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Long-afterglow nanoparticle with fluorescence encryption anti-counterfeiting characteristics, and preparation method thereof

A nanoparticle, long afterglow technology, applied in nanotechnology, nanotechnology, nanooptics and other directions for materials and surface science, can solve the problems of low encryption, poor concealment, etc., achieve high encryption, easy operation, image Highly recognizable effect

Active Publication Date: 2020-09-01
HANSHAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the existing fluorescent anti-counterfeiting ink materials, such as low encryption and poor concealment, the present invention provides a long-lasting nanoparticle with fluorescence encryption anti-counterfeiting properties, its preparation method and its application as fluorescent anti-counterfeiting ink

Method used

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  • Long-afterglow nanoparticle with fluorescence encryption anti-counterfeiting characteristics, and preparation method thereof
  • Long-afterglow nanoparticle with fluorescence encryption anti-counterfeiting characteristics, and preparation method thereof
  • Long-afterglow nanoparticle with fluorescence encryption anti-counterfeiting characteristics, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of ZnAl with fluorescent encryption anti-counterfeiting properties 1.39 Cr 0.01 Ge 0.3 o 3.7 The preparation method of nanoparticle, concrete steps are as follows:

[0035] (1) Weigh the material according to the molar ratio of Zn ions, Al ions, Ge ions and Cr ions as 1:1.39:0.3:0.01. Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O and Cr(NO 3 ) 3 9H 2 O is dissolved in water to prepare zinc nitrate solution, aluminum nitrate solution and chromium nitrate solution; the molar concentration of zinc nitrate solution is 0.2mol / L, the molar concentration of aluminum nitrate solution is 0.2mol / L, and the molar concentration of chromium nitrate solution 5mmol / L; the GeO 2 Disperse in water, add ammonia water dropwise and stir thoroughly to form a germanium solution with a molar concentration of 0.1mol / L. Mix zinc nitrate solution, aluminum nitrate solution, germanium solution and chromium nitrate solution, and adjust the pH value to 8.5 with ammonia water, and the...

Embodiment 2

[0040] A kind of ZnAl with fluorescent encryption anti-counterfeiting properties 1.39 Cr 0.01 Ge 0.3 o 3.7 The preparation method of nanoparticle, concrete steps are as follows:

[0041] (1) Weigh the material according to the molar ratio of Zn ions, Al ions, Ge ions and Cr ions as 1:1.39:0.3:0.01. Zn(CH 3 COO) 2 , Al(NO 3 ) 3 9H 2 O and Cr(NO 3 ) 3 9H 2 O is dissolved in water to prepare zinc acetate solution, aluminum nitrate solution and chromium nitrate solution; the molar concentration of zinc nitrate solution is 0.2 mol / L, the molar concentration of aluminum nitrate solution is 0.2 mol / L, and the molar concentration of chromium nitrate solution 5mmol / L; the GeCl 4 Dissolve in dilute hydrochloric acid to make a germanium tetrachloride solution with a molar concentration of 0.1mol / L. Mix zinc acetate solution, aluminum nitrate solution, germanium tetrachloride solution and chromium nitrate solution, adjust the pH value to 8.5 with ammonia water, and then add i...

Embodiment 3

[0044] A kind of ZnAl with fluorescent encryption anti-counterfeiting properties 1.4 Ge 0.3 o 3.7 The preparation method of nanoparticle, concrete steps are as follows:

[0045] (1) Weigh the material according to the molar ratio of Zn ions, Al ions and Ge ions as 1:1.4:0.3. Zn(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O is dissolved in water to form a zinc nitrate solution and an aluminum nitrate solution; the molar concentration of the zinc nitrate solution is 0.2mol / L, and the molar concentration of the aluminum nitrate solution is 0.2mol / L; the GeO 2 Disperse in water, drop into ammonia water and stir well to form a germanium solution with a molar concentration of 0.1mol / L. Zinc nitrate solution, aluminum nitrate solution and germanium solution are mixed, and the pH value is adjusted to 8.5 with ammonia water, and then added to a hydrothermal kettle with a polytetrafluoroethylene liner, wherein the filling degree of the hydrothermal kettle is 0.45, and the temperature...

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Abstract

The invention provides a long-afterglow nanoparticle with fluorescence encryption anti-counterfeiting characteristics, and a preparation method thereof. The long-afterglow nanoparticle is composed oftwo nanoparticles, namely a ZnAlxGeyO(2+3x+4y) / 2 nanoparticle serving as interference information and a ZnAlx-zCrzGeyO(2+3x+4y) / 2 nanoparticle serving as anti-counterfeiting information, wherein x isgreater than 0 and less than or equal to 2, y is greater than 0 and less than or equal to 1, z is greater than 0 and less than or equal to 0.3, and z is less than x; the ZnAlx-zCrzGeyO(2+3x+4y) / 2 nanoparticle emits visible light under the excitation of ultraviolet light, and emits near-infrared light under the stop of the excitation of the ultraviolet light; and the ZnAlxGeyO(2+3x+4y) / 2 nanoparticle emits visible light under the excitation of ultraviolet light, and does not emit light when the excitation of the ultraviolet light is stopped. A fluorescent anti-counterfeiting ink can be preparedby utilizing different optical characteristics of the two nanoparticles, digital anti-counterfeiting and two-dimensional code anti-counterfeiting application of fluorescent encryption is realized, the encryption and anti-counterfeiting processes are easy to operate, the encryption degree is high, the encryption stability is high, the anti-counterfeiting concealment is strong, and the identification degree is high.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting materials, and in particular relates to a long-lasting nano-particle with fluorescence encryption anti-counterfeiting properties, its preparation method and application. Background technique [0002] With the rapid development of market economy and information technology, some traditional anti-counterfeiting methods are constantly being cracked by criminals. The improvement and transformation of anti-counterfeiting technology has become inevitable, and emerging anti-counterfeiting technologies are constantly becoming green and intelligent. Compared with traditional light-changing anti-counterfeiting inks and ultraviolet developing inks, fluorescent anti-counterfeiting inks are widely used in high-level anti-counterfeiting such as confidential documents, securities, and anti-cancer drugs because of their advantages such as good stability, high difficulty in copying, and multiple anti-cou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68C09K11/66G09F3/00C09D11/50B82Y30/00B82Y20/00
CPCC09K11/682C09K11/662G09F3/0294C09D11/50B82Y20/00B82Y30/00Y02B20/00
Inventor 张毅黄锐李洪亮林圳旭宋捷郭艳青杨庆姚婧张珊
Owner HANSHAN NORMAL UNIV
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