in the fluorescent dye, and is easy to be matched with hydroxyl (-OH) and amino (-NH) in molecules to be marked 2 ) And the like. The conjugated length can also be changed structurally by introducing various chromophore groups, carbon-carbon double bonds, benzene rings and other unsaturated groups, such as porphyrin compounds, thiazole derivatives, rhodamine and derivatives, coumarin derivatives and other small molecule luminescent materials, and the luminescent materials are researched and used in a large number at present.
Since the commonly used fluorescent anti-counterfeiting technology is based on the mixture of pure fluorescent dyes, the luminous color is changed by changing the fluorescence emission intensity, so that the anti-counterfeiting pattern realizes anti-counterfeiting based on the change of the luminous color. Fluorescence resonance energy transfer has been implemented in a wide variety of fields including monitoring conformational changes of biomolecules, monitoring interactions between molecules, constructing sensing systems, bioimaging, and immunoassays. Wherein, as multiple signals can be obtained simultaneously through single excitation when the energy transfer occurs, and the energy transfer can realize the complex regulation and control of fluorescent color, the method has great advantages in the fluorescent anti-counterfeiting field. Therefore, in order to realize the anti-counterfeiting technology which is more difficult to imitate by illegal vendors, fluorescent anti-counterfeiting strategies based on fluorescence resonance energy transfer are proposed.
Fluorescent anti-counterfeiting is widely used because of the advantages of low cost, strong recognition capability, no toxicity, difficulty in imitation and the like. The preparation and application of the fluorescent anti-counterfeiting material at present have been advanced to a certain extent, for example, a three-color fluorescent anti-counterfeiting material based on excitation wavelength dependence is prepared in Chinese patent CN109651416A, namely, three-color fluorescent anti-counterfeiting material based on excitation wavelength dependence is prepared by coupling triphenylboric acid and 4-o-carborane bromobenzene through Suzuki coupling reaction to form carborane derivatives, melting and grinding the obtained carborane derivatives into powder, doping the powder into colorless aloe cream, and preparing patterns. However, the fluorescent anti-counterfeiting material is complex in preparation process, so that the preparation cost is high; and the verification process needs to use a plurality of excitation wavelengths, which is not beneficial to convenient verification. Chinese patent CN107936527A, a fluorescent anti-counterfeiting composite material with adjustable wavelength and a preparation method thereof, the anti-counterfeiting material is prepared by carrying out an emulsification reaction on cadmium telluride quantum dots and polyurethane prepolymer to obtain aqueous polyurethane dispersion, but cadmium is a heavy metal element in the cadmium telluride quantum dots, so that the cadmium telluride quantum dots possibly have harm to people and the environment. Chinese patent CN111303141B 2- (2-hydroxyphenyl) benzothiazole derivative, its preparation method and application in fluorescent anti-counterfeit, prepared a 2- (2-hydroxyphenyl) benzothiazole derivative to realize dual-color fluorescence, but the derivative needs to respond by amine vapor and acetic acid vapor, the process is too cumbersome and may cause damage to people and anti-counterfeit articles. Therefore, the development and the preparation of the fluorescent anti-counterfeiting material are economic and efficient, environment-friendly and simple in preparation process.
Disclosure of Invention
In order to solve the defects and shortcomings of the prior art, the invention combines the unique fluorescent color combination brought by fluorescent energy transfer with the two-dimensional code method, and realizes high-quality anti-counterfeiting. The invention uses light-cured polyurethane resin as a matrix, uses two dyes to simultaneously obtain multiple fluorescent signals after being excited by single wavelength through fluorescence resonance energy transfer effect, realizes the regulation and control of fluorescent colors, forms unique fluorescent color combination, and utilizes the combination of the fluorescent colors to prepare the fluorescent anti-counterfeiting two-dimensional code, thereby leading the anti-counterfeiting to have the characteristics of high encryption degree and the like. Since both dyes used are commercially available dyes that are economical and easy to obtain and do not have a complicated synthetic process, and identification and verification can be performed only by irradiation with a hand-held ultraviolet lamp. In addition, the photo-curable resin can be rapidly cured and molded by photo-curing. Therefore, the anti-counterfeiting material has the advantages of good chemical stability, light stability, low cost, simple preparation process, convenient verification and the like, and can meet the requirements of high-efficiency, safe and commercial anti-counterfeiting materials.
