Luminescent material with dynamic light conversion and preparation method and application thereof

Abstract

The invention discloses a luminescent material with dynamic light conversion as well as a preparation method and application thereof, and relates to the field of textile anti-counterfeiting application. The luminescent material with the dynamic light conversion function is prepared from the following components in parts by weight: 24 to 25 parts of methylbenzene, 48 to 49 parts of deionized water, 2 to 3 parts of Tween-80, 2 to 3 parts of ethylene glycol and 0.02 to 0.04 part of single luminescent molecules. The invention also provides a preparation method and application of the compound. The material disclosed by the invention has the characteristics of being activatable, photoresponsive, reversible in transformation and high in stability, can realize a unique light-emitting behavior different from that of a traditional light-emitting material, is widely applicable to the field of anti-counterfeiting, and effectively solves the problems of poor anti-counterfeiting effect and poorer stability of an existing anti-counterfeiting base material on textiles.

Description

Technical Field

[0001] The present invention relates to the field of anti-counterfeiting applications of textiles, and particularly to a luminescent material with dynamic light conversion, its preparation method and application. Background Art

[0002] In the current field of anti-counterfeiting materials, traditional anti-counterfeiting technologies usually rely on the doping of multi-components such as organic substances and metal ions, polymer matrices, etc., and prepare materials with fluorescence emission characteristics through high-temperature stirring and long-time reactions. These materials generally have certain luminescent properties, but their preparation processes are cumbersome, costly, and have low preparation efficiency, resulting in significant limitations in their wide applications. Traditional methods not only require long reaction times and complex operation steps, but also due to the interactions between multi-component materials, the quality of the final products is unstable, which poses many challenges for the practical production and application of such anti-counterfeiting materials.

[0003] At the same time, most traditional anti-counterfeiting materials need to transfer transparent luminescent materials to substrates during application, and rely on the luminescent properties of the materials themselves to make the substrates show fluorescence effects under light. Although this method can meet the anti-counterfeiting requirements to a certain extent, it also has some obvious defects. For example, the substrates can show fluorescence effects under light conditions, but the performance and effects of the materials are often affected by environmental factors and are prone to photo-bleaching. Especially in the application on substrates such as textiles, traditional materials generally face the problem of unsatisfactory adhesion effects, resulting in the easy failure of the anti-counterfeiting function. This is because the adhesion of most anti-counterfeiting materials is weak and cannot maintain a stable anti-counterfeiting effect during long-term use.

[0004] In addition, existing anti-counterfeiting materials also show deficiencies in terms of light responsiveness and long-term effectiveness. Although some materials have certain light response capabilities, there are still significant technical gaps in dynamic light conversion or reversible luminescent characteristics. Existing materials often cannot flexibly adjust their optical properties according to external light source stimuli and lack sufficient durability and stability. Therefore, the existing technologies cannot meet the requirements for high-stability, high-adhesion, and adjustable light response materials in practical applications.

[0005] In summary, traditional anti-counterfeiting materials face multiple technical problems such as complex preparation processes, poor adhesion effects, and insufficient light responsiveness, which severely restrict their wide applications in multiple fields such as textiles. Summary of the Invention

[0006] Aiming at the above deficiencies in the prior art, the present invention provides a luminescent material with dynamic light conversion, its preparation method and application. The luminescent material with dynamic light conversion provided by the present invention has the characteristics of being activatable, light-responsive, reversibly transformable, and highly stable, effectively solving the problems of poor anti-counterfeiting effects and poor stability of existing anti-counterfeiting substrates on textiles.

[0007] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is: to provide a luminescent material with dynamic light conversion, comprising the following components in parts by weight: 24-25 parts of toluene, 48-49 parts of deionized water, 2-3 parts of Tween-80, 2-3 parts of ethylene glycol, and 0.02-0.04 parts of a single luminescent molecule.

[0008] Further, the above luminescent material with dynamic light conversion comprises the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of deionized water, 2.44 parts of Tween-80, 2.44 parts of ethylene glycol, and 0.034 parts of a single luminescent molecule.

[0009] Further, the single luminescent molecule is an anthraquinone-based single luminescent molecule and / or a non-anthraquinone-based single luminescent molecule.

