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A time-sensitive room temperature phosphorescent anti-counterfeiting material and its preparation method and application

A room-temperature phosphorescent and time-sensitive technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high cost, inconvenient use, and uncontrollable phosphorescence intensity and timeliness, and achieve the effect of low cost and easy processing

Active Publication Date: 2021-08-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthesis of the reported monomer compounds is complicated, the cost is high, and the phosphorescence intensity and timeliness cannot be controlled, so it is very inconvenient to use
Especially in the field of anti-counterfeiting, the anti-counterfeiting level has been reduced

Method used

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  • A time-sensitive room temperature phosphorescent anti-counterfeiting material and its preparation method and application
  • A time-sensitive room temperature phosphorescent anti-counterfeiting material and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1. A method for preparing a time-sensitive room temperature phosphorescent anti-counterfeiting material, comprising the following steps:

[0038] Prepared by solution molding method, acridone and water-absorbing polymer polyacrylamide are dissolved in solvent water, the mass ratio of acridone and polyacrylamide is controlled to be 1:4000, and the mass fraction of acridone solution is 0.1%. , and then heated and evaporated at 100°C to remove the solvent water to obtain a time-sensitive room temperature phosphorescent anti-counterfeiting material. Such as figure 1 As shown, the room-temperature phosphorescent anti-counterfeiting material exhibits blue fluorescence under ultraviolet light, and a long-lived green phosphorescence appears after the light is turned off, and the room-temperature phosphorescent anti-counterfeiting material will gradually lose phosphorescence when exposed to air with a relative humidity of 50%. The purpose of effective screening is the real fact...

Embodiment 2

[0040] 1. A method for preparing a time-sensitive room temperature phosphorescent anti-counterfeiting material, comprising the following steps:

[0041] Prepared by solution swelling method, dissolving acriflavine hydrochloride in water to form an aqueous solution of acriflavine hydrochloride with a mass fraction of 0.03%, using a water-absorbing polymer polyacrylamide film as a substrate, and acriflavine Hydrochloride aqueous solution is used as ink for inkjet printing; after printing out the pattern, dry the pattern at 90°C for 1 hour, and then seal it with plastic to form a pattern such as figure 2 The green fluorescence-green phosphorescence pattern shown. When the sealed bag is opened, the phosphorescent properties will gradually disappear within 2 hours, and the fluorescent properties will not change significantly, achieving the anti-counterfeiting goal of identifying whether the product packaging has been opened.

Embodiment 3

[0043] 1. A method for preparing a time-sensitive room temperature phosphorescent anti-counterfeiting material, comprising the following steps:

[0044]Prepared by solution swelling method, dissolving acriflavine hydrochloride in water to form an aqueous solution of acriflavine hydrochloride with a mass fraction of 0.01%, using a water-absorbing polymer polyacrylamide film as a substrate, and acriflavine The aqueous hydrochloride solution was used as the ink for inkjet printing; after the pattern was printed, the pattern was dried at 90°C for 1 hour, and sealed with plastic to form a pattern such as figure 2 The green fluorescence-green phosphorescence pattern shown. After the sealed bag is opened, the phosphorescent properties will gradually disappear within 2 to 3 hours, while the fluorescent properties will not change significantly.

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Abstract

The invention discloses a time-sensitive room temperature phosphorescence anti-counterfeiting material, a preparation method and an application thereof. In the present invention, the room-temperature phosphorescent substance is compounded into the water-absorbing polymer to obtain a time-sensitive long-life room-temperature phosphorescent polymer material; the room-temperature phosphorescent substance is selected from acridine and its derivatives, phthalic acid and its Derivatives, or one or more of melamine and its derivatives; the water-based polymer is selected from polyacrylic resin, cellulose and its derivatives, polyvinylpyrrolidone, polyvinyl alcohol, polymaleic anhydride, polyquaternary amine One or more of salt or polyethylene glycol. The construction of the anti-counterfeiting label is simple and effective, and the time-sensitive room temperature phosphorescent anti-counterfeiting can be quickly realized, and it can effectively identify whether the package has been opened and the real delivery time of the product. Moreover, the present invention can be obtained through a water-based printing process, which has great advantages in terms of cost and environmental friendliness.

Description

technical field [0001] The invention belongs to the technical field of optical anti-counterfeiting materials. More specifically, it relates to a time-sensitive room temperature phosphorescent anti-counterfeiting material and its preparation method and application. Background technique [0002] Optical anti-counterfeiting is one of the most important anti-counterfeiting means. A large number of products on the market use anti-counterfeiting trademarks, especially in the tobacco, wine and cosmetics industries. However, conventional anti-counterfeiting trademarks cannot be time-sensitive, that is, whether the product packaging has been opened or not, and the function of marking the real delivery time of the product. [0003] Compared with fluorescence, phosphorescence has a larger Stokes shift, which can avoid the interference of excitation light. At the same time, phosphorescence has a longer lifetime, which can avoid the interference of short-lived fluorescence and scattere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02
CPCC09K11/02
Inventor 洪炜
Owner SUN YAT SEN UNIV
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