The invention aims to provide a light-cured fluorescent anti-counterfeiting bar code, a preparation method of the bar code and application of the bar code in the anti-counterfeiting field.
A preparation method of a photo-curing fluorescent anti-counterfeiting bar code comprises the following steps:
and dissolving the fluorescein, the rhodamine 6G and the photosensitive resin in an organic solvent to obtain a mixed solution, uniformly stirring, printing the mixed solution on a substrate, and curing and forming to obtain the fluorescent anti-counterfeiting bar code, wherein the fluorescent color of the fluorescent anti-counterfeiting bar code is realized by changing the content of the fluorescein and the rhodamine 6G.
Preferably, the molar ratio of fluorescein to rhodamine 6G is 1:0-6.
Preferably, the photosensitive resin is a photocurable polyurethane resin.
More preferably, the molecular weight of the photocurable polyurethane resin is 20000 to 30000Da.
Preferably, the organic solvent is one or more of methanol, ethanol and acetone.
Preferably, the mass ratio of the sum of the masses of the fluorescein and the rhodamine 6G to the photosensitive resin is 0.1-0.9: 1.
preferably, the temperature of the stirring is 20-30 ℃, and the stirring time is 10-30min.
Preferably, the substrate comprises cellulose, brand printing paper, high density paper.
Preferably, the curing molding requires 1-5 minutes of light irradiation with 365nm wavelength.
The invention provides the photo-curing fluorescent anti-counterfeiting bar code prepared by the preparation method of the photo-curing fluorescent anti-counterfeiting bar code.
The invention also provides application of the photo-curing fluorescent anti-counterfeiting bar code in the anti-counterfeiting field.
Preferably, the light-cured fluorescent anti-counterfeiting bar code can be identified and verified through electronic equipment scanning, so that the light-cured fluorescent anti-counterfeiting bar code can be applied to information storage, reading or verification.
The invention has the beneficial effects that:
(1) The raw materials used for the photo-curing fluorescent anti-counterfeiting bar code are all economical commercial dyes, the photo-curing fluorescent anti-counterfeiting bar code is simple and easy to obtain, meanwhile, the preparation process of the photo-curing fluorescent anti-counterfeiting bar code is simple, expensive and complex equipment is not needed for production, and the photo-curing fluorescent anti-counterfeiting bar code is good in stability, nontoxic and environment-friendly. Therefore, the fluorescent anti-counterfeiting bar code is easy to produce and use in large scale.
(2) The photocuring fluorescent anti-counterfeiting bar code can simultaneously obtain multiple fluorescent signals after two dyes are excited by a single wavelength through a fluorescence resonance energy transfer effect, realize the regulation and control of fluorescent colors, form a unique fluorescent color combination, and utilize the fluorescent color combination to prepare a two-dimensional code, so that the anti-counterfeiting bar code has the characteristics of high encryption degree and the like. Therefore, the photo-curing fluorescent anti-counterfeiting bar code is difficult to imitate, has strong anti-interference capability and is beneficial to high-quality anti-counterfeiting application.
(3) The prepared photocuring fluorescent anti-counterfeiting bar code can be verified under the irradiation of a handheld ultraviolet lamp, so that the identification and verification of a user are facilitated.
Therefore, the photo-curing fluorescent anti-counterfeiting bar code prepared by the invention is suitable for being applied as a fluorescent anti-counterfeiting material with simple preparation, economy and high efficiency.
Drawings
FIG. 1 is a fluorescence spectrum of a coating formed by curing and molding fluorescein, rhodamine 6G and a photo-curing polyurethane resin in different proportions on a cellulose substrate.
Fig. 2 is a photograph of an example fluorescent anti-counterfeit bar code formed by curing and molding the fluorescein, rhodamine 6G and the photo-curable polyurethane resin prepared in example 1 on a cellulose substrate.
Fig. 3 is a photograph of an example fluorescent anti-counterfeit bar code formed by curing and molding fluorescein, rhodamine 6G and photo-curable polyurethane resin prepared in example 2 on label printing paper.
Fig. 4 is a photograph showing verification of fluorescent anti-counterfeit bar codes formed by curing and molding fluorescein, rhodamine 6G and photo-curable polyurethane resin prepared in example 3 on high-density paper without irradiation of an ultraviolet lamp.