[0010] Further, the anthraquinone-based single luminescent molecule is one of 2-bromoanthraquinone, 2-ethylanthraquinone, and 2-carboxyanthraquinone.

[0011] Further, the non-anthraquinone-based single luminescent molecule is one of anthracene-7,12-dione, phenanthrenequinone, and 1,3-dibenzoylbenzene.

[0012] Further, the structural formulas of the above molecules are shown as follows, from left to right and from top to bottom are the molecular structural formulas of 2-bromoanthraquinone (AQBr), 2-ethylanthraquinone (AQEt), 2-carboxyanthraquinone (AQCOOH), anthracene-7,12-dione (Tetra), phenanthrenequinone (Phen), and 1,3-dibenzoylbenzene (Dipen):

[0013]

[0014] Further, the preparation method of the above luminescent material with dynamic light conversion comprises the following steps:

[0015] S1. Stir toluene, deionized water, Tween-80, ethylene glycol, and a single luminescent molecule evenly to obtain a first mixed solution;

[0016] S2. Stir toluene, deionized water, Tween-80, ethylene glycol, an anthraquinone-based single luminescent molecule, and sodium hydroxide evenly to obtain a second mixed solution;

[0017] S3. Mix the first mixed solution or the second mixed solution with printing paste to obtain a luminescent material with dynamic light conversion.

[0018] Further, the first mixed solution emits blue-green, green, or yellow fluorescence after continuous illumination.

[0019] Further, the second mixed solution emits red fluorescence after continuous illumination.

[0020] Further, in steps S1 and S2, stir at 24 - 26°C and a rotation speed of 900 - 1100 r / min for 25 - 35 min.

[0021] Further, in steps S1 and S2, stir at 25°C and a rotation speed of 1000 r / min for 30 min.

[0022] Further, in step S2, the mass ratio of sodium hydroxide to the single luminescent molecule is 0.05 - 0.08:0.03 - 0.04.

[0023] Further, in step S2, the mass ratio of sodium hydroxide to the single luminescent molecule is 0.068:0.034.

[0024] Further, in step S3, the mass ratio of the printing paste to the first mixed solution or the second mixed solution is 1:7 - 8.

[0025] Further, in step S3, the mass ratio of the printing paste to the first mixed solution or the second mixed solution is 1:7.

[0026] Further, in step S3, the printing paste is TF - 313CA paste.

[0027] Application of the above luminescent material with dynamic light conversion in paper anti - counterfeiting, preparation of anti - counterfeiting printing on textiles, anti - counterfeiting yarns or anti - counterfeiting seal patterns.

[0028] Further, the method for paper anti - counterfeiting includes the following steps: Write specific letters on the paper with the luminescent material having dynamic light conversion. After flattening and drying, under natural light or ultraviolet light, the paper does not show any letter marks, but when continuously irradiated with ultraviolet light for 5 - 10 s, the letter marks can be shown.

[0029] Further, the anti - counterfeiting printing on textiles is prepared by the following method: Use an aqueous printing plate with a special pattern. First, apply the luminescent material having dynamic light conversion on the squeegee, then hold the squeegee at a 45 - degree angle to the aqueous printing plate and scrape along the same horizontal direction as the printing plate. Repeat scraping in the same direction multiple times to obtain the anti - counterfeiting printing.

[0030] Further, the anti - counterfeiting yarn for textiles is prepared by the following method: Using the soaking method, immerse the fabric cotton thread in the luminescent material having dynamic light conversion, take it out after standing for 1 h, and dry it to obtain the anti - counterfeiting yarn with a dynamically convertible luminescent effect.

[0031] Furthermore, the anti-counterfeiting seal pattern of the textile is prepared by the following method: Design a seal with a specific pattern, use a luminescent material with dynamic light conversion as the printing ink, print it on paper or gauze, and after drying, an anti-counterfeiting seal pattern that shows different luminescence under ultraviolet light irradiation can be obtained.

