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Fluorescent material and preparation method thereof, and anti-counterfeit package film

A fluorescent material and substrate technology, applied in the field of fluorescent anti-counterfeiting, can solve problems such as uneven mixing of raw materials, high hardness of products, long calcination temperature and calcination time, and achieve the effect of improving fluorescence performance

Inactive Publication Date: 2018-12-14
ZHANGJIAGANG WUHU NEW MATERIAL TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Fluorescent materials in traditional inks usually require higher calcination temperature and longer calcination time, resulting in uneven mixing of raw materials, high hardness and coarse particles of the product

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] The embodiment of the present application discloses a method for preparing a fluorescent material, including steps:

[0021] (1), coating titanium dioxide particle on mica surface, prepares mica titanium material;

[0022] (2), mixing mica titanium, calcium nitrate, and praseodymium nitrate under the action of ultrasonic waves;

[0023] (3) Calcining, the calcination temperature is 890-920° C., and the calcination time is 120-140 minutes to obtain the fluorescent material.

[0024] In step (1), the mica powder is dispersed in distilled water to prepare a suspension; the temperature is raised and heated in a water bath at 85-90° C., and the pH value is adjusted to 2.0-2.2; the compound solution containing titanium is added and reacted for 2-4 hours; washing and drying to obtain mica titanium material.

[0025] The titanium-containing compound is titanium tetrachloride, titanyl sulfate or a mixture thereof.

[0026] The application also discloses an anti-counterfeiting...

Embodiment 1

[0029] Preparation of mica titanium material: Disperse mica powder in distilled water to prepare a suspension; heat up in a water bath at 90°C, adjust the pH value to 2.0 by hydrochloric acid with a concentration of 6.0mol / L; add titanyl sulfate solution, and react 4 hours; washing and drying to obtain mica titanium material.

[0030] The titanium mica material, calcium nitrate, praseodymium nitrate and ethanol were mixed and dispersed under the action of ultrasonic waves for 20 minutes, heated to 90° C. and kept for 10 minutes.

[0031] In the muffle furnace, the temperature was further raised to 900° C. for calcination, and the calcination time was 120 minutes to obtain the target product.

[0032] Morphological analysis by SEM shows that the surface of the obtained material is flat and smooth, and the particle size distribution is about 25 μm; under laser excitation, the average lifetime of fluorescence is about 180 μs.

Embodiment 2

[0034] Preparation of mica titanium material: Disperse mica powder in distilled water to prepare a suspension; heat up in a water bath at 90°C, and adjust the pH value to 2.2 by hydrochloric acid with a concentration of 4.0mol / L; add titanium tetrachloride solution, and React for 4 hours; wash and dry to obtain mica titanium material.

[0035] The titanium mica material, calcium nitrate, praseodymium nitrate and ethanol were mixed and dispersed under the action of ultrasound for 20 minutes, heated to 100°C and kept for 15 minutes.

[0036] In the muffle furnace, the temperature was further raised to 920° C. for calcination, and the calcination time was 120 minutes to obtain the target product.

[0037] Morphology analysis by SEM shows that the surface of the obtained material is flat and smooth, and the particle size distribution is about 26 μm; under laser excitation, the average lifetime of fluorescence is about 175 μs.

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Abstract

The invention discloses a fluorescent material and a preparation method thereof, and an anti-counterfeit package film. The fluorescent material comprises a mica base material and a calcium titanate layer covering the surface of the mica base material. The preparation method of the fluorescent material comprises the following steps: (1) covering the surface of mica with titanium dioxide particles to prepare a mica titanium material; (2) mixing the mica titanium, calcium nitrate and praseodymium nitrate under the ultrasonic action; (3) calcining the mixture at a calcining temperature of 890 to 920 DEG C for 120 to 140 min, so as to obtain the fluorescent material. Through the adoption of an ultrasonic dispersing method, a precursor can be enabled to achieve a uniform dispersing effect withinrelatively short time, and the fluorescent performance of the material is improved.

Description

technical field [0001] The application belongs to the technical field of fluorescent anti-counterfeiting, and in particular relates to a fluorescent material, a preparation method thereof, and an anti-counterfeiting packaging film. Background technique [0002] Anti-counterfeiting printing ink is an important part of anti-counterfeiting technology. Anti-counterfeiting ink refers to ink with anti-counterfeiting function. Special printing ink processed by special process. [0003] Fluorescent materials in traditional inks usually require higher calcination temperature and longer calcination time, resulting in uneven mixing of raw materials, high hardness and coarse particles of the product. Contents of the invention [0004] The object of the present invention is to provide a fluorescent material, its preparation method, and an anti-counterfeit packaging film, so as to overcome the deficiencies in the prior art. [0005] To achieve the above object, the present invention p...

Claims

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Application Information

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IPC IPC(8): C09K11/67C09K11/02B65D65/42B32B9/00B32B9/04
CPCB32B9/00B32B9/04B65D65/42C09K11/02C09K11/7706
Inventor 陆磊
Owner ZHANGJIAGANG WUHU NEW MATERIAL TECH DEV
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