Fig. 5 is a photograph of a fluorescent anti-counterfeit bar code formed by curing and molding the fluorescein, rhodamine 6G and the photo-curable polyurethane resin prepared in example 3 on high-density paper under irradiation of a handheld ultraviolet lamp.
Detailed description of the preferred embodiments
The invention will be further described with reference to the accompanying drawings and examples. But the practice and protection of the invention is not limited thereto. It should be noted that the following processes, if not specifically described in detail, can be realized or understood by those skilled in the art with reference to the prior art. The reagents or instruments used did not identify the manufacturer and were considered conventional products available commercially.
The fluorescein used in the following examples has the formula C 20 H 12 O 5 The CAS number is: 2321-07-5.
Example 1
3.32g (0.01 mol) of fluorescein was weighed, 33.20g of photo-curable polyurethane resin (20000 Da) was weighed, dissolved in methanol solution and stirred at 20℃for 10min. 3.32G (0.01 mol) of fluorescein and 4.79G (0.01 mol) of rhodamine 6G are weighed, 81.10G of photo-curing polyurethane resin (20000 Da) are weighed, dissolved in methanol solution and stirred for 10min at 20 ℃. 3.32G (0.01 mol) of fluorescein and 14.37G (0.03 mol) of rhodamine 6G were weighed, 176.90G of photo-curing polyurethane resin (20000 Da) was weighed, dissolved in methanol solution and stirred at 20 ℃ for 10min. 3.32G (0.01 mol) of fluorescein, 28.74G (0.06 mol) of rhodamine 6G are weighed, 320.60G of photo-curing polyurethane resin (20000 Da) are weighed, dissolved in methanol solution and stirred for 10min at 20 ℃.
The solution is coated on a cellulose substrate, then light is irradiated for 1 minute by 365nm to obtain a fluorescent anti-counterfeiting coating formed by curing, and the fluorescent emission spectrum of the coating is analyzed, so that a fluorescent emission spectrum diagram of the fluorescent coating formed by curing on the cellulose substrate is shown in figure 1. The molar ratio of fluorescein to rhodamine 6G is 1:0,1:1,1:3,1:6, respectively. The mass ratio of the sum of the masses of fluorescein and rhodamine 6G to the mass ratio of the photo-curing polyurethane is 0.1:1. As shown in FIG. 1, the single-dot chain line in the chromatogram at a ratio of fluorescein to rhodamine 6G of 1:0 shows the highest peak at 515nm, i.e., the emission peak of the donor dye (fluorescein). The short-point line in the spectrogram shows peaks at 515nm and 560nm when the ratio of fluorescein to rhodamine 6G is 1:1, and the fluorescence intensity of the short-point line at 515nm is reduced compared with that of the single-point line. When the ratio of the fluorescein to the rhodamine 6G is 1:3, the short-dash line in the spectrogram respectively shows peaks at 510nm and 560nm, meanwhile, compared with the short-dash line, the fluorescence intensity of the short-dash line at 510nm is greatly reduced and has a certain blue shift, and the fluorescence intensity at 560nm is also enhanced to a certain extent compared with the short-dash line. When the ratio of fluorescein to rhodamine 6G is 1:6, a peak value appears at 570nm in a dashed line spectral line in a spectrogram, the peak value base of a donor dye (fluorescein) is weak, and meanwhile, the fluorescence intensity at 570nm is far higher than that when the ratio of the two dyes is 1:0,1:1 and 1:3 respectively. Therefore, the invention can be found that the fluorescence resonance energy transfer efficiency of the two dyes is gradually increased along with the gradual increase of the content of the acceptor dye (rhodamine 6G), and the fluorescence intensity of the acceptor dye (rhodamine 6G) is also increased along with the gradual increase of the content of the acceptor dye, so that the invention can regulate the luminous state of the dye through the fluorescence resonance energy transfer effect, thereby leading the fluorescence color to present a unique combination.