[0032] Furthermore, the two-dimensional code paper with anti-counterfeiting characteristics is prepared by the following method: Use a luminescent material with dynamic light conversion as the printing ink, print a specific two-dimensional code pattern on the paper, flatten and dry it, and then the two-dimensional code paper with anti-counterfeiting characteristics can be obtained.

[0033] The present invention has the following beneficial effects:

[0034] 1. Through the emulsion template method, the present invention prepares an activatable carbonyl small molecule slurry, which is suitable for anti-counterfeiting applications on substrates such as paper and fabrics, and can obtain delicate samples with specific patterns. The principle of photoactivation is derived from the photoreduction process of carbonyl molecules, that is, single luminescent molecules. Under 365 nm light irradiation, the carbonyl molecules can be transformed from the quinone form to the hydroquinone form, accompanied by the gradual change of the luminescence color from blue to blue-green, green or yellow. In addition, a luminescent material with dynamic light conversion prepared by adding sodium hydroxide to the anthraquinone-based luminescent molecule system will produce red luminescence after photoactivation. The raw materials used in this method are cheap and easily available, without complex synthesis, the luminescence color of the material is distinct, and the photostability is excellent. This kind of dynamic light conversion material is expected to provide new ideas for the anti-counterfeiting field. Description of the Drawings

[0035] Figure 1 is the anti-counterfeiting paper after 10 seconds of activation by visible light and ultraviolet light;

[0036] Figure 2 is the sample diagram of traditional anti-counterfeiting paper-based materials and fabrics prepared with AQ dyes under daylight, ultraviolet light, and after 10 seconds of ultraviolet light activation;

[0037] Figure 3 is the fabric cotton thread with dynamic light switching characteristics made with different dyes;

[0038] Figure 4 is the sample diagram of traditional anti-counterfeiting yarn materials and fabrics prepared with AQ dyes under daylight, ultraviolet light, and after 10 seconds of ultraviolet light activation;

[0039] Figure 5 is the anti-counterfeiting seal pattern and anti-counterfeiting printing made with different dyes;

[0040] Figure 6 is the two-dimensional code paper after ultraviolet light activation;

[0041] Figure 7are the ultraviolet-visible absorption spectra and fluorescence emission spectra of AQEt@NaOH before and after light irradiation;

[0042] Figure 8 is the ultraviolet absorption spectrum of a carbonyl small molecule in dimethyl sulfoxide solvent;

[0043] Figure 9 is the fluorescence emission spectrum of a carbonyl small molecule in dimethyl sulfoxide solvent;

[0044] Figure 10 is the electron paramagnetic resonance spectrum of a carbonyl small molecule in the solid film state;

[0045] Figure 11 is a schematic diagram of different emulsifier contents;

[0046] Figure 12 is a schematic diagram of emulsions with different water-oil ratios;

[0047] Figure 13 is a schematic diagram of the microscopic morphology of emulsion microspheres;

[0048] Figure 14 is a schematic diagram of different luminescent materials with dynamic light conversion after continuous light irradiation for 10 seconds. Specific Embodiments

[0049] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. For those not specified in the examples, they are carried out under conventional conditions or conditions recommended by the manufacturer. For reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0050] Example 1

[0051] A luminescent material with dynamic light conversion, characterized by comprising the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of deionized water, 2.44 parts of Tween-80, 2.44 parts of ethylene glycol, and 0.034 parts of 2-carboxyanthraquinone.

[0052] The preparation method of the above-mentioned luminescent material with dynamic light conversion includes the following steps:

[0053] S1. Stir toluene, deionized water, Tween-80, ethylene glycol, and 2-carboxyanthraquinone at 25°C and a rotation speed of 1000 r / min for 30 min to obtain a first mixed solution;

[0054] S2. Mix the first mixed solution with TF-313CA slurry, and the mass ratio of the printing slurry to the first mixed solution is 1:7 to obtain a luminescent material with dynamic light conversion.

[0055] Example 2

[0056] A luminescent material with dynamic light conversion, characterized by comprising the following components in parts by weight: 24 parts of toluene, 48 parts of deionized water, 2 parts of Tween-80, 2 parts of ethylene glycol, 0.02 part of 2-ethylanthraquinone, and 0.068 part of sodium hydroxide.

