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Halide-based full-color fluorescent encryption ink and its application method

An application method, halide technology, applied in the field of nano-fluorescent materials, can solve the problems of limited storage information capacity, singleness, unsatisfactory encryption ink, etc., and achieve the effect of increasing storage capacity and expanding sources

Active Publication Date: 2021-08-31
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this material is not ideal as an encryption ink. The ideal encryption ink should not be detected under any circumstances unless a specific color development method is used.
Recently, stimuli-responsive perovskite quantum dots are used as fluorescent inks in the field of anti-counterfeiting and encryption. The encrypted information is first written or printed by lead-based metal-organic frameworks, and then luminescent perovskites are generated by spraying methyl ammonium bromide to achieve UV light. Color development, and then achieve color protection by spraying methanol. This method realizes the encryption of information very well, but this method can only realize the display of a single color, so the displayed information has great limitations. The capacity is also limited (Conversion of invisible metal-organic frameworks to luminescent perovskite nanocrystals for confidential information encryption and decryption. Nature Communications, 2017, 8, 1138.)

Method used

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  • Halide-based full-color fluorescent encryption ink and its application method
  • Halide-based full-color fluorescent encryption ink and its application method
  • Halide-based full-color fluorescent encryption ink and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The first step is to synthesize red, green and blue (RGB) ink

[0046] Synthesis of R: Dissolve 1 mmol of zinc iodide, 2.2 mmol of zinc bromide and 0.05 g of polyvinylpyrrolidone (PVP) in a mixed solution consisting of 5 ml of pure water, 1 ml of ethanol and 0.3 ml of ethylene glycol.

[0047] Synthesis of G: Dissolve 0.1 mmol of zinc iodide, 1 mmol of zinc bromide and 0.05 g of polyvinylpyrrolidone (PVP) in a mixed solution consisting of 5 ml of pure water, 1 ml of ethanol and 0.3 ml of ethylene glycol.

[0048] Synthesis of B: Dissolve 1 mmol of zinc bromide, 0.7 mmol of zinc chloride and 0.05 g of polyvinylpyrrolidone (PVP) in a mixed solution consisting of 5 ml of pure water, 1 ml of ethanol and 0.3 ml of ethylene glycol.

[0049] Filter the colorless and transparent RGB ink with a 0.22 micron filter head, and fill the three inks into corresponding empty tri-color ink cartridges ( figure 2 b, where the top is three kinds of ink, and the bottom is the printer) (was...

Embodiment 2

[0058] Except in the first step, used iodide zinc iodide changes manganese iodide into, other are with embodiment 1. After changing zinc iodide to manganese iodide, the luminescent properties and encrypted information remain unchanged, indicating that the change of salt will not affect the encryption and decryption process.

Embodiment 3

[0060] Except in the first step, used bromide zinc bromide changes manganese bromide into, other are with embodiment 1. After changing zinc bromide to manganese bromide, there is no change in the luminescent properties and encrypted information, indicating that the change of salt will not affect the encryption and decryption process.

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Abstract

The invention is a halide-based full-color fluorescent encryption ink and an application method thereof. The preparation of the red, green and blue three primary color inks of this ink comprises the steps: red primary color ink: adding bromine-containing compound, iodine-containing compound and polyvinylpyrrolidone to the first mixed solvent; green primary color ink: bromine-containing Compound, iodine-containing compound and polyvinylpyrrolidone are added in the second mixed solvent; Blue color ink: bromine-containing compound, chlorine-containing compound and polyvinylpyrrolidone are added in the third mixed solvent; the red, green and The three primary color inks of blue are packed in a tri-color ink cartridge, which is used as a print cartridge for thermal inkjet printers. The present invention adopts the reverse anion strategy, which can realize full-color fluorescent information display at the same time. Compared with the single-color fluorescent mode, the storage capacity of information is increased, and a lot of complex pattern information can be displayed.

Description

technical field [0001] The invention belongs to the technical field of nano fluorescent materials, and in particular relates to the use of halide inks to encrypt information and an all-inorganic perovskite quantum dot solution as a color developer to obtain full-color anti-counterfeiting patterns. Background technique [0002] Currently, there are two main types of common color inkjet printers, piezoelectric inkjet and thermal inkjet. The two printers produce ink droplets in different ways, but they all spray the ink of the three colors in the printer according to a certain proportion to form a color pattern. The ink of the three colors is generally composed of colored organic dyes, additives and solvents. composition. [0003] With the improvement of people's security awareness, the application of security protection such as information storage, anti-counterfeiting, and encryption has attracted more and more attention. The protection of luxury goods, diplomas, certificate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/50C09D11/30C09D11/40
CPCC09D11/30C09D11/40C09D11/50
Inventor 孙春毕文刚苏思静徐庶耿翀郜志媛刘晗欣王乐
Owner HEBEI UNIV OF TECH