In addition, the solution is printed on a cellulose substrate, and then the cellulose substrate is irradiated by 365nm light for 1 minute to obtain a cured fluorescent anti-counterfeiting bar code, and the fluorescent photo results of the fluorescent anti-counterfeiting bar code are shown in fig. 2, wherein the fluorescent colors are respectively blue-green (1:0), yellowish (1:1), bright yellow (1:3) and dark yellow (1:6). The molar ratio of fluorescein to rhodamine 6G is 1:0,1:1,1:3,1:6, respectively. The mass ratio of the sum of the masses of fluorescein and rhodamine 6G to the mass ratio of the photo-curing polyurethane is 0.1:1. As shown in fig. 2, the portion on the bar code exhibited a bluish green fluorescent color when the ratio of fluorescein to rhodamine 6G was 1:0, the portion on the bar code exhibited a yellowish fluorescent color when the ratio of fluorescein to rhodamine 6G was 1:1, the portion on the bar code exhibited a bright yellow fluorescent color when the ratio of fluorescein to rhodamine 6G was 1:3, and the portion on the bar code exhibited a dark yellow fluorescent color when the ratio of fluorescein to rhodamine 6G was 1:6. It can be seen that the ratio of donor dye (fluorescein) to acceptor dye (rhodamine 6G) is different, which exhibits a unique combination of fluorescent colors after curing the photo-curable resin coating, thereby enabling the fluorescent security bar code to have more variable color changes.
Example 2
3.32g (0.01 mol) of fluorescein was weighed, 6.64g of photo-curable polyurethane resin (25000 Da) was weighed, dissolved in ethanol solution and stirred at 25℃for 20min. 3.32G (0.01 mol) of fluorescein and 4.79G (0.01 mol) of rhodamine 6G are weighed, 16.22G of photo-curing polyurethane resin (25000 Da) is weighed, dissolved in ethanol solution and stirred for 20min at 25 ℃. 3.32G (0.01 mol) of fluorescein and 14.37G (0.03 mol) of rhodamine 6G were weighed, 35.38G of photo-curable polyurethane resin (25000 Da) were weighed, dissolved in ethanol solution and stirred at 25℃for 20min. The solution is printed on label printing paper, and then light irradiation is carried out for 3 minutes by 365nm, thus obtaining the cured fluorescent anti-counterfeiting bar code.
The fluorescent photograph results of the fluorescent anti-counterfeiting bar code are shown in fig. 3, wherein the fluorescent colors are respectively blue-green (1:0), light yellow (1:1) and light yellow (1:3), and the molar ratio of the fluorescein to the rhodamine 6G is respectively 1:0,1:1 and 1:3. The mass ratio of the sum of the masses of fluorescein and rhodamine 6G to the mass ratio of the photo-curing polyurethane is 0.5:1. As shown in fig. 3, the portion on the bar code exhibits a bluish green color when the ratio of fluorescein to rhodamine 6G is 1:0, the portion on the bar code exhibits a yellowish fluorescent color when the ratio of fluorescein to rhodamine 6G is 1:1, and the portion on the bar code exhibits a bright yellow fluorescent color when the ratio of fluorescein to rhodamine 6G is 1:3, whereby it can be derived that changing the ratio of donor dye (fluorescein) and acceptor dye (rhodamine 6G) can make the colors of the fluorescent anti-counterfeit bar code more diverse, thereby enhancing the difficulty of imitation thereof and improving the anti-counterfeit capability.
Example 3
3.32G (0.01 mol) of fluorescein and 14.37G (0.03 mol) of rhodamine 6G were weighed, 19.66G of photo-curable polyurethane resin (30000 Da) was weighed, dissolved in acetone solution and stirred at 30 ℃ for 30min. 3.32G (0.01 mol) of fluorescein and 4.79G (0.01 mol) of rhodamine 6G are weighed, 9.01G of photo-curing polyurethane resin (30000 Da) is weighed, dissolved in acetone solution and stirred for 30min at 30 ℃. 3.32G (0.01 mol) of fluorescein, 28.74G (0.06 mol) of rhodamine 6G are weighed, 35.62G of photo-curing polyurethane resin (30000 Da) are weighed, dissolved in acetone solution and stirred for 30min at 25 ℃. Printing the solution on high-density paper, then irradiating with 365nm light for 5 min to obtain a cured fluorescent anti-counterfeiting bar code, and verifying the fluorescent anti-counterfeiting bar code under the irradiation of a handheld ultraviolet lamp, wherein the fluorescent colors are respectively bright yellow (1:3), faint yellow (1:1) and dark yellow (1:6), and the molar ratio of fluorescein to rhodamine 6G is respectively 1:3,1:1 and 1:6 as shown in the figure 5. The mass ratio of the sum of the masses of fluorescein and rhodamine 6G to the mass ratio of the photo-curing polyurethane is 0.9:1.