[0057] The preparation method of the above luminescent material with dynamic light conversion comprises the following steps:

[0058] S1. Mix toluene, deionized water, Tween-80, ethylene glycol, 2-ethylanthraquinone, and sodium hydroxide at 24 °C and a rotation speed of 900 r / min for 25 min to obtain a second mixed solution.

[0059] S2. Mix the printing paste with the second mixed solution, and the mass ratio of the above TF-313CA paste to the second mixed solution is 1:7 to obtain the luminescent material with dynamic light conversion.

[0060] Example 3

[0061] A luminescent material with dynamic light conversion, characterized by comprising the following components in parts by weight: 25 parts of toluene, 49 parts of deionized water, 3 parts of Tween-80, 3 parts of ethylene glycol, and 0.04 part of 2-ethylanthraquinone.

[0062] The preparation method of the above luminescent material with dynamic light conversion comprises the following steps:

[0063] S1. Mix toluene, deionized water, Tween-80, ethylene glycol, and 2-ethylanthraquinone at 26 °C and a rotation speed of 1100 r / min for 35 min to obtain a first mixed solution.

[0064] S2. Mix the first mixed solution with the TF-313CA paste, and the mass ratio of the above TF-313CA paste to the first mixed solution is 1:8 to obtain the luminescent material with dynamic light conversion.

[0065] Comparative Example 1

[0066] A fluorescent anti-counterfeiting material, comprising the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of deionized water, 2.44 parts of Tween-80, 2.44 parts of ethylene glycol, and 0.034 part of rhodamine B.

[0067] The preparation method of the above fluorescent anti-counterfeiting material comprises the following steps:

[0068] S1. Mix toluene, deionized water, Tween-80, ethylene glycol, and rhodamine evenly.

[0069] Comparative Example 2

[0070] The difference between Comparative Example 2 and Example 1 is that Comparative Example 3 includes the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of water, 1 part of Tween-80, 2.44 parts of ethylene glycol, and 0.02 part of a single luminescent molecule.

[0071] Comparative Example 3

[0072] The difference between Comparative Example 3 and Example 1 is that Comparative Example 3 includes the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of water, 4 parts of Tween-80, 2.44 parts of ethylene glycol, and 0.02 part of a single luminescent molecule.

[0073] Comparative Example 4

[0074] The difference between Comparative Example 4 and Example 1 is that the mass ratio of toluene to deionized water is 3:1.

[0075] Comparative Example 5

[0076] The difference between Comparative Example 5 and Example 1 is that the mass ratio of toluene to deionized water is 5:1.

[0077] Test Example 1

[0078] Test the anti-counterfeiting effect of the luminescent material with dynamic light conversion prepared in Example 1 and the fluorescent anti-counterfeiting material prepared in Comparative Example 1 on paper, and detect their luminescence under natural light and ultraviolet light. The results are as Figure 1 and Figure 2 shown, where Figure 1 is the anti-counterfeiting effect of the luminescent material with dynamic light conversion prepared by the method provided by the present invention on paper, Figure 1 in which, (A) is the luminescent material with dynamic light conversion under visible light, and (B) and (C) are the luminescent materials with dynamic light conversion under ultraviolet light. Figure 2 is the anti-counterfeiting effect of the fluorescent anti-counterfeiting materials provided by Comparative Example 1 and Example 1 on paper. Among them, (A) is the effect of the fluorescent anti-counterfeiting material prepared in Comparative Example 1 under natural light, (B) is the effect of the fluorescent anti-counterfeiting material prepared in Comparative Example 1 under ultraviolet light irradiation, and (C) is the effect of the fluorescent anti-counterfeiting material prepared in Comparative Example 1 after 10 s of ultraviolet light irradiation; (D) is the effect of the luminescent material with dynamic light conversion prepared in Example 1 under natural light, (E) is the effect of the luminescent material with dynamic light conversion prepared in Example 1 under ultraviolet light irradiation, and (F) is the effect of the luminescent material with dynamic light conversion prepared in Example 1 after 10 s of ultraviolet light irradiation.

