Preparation method of red, green and blue three-primary-color orthogonal up-conversion fluorescent safe ink

A technology of three primary colors, red, green and blue, applied in chemical instruments and methods, inks, luminescent materials, etc., can solve the problems of unsatisfactory information protection, lack of effective protection of anti-counterfeiting patterns, and easy to be copied, so as to avoid background fluorescence interference Effect

Active Publication Date: 2020-11-06
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of fluorescent anti-counterfeiting ink based on single-stage anti-counterfeiting technology can be replaced by luminescent materials with similar emission characteristics, resulting in the lack of effective protection of information in the anti-counterfeiting pattern, making it unsatisfactory in information protection, low anti-counterfeiting performance, and easy to be detected. counterfeit

Method used

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  • Preparation method of red, green and blue three-primary-color orthogonal up-conversion fluorescent safe ink
  • Preparation method of red, green and blue three-primary-color orthogonal up-conversion fluorescent safe ink
  • Preparation method of red, green and blue three-primary-color orthogonal up-conversion fluorescent safe ink

Examples

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Embodiment 1

[0029] The preparation method of trichromatic orthogonal luminescent five-layer core-shell structure nanoparticles, the specific steps are as follows:

[0030] (1)NaYF 4 : Synthesis of Yb / Tm core nanoparticles. Take a 50mL two-necked round-bottomed flask as a reaction vessel, and a total amount of 0.4mmol of Y(CH 3 COO) 3 (69.5%), Yb(CH 3 COO) 3 (30%) and Tm(CH 3 COO) 3 (0.5%) aqueous solution was added with 3 mL of oleic acid and 7 mL of octadecene, and the resulting mixture was stirred at 150° C. for 60 minutes to remove water and low-boiling solvent molecules to form an oleic acid complex precursor. After cooling the resulting mixture to room temperature, 4 mL of NH 4 F (0.4moL / L) and 2mL NaOH (0.5moL / L) in methanol solution, heated to 50°C and continuously stirred for 30 minutes, then heated to 100°C and kept under vacuum for 10 minutes to remove methanol, then inert gas Under protection, the temperature was raised to 290° C. for 90 minutes. After the reaction was...

Embodiment 2

[0036] Example 2: Preparation of hydrophilic trichromatic orthogonal luminescent five-layer core-shell nanoparticle.

[0037] Disperse the trichromatic orthogonal luminescent nanoparticles wrapped by oleic acid into a mixed solution of 1ml ethanol and 1ml hydrochloric acid (2M), and then centrifuge at a speed of 16000r / min for 20min to remove the oleic acid ligands on the surface of the nanoparticles to obtain The ligand-free nanoparticles on the surface were washed twice with ethanol and finally redispersed in deionized water.

Embodiment 3

[0038] Embodiment 3: Preparation of acid-base indicator thymolphthalein solution. Weigh 0.1 g of thymolphthalein, dissolve it in 100 ml of ethanol with a volume fraction of 90%, and wait until it is completely dissolved by ultrasonication.

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Abstract

The invention discloses a preparation method of red, green and blue three-primary-color orthogonal up-conversion fluorescent safe ink and belongs to the technical field of nanometer optical anti-counterfeiting. The method comprises the following steps of: preparing nanoparticles with red, green and blue orthogonal up-conversion luminescence by using a full-automatic nano synthesizer through a layer-by-layer wrapping method; carrying out surface treatment on the obtained nanoparticles to obtain water-soluble nanoparticles; finally adding the water-soluble nanoparticles into an acid-base indicator according to a certain proportion, and carrying out uniform ultrasonic dispersion to obtain the safe ink. The safe ink prepared by the method can be used for obtaining an anti-counterfeiting pattern through printing, stamping, ink-jet printing, handwriting and the like; and the pattern obtained by the safe ink has the characteristics of three-primary-color fluorescence display, good pH stimulation responsiveness, good stability and the like, and can be used for multistage anti-counterfeiting application.

Description

technical field [0001] The invention relates to a preparation method of red, green and blue trichromatic orthogonal up-conversion fluorescent security ink, which belongs to the technical field of nano optical anti-counterfeiting. Background technique [0002] Information security has become an important issue in today's society. Therefore, anti-counterfeiting technology is playing an increasingly important role in politics, economy, military fields and our daily life. According to statistics, in the past few decades, governments and companies around the world have spent tens of millions of dollars on research and development of information protection and anti-counterfeiting technologies. Various anti-counterfeiting technologies, including fluorescent anti-counterfeiting, nuclear track anti-counterfeiting, laser holographic anti-counterfeiting and magnetic anti-counterfeiting, have been widely used in currency, labels and important documents. Among them, due to the advantage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09K11/85C09K11/02
CPCC09D11/50C09K11/02C09K11/7773
Inventor 秦伟平贾恒李大光崔皓秦冠仕赵丹尹升燕狄卫华贾志旭
Owner JILIN UNIV
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