As shown in fig. 4, the fluorescent anti-counterfeit bar code is not visible when illuminated by a hands-free uv lamp. As shown in FIG. 5, when the fluorescent anti-counterfeiting bar code is irradiated by a portable ultraviolet lamp, the part on the bar code shows bright yellow fluorescent color when the ratio of fluorescein to rhodamine 6G is 1:3, the part on the bar code shows yellowish fluorescent color when the ratio of fluorescein to rhodamine 6G is 1:1, and the part on the bar code shows dark yellow fluorescent color when the ratio of fluorescein to rhodamine 6G is 1:6, so that the fluorescent anti-counterfeiting bar code is invisible without the irradiation of the portable ultraviolet lamp and cannot obtain specific information on the bar code, and when the bar code is irradiated by the ultraviolet lamp, the bar code can show unique color combination, and the information hidden in the bar code can be scanned. The fluorescent anti-counterfeiting bar code has good anti-counterfeiting capacity.
In addition, the prepared fluorescent anti-counterfeiting bar code has no change after being stored for one month in a common environment, and still has high-brightness fluorescence, which indicates that the fluorescent anti-counterfeiting bar code has good storage stability, environmental light stability and environmental chemical stability. Therefore, the fluorescent anti-counterfeiting bar code prepared by the invention can be used as a simple and efficient fluorescent anti-counterfeiting material.
The foregoing examples are illustrative of the present invention and are not intended to be limiting, but rather, the invention is intended to be limited to the specific embodiments shown, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principles of the invention are intended to be equivalent substitutes and modifications within the scope of the invention.
Claims (10)
1. The preparation method of the photo-curing fluorescent anti-counterfeiting bar code is characterized by comprising the following steps of:
and dissolving the fluorescein, the rhodamine 6G and the photosensitive resin in an organic solvent to obtain a mixed solution, uniformly stirring, printing the mixed solution on a substrate, and curing and forming to obtain the fluorescent anti-counterfeiting bar code, wherein the fluorescent color of the fluorescent anti-counterfeiting bar code is realized by changing the content of the fluorescein and the rhodamine 6G.
2. The method for preparing the photo-curing fluorescent anti-counterfeiting bar code according to claim 1, wherein the molar ratio of fluorescein to rhodamine 6G is 1:0-6.
3. The method for preparing a photo-curable fluorescent anti-counterfeit bar code according to claim 1, wherein the photosensitive resin is photo-curable polyurethane resin.
4. The method for preparing a photo-curing fluorescent anti-counterfeiting bar code according to claim 3, wherein the molecular weight of the photo-curing polyurethane resin is 20000-30000 Da.
5. The method for preparing a photo-curing fluorescent anti-counterfeiting bar code according to claim 1, wherein the organic solvent is more than one of methanol, ethanol and acetone.
6. The method for preparing a photo-curing fluorescent anti-counterfeiting bar code according to claim 1, wherein the mass ratio of the sum of the masses of fluorescein and rhodamine 6G to the photosensitive resin is 0.1-0.9:1; the stirring temperature is 20-30 ℃, and the stirring time is 10-30min.
7. The method for preparing a photo-curing fluorescent anti-counterfeiting bar code according to claim 1, wherein the base material comprises cellulose, trademark printing paper and high-density paper.
8. The method for preparing a photo-curing fluorescent anti-counterfeiting bar code according to claim 1, wherein the curing molding process is carried out by irradiating light with a wavelength of 365nm for 1-5 minutes.
9. A photo-curable fluorescent anti-counterfeiting bar code prepared by the method for preparing the photo-curable fluorescent anti-counterfeiting bar code according to any one of claims 1 to 8.
10. The application of the light-cured fluorescent anti-counterfeiting bar code in the anti-counterfeiting field as set forth in claim 9, wherein the light-cured fluorescent anti-counterfeiting bar code can be identified and verified by scanning of electronic equipment so as to be applied to information storage, reading or verification.
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