[0079] From Figure 1 and Figure 2It can be seen that the photoluminescence properties of the carbonyl molecular slurry enable the material to emit multiple colors on the paper. When exposed to ultraviolet or visible light, no marks can be seen on the paper with the naked eye. However, after 10 seconds of photoactivation, obvious fluorescence appears. The fluorescent anti-counterfeiting material prepared in Comparative Example 1 does not emit light in the natural light environment but emits fluorescence in the ultraviolet light environment. Moreover, after photoactivation, the fluorescent color does not change. The fluorescent anti-counterfeiting material prepared in Comparative Example 2 appears colorless in natural light and does not emit light immediately in the ultraviolet light environment. However, after continuous ultraviolet light activation, it releases bright green fluorescence, and this fluorescence is reversible. After standing for a period of time, this luminescence will disappear naturally and show the same luminescence effect after repeated excitation.

[0080] Test the anti-counterfeiting effects of the prepared luminescent materials with dynamic light conversion and the fluorescent anti-counterfeiting materials prepared in Comparative Examples 1-2 on the yarns. The results are as Figure 3 and Figure 4 shown. Among them, Figure 3 is the effect of the anti-counterfeiting yarn prepared with the luminescent material with dynamic light conversion provided by the present invention. Figure 3 In Figure 4 , (A)-(F) are respectively the fabric cotton threads soaked with the luminescent material with dynamic light conversion prepared in Example 1.

[0081] From Figure 3 and Figure 4 it can be seen that for the yarn soaked with the fluorescent anti-counterfeiting material prepared in Comparative Example 1, the yarn shows the white color of the yarn itself under the sunlight lamp, and shows the red luminescence of rhodamine B under ultraviolet light and continuous light illumination. In contrast, the yarn soaked with the luminescent material with dynamic light conversion prepared in Example 1 shows the white color of the yarn itself under natural light. After 20 seconds of light illumination, the yarn shows green luminescence. The photoluminescent yarn can be used as a characteristic yarn and combined with ordinary yarns for sewing, which can play a personalized anti-counterfeiting function. The luminescence of this yarn is invisible under daily light illumination, and it can also be ornamental itself. Moreover, it will show colors under specific light source illumination, realizing invisible anti-counterfeiting. The luminescent material with dynamic light conversion provided by the present invention still has anti-counterfeiting advantages.

[0082] Test the application of the luminescent material with dynamic light conversion prepared in Example 1 on the fabric. Taking the white fabric as an example, the results are as Figure 5 shown. (A)-(D) are respectively the luminescence situations of the luminescent material with dynamic light conversion prepared in Example 1 on different fabrics.

[0083] FromFigure 5 It can be seen that different prints emit multiple colors under the excitation of light at a specific wavelength. The fabric is white under natural light and shows blue-violet under instantaneous irradiation with an ultraviolet lamp, which exhibits the same photophysical properties as ordinary daily clothing. However, as the irradiation time increases, the printed patterns will emit light, not only achieving an anti-counterfeiting effect,

[0084] If a more precise experimental mold is used, an anti-counterfeiting QR code pattern can be made, such as Figure 6 shown.

[0085] In summary, the luminescent material with dynamic light conversion provided by the present invention has the characteristics of activatable type and dynamic light switching.

[0086] Test Example 2

[0087] Diethyl anthraquinone (AQEt) was selected as the model compound. Sodium hydroxide (NaOH) was added to the single luminescent molecule AQEt, and the mass ratio of NaOH to AQEt was 0.068:0.034. After stirring evenly, the material AQEt@NaOH was prepared. Spectral tests were carried out on AQEt@NaOH, and the results are as Figure 7 shown.

[0088] It can be seen from Figure 7 that after 10 s of light irradiation, its absorption spectrum shows obvious differences. The fluorescence spectrum shows red luminescence, which is mainly due to the influence of NaOH on the carbonyl structure and electronic structure.

[0089] Anthraquinone (AQ), 2-bromoanthraquinone (AQBr), 2-ethylanthraquinone (AQEt), 2-carboxyanthraquinone (AQCOOH), anthracene-7,12-dione (Tetra), phenanthraquinone (Phen), and 1,3-dibenzoylbenzene (Dipen) were selected as model compounds, and their photophysical properties were further explored by ultraviolet absorption spectra and fluorescence emission spectra. The results are as Figure 8 shown, Figure 8 in which the left figure is the ultraviolet absorption spectrum, and the right figure is the ultraviolet absorption spectrum after continuous irradiation with a 365 nm ultraviolet lamp for 10 s.

[0090] It can be seen from Figure 8 that in the ultraviolet light spectrum, the absorption peak positions of the molecules of AQBr, AQEt, AQCOOH, Tetra, Phen, and Dipen are around 275 nm, and the maximum absorption peak is around 325 nm. After continuous irradiation with a 365 nm ultraviolet lamp for 10 s, the absorption peak at 325 nm of most molecules decreased significantly. The unique wavelength change of Tetra is due to its different electronic structure from other molecules, but it still belongs to a hydrogen abstraction reaction during light irradiation.

[0091] The luminescence behaviors of 2-bromoanthraquinone (AQBr), 2-ethylanthraquinone (AQEt), 2-carboxyanthraquinone (AQCOOH), anthracene-7,12-dione (Tetra), phenanthraquinone (Phen), and 1,3-dibenzoylbenzene (Dipen) were further studied by fluorescence spectroscopy, and the results are as Figure 9 shown, Figure 9 in which, from left to right and from top to bottom, they are AQ, AQBr, AQCOOH, AQEt, Phen, and Dipen in turn.

[0092] It can be Figure 9 seen that after continuous photoactivation, the quinone derivatives basically all show fluorescence emission at approximately 500 nm, corresponding to the blue-to-green transition, and this transition is reversible. Due to the presence of oxygen in the environment, the photoreduced samples can recover by themselves after being exposed to air for a period of time. Purging oxygen into the samples can accelerate the occurrence of the oxidation reaction. It should be noted that although the Phen molecule does not show an obvious spectral shift, this is mainly related to the aggregation-induced quenching (ACQ) property of the molecule, and it has an obvious luminescence color change in the dilute solution state in benzene solvent.

[0093] Electron paramagnetic resonance spectroscopy was used to prove the generation of photoinduced anthraquinone radical intermediates. To facilitate the testing and prove the feasibility of the photoreduction process occurring in the solid state, the EPR spectra were measured for AQBr and AQEt molecules in the thin film state, and the results are as Figure 10 shown.

[0094] It can be Figure 9 and Figure 10 seen that after illumination, the radical signal is generated, which corroborates the occurrence of the photoreduction process. After the reduction process occurs, the radical molecules undergo disproportionation reactions, leading to the formation of hydroquinone molecules and accompanied by relatively bright fluorescence emission. Therefore, it can be known that the carbonyl molecules have photoreduction behavior.

[0095] Test Example 3

[0096] To test the influence of different mass percentages of Tween-80 on the emulsification effect, the mixed liquids generated in Example 1, Comparative Example 2, and Comparative Example 3 were compared, and the results are as Figure 11 shown.

[0097] It can be Figure 11It can be seen that when the mass percentage of Tween-80 is 1%, after stirring and standing, the emulsion template shows a layering phenomenon and cannot form an oil-in-water state, indicating that at a mass ratio of 1%, the content of Tween-80 is too low to make the immiscible water and oil phases miscible. When the mass percentages are 2.44% and 4%, a stable oil-in-water state can be formed. Emulsions can be formed when the mass percentages of Tween-80 are 2.44% and 4%, but after standing for 24 h, slight demulsification occurs in the sample with a Tween-80 content of 4%. Therefore, the optimal mass percentage of Tween-80 is 2.44%.

[0098] Test Example 4

[0099] To test the influence of different ratios of toluene and deionized water (water-oil ratio) on the emulsification effect, the mixed liquids generated in Example 1, Comparative Example 4, and Comparative Example 5 were compared, and the results are as Figure 11 shown.

[0100] It can be seen from Figure 12 that when the mass ratio of toluene to deionized water is 2:1, an oil-in-water emulsion can be formed. When the mass ratio of toluene to deionized water is 3:1 or 5:1, the water and oil are layered, indicating that as the water content increases, the concentration of the emulsifier in the water phase gradually decreases, the adsorption amount at the oil-water interface decreases, resulting in a decrease in the stability of the emulsion, the rupture of emulsion microspheres, and obvious layering, especially when the ratio is 5:1. Therefore, the water-oil ratio should not be too large.

[0101] The microscopic morphology of the emulsion was observed by an optical microscope, and the results are as Figure 13 shown.

[0102] It can be seen from Figure 13 that the emulsion microspheres are relatively evenly dispersed in the solution. During the experiment, due to the extrusion effect of the cover glass, some microspheres are ruptured, which is a normal phenomenon.

[0103] Test Example 5

[0104] Schematic diagrams of the luminescent materials with dynamic light conversion prepared in Examples 1-3 after being photoactivated are as Figure 14 shown, and the results of Example 1, Example 2, and Example 3 are shown from left to right in sequence.

[0105] It can be seen from Figure 14 that this behavior is reversible. During the stirring process, the water and oil phases spontaneously organize to form an emulsion system with encapsulated radical molecules, that is, a carbonyl molecular emulsion. In addition, due to the formation of microspheres, small molecules can be evenly dispersed in the emulsion system, reducing the luminescence quenching phenomenon caused by aggregation.

[0106] In summary, the present invention uses a method of combining a slurry with a carbonyl molecular emulsion to obtain a carbonyl molecular emulsion slurry. The thickener in the base slurry acts as a transfer medium, which can increase the dye coloring amount, improve the contour clarity and vividness. Mixing the emulsion with the base slurry of the slurry can increase the viscosity of the emulsion, make the printing beautiful and have a better coloring effect. Applying the carbonyl molecular emulsion slurry to paper and textiles can obtain paper or textile materials with different luminescence.

[0107] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A luminescent material with dynamic light conversion, characterized in that: The invention comprises the following components in parts by weight: 24-25 parts of toluene, 48-49 parts of deionized water, 2-3 parts of Tween-80, 2-3 parts of ethylene glycol and 0.02-0.04 parts of a single luminescent molecule.

2. The luminescent material with dynamic light conversion according to claim 1, characterized in that: The composition comprises the following components in parts by weight: 24.4 parts of toluene, 48.76 parts of deionized water, 2.44 parts of Tween-80, 2.44 parts of ethylene glycol and 0.034 parts of a single luminescent molecule.

3. The luminescent material with dynamic light conversion according to claim 1, characterized in that: The single luminescent molecule is an anthraquinone single luminescent molecule and / or a non-anthraquinone single luminescent molecule; The anthraquinone single luminescent molecule is one of 2-bromoanthraquinone, 2-ethylanthraquinone and 2-carboxylanthraquinone; The non-anthraquinone single luminescent molecule is one of anthracene-7,12-dione, phenanthrenequinone and 1,3-dibenzoylbenzene.

4. The method for preparing a luminescent material with dynamic light conversion according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Mix toluene, deionized water, Tween-80, ethylene glycol and a single luminescent molecule to obtain a first mixed solution; S2, mixing toluene, deionized water, Tween-80, ethylene glycol, anthraquinone single luminescent molecule and sodium hydroxide to obtain a second mixed solution; S3, mixing the first mixed liquid or the second mixed liquid with the printing paste to obtain a luminescent material with dynamic light conversion.

5. The method for preparing a luminescent material with dynamic light conversion according to claim 4, characterized in that: In step S1 and step S2, stirring is performed at 24-26° C. and 900-1100 r / min for 25-35 min.

6. The method for preparing a luminescent material with dynamic light conversion according to claim 4, characterized in that: In step S2, the mass ratio of the sodium hydroxide to the first luminescent molecule is 0.05-0.08:0.02-0.

04.

7. The method for preparing a luminescent material with dynamic light conversion according to claim 4, characterized in that: In step S3, the mass ratio of the printing paste to the first mixed liquid or the second mixed liquid is 1:7-8.

8. Use of the luminescent material with dynamic light conversion according to any one of claims 1 to 3 in paper anti-counterfeiting, preparation of anti-counterfeiting prints on textiles, anti-counterfeiting yarns or anti-counterfeiting stamps.

Images