Fluorescent anti-fake ink for business administration and preparation method thereof

A technology for anti-counterfeiting inks and uses, applied in inks, chemical instruments and methods, applications, etc., can solve the problems of prolonging the shelf life of anti-counterfeiting inks, low fluorescence intensity, and easy aggregation of carbon quantum dots, and achieve improved fluorescence intensity and water solubility, The effect of high fluorescence intensity

Active Publication Date: 2019-01-11
ZIBO VOCATIONAL INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of carbon quantum dots in the prior art that are easy to agglomerate and have low fluorescence intensity, and provide a novel hybrid carbon quantum dot as a fluorescent agent for anti-counterfeiting inks; the present invention uses citric acid as a carbon source and uses 1, 1,1,3,3,3-hexa(dimethylamino)diphosphazene tetrafluoroborate is used as a dopant to prepare hybrid carbon quantum dots with high fluorescence intensity, which can be used to prepare anti-counterfeiting inks. Crack down on counterfeit and shoddy products; in addition, the present invention uses thiosemicarbazide as a fluorescent stabilizer, prolonging the shelf life of anti-counterfeiting inks and providing market competitiveness

Method used

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  • Fluorescent anti-fake ink for business administration and preparation method thereof
  • Fluorescent anti-fake ink for business administration and preparation method thereof
  • Fluorescent anti-fake ink for business administration and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0035] 1. Preparation of hybrid carbon quantum dots, comprising the following steps:

[0036] 1) Add 1.0g of citric acid and different weights of 1,1,1,3,3,3-hexa(dimethylamino)diphosphazene tetrafluoroborate in 500ml deionized water and stir to disperse evenly, then add sodium hydroxide Adjust the pH of the system to 10-11 to obtain a hybrid carbon quantum dot precursor solution;

[0037] 2) Transfer the hybrid carbon quantum dot precursor solution to a stainless steel autoclave, and react at 230-240°C for 5-9h;

[0038] 3) After the reaction, transfer the reaction solution to the concentration kettle, concentrate the deionized water to dryness under reduced pressure at 60-70°C, add 150ml of methanol and stir evenly, then ultrasonicate at 40-50°C for 12-24h. Add 300ml of purified water to remove methanol by rectification to obtain an aqueous solution of hybrid carbon quantum dot crude product;

[0039] 4) centrifuging the aqueous solution of the hybrid carbon quantum dot cr...

Embodiment 2

[0044] 1) Add 1.0g of citric acid and 1.2g of citric acid and 1.2g of 1,1,1,3,3,3-hexa(dimethylamino)diphosphazene tetrafluoroborate into 500ml of deionized water and stir to disperse evenly, then add sodium hydroxide to adjust System pH to 10-11 to obtain hybrid carbon quantum dot precursor solution;

[0045] 2) Transfer the hybrid carbon quantum dot precursor solution to a stainless steel autoclave, and react at 230-240°C for 8 hours;

[0046] 3) After the reaction, transfer the reaction liquid to the concentration kettle, concentrate the deionized water to dryness under reduced pressure at 60-70°C, add 150ml of methanol and stir evenly, then ultrasonicate at 40-50°C for 24h, and add 300ml after the ultrasonication is completed Purified water is rectified to remove methanol to obtain a crude aqueous solution of hybrid carbon quantum dots;

[0047] 4) centrifuging the aqueous solution of the hybrid carbon quantum dot crude product with a polyethersulfone filter membrane with...

Embodiment 3

[0056] Prepare anti-counterfeiting ink with the hybrid carbon quantum dot prepared in Example 2 as fluorescent agent, the method is as follows:

[0057] Add 7 parts by weight of propylene glycol and 100 parts by weight of purified water into the reaction kettle, raise the temperature to 60-70°C, and add 35 parts by weight of water-based alkyd resin in batches; after the water-based alkyd resin is completely dissolved, cool down to 30-40°C and add 18 parts by weight of water-based acrylic epoxy emulsion, 3 parts by weight of hybrid carbon quantum dots, 4 parts by weight of triethanolamine and 3 parts by weight of SN-5040 sodium acrylic acid as a dispersant were stirred evenly and then cooled to room temperature to obtain an anti-counterfeiting ink.

[0058] The anti-counterfeiting ink prepared by the invention is water-soluble ink, green and environment-friendly, and it is coated on non-fluorescent whitening paper and placed under 365nm to observe blue fluorescence, so it can be...

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Abstract

The invention belongs to the technical field of anti-fake inks and specifically relates to a fluorescent anti-fake ink for business administration and a preparation method thereof. According to the invention, a hybrid carbon quantum dot with high fluorescence strength is prepared by taking citric acid as a carbon source and 1,1,1,3,3,3-hexa (dimethyl amino) diphosphazene tetrafluoroborate as a doping agent; the hybrid carbon quantum dot can be used for preparing the anti-fake ink; the anti-fake ink can be utilized by the business administration department to crack down counterfeit and shoddy products; in addition, thiosemicarbazide is taken as a fluorescence stabilizer in the invention, so that the shelf life of the anti-fake ink is prolonged and the market competitiveness is supplied.

Description

technical field [0001] The invention belongs to the technical field of anti-counterfeiting inks, and in particular relates to a fluorescent anti-counterfeiting ink for industrial and commercial management and a preparation method thereof. Background technique [0002] With the development of the socialist market economy, great changes have taken place in my country's social and economic life. However, due to the imperfection of the social legal system and the irregularity of the market, a unique counterfeit and shoddy market has formed in China, which seriously endangers the rights and interests of consumers and consumers. Legitimate interests of regular manufacturers. Seriously disrupted the social and economic order, became a turbid current hindering the healthy development of my country's economy, and affected the establishment of my country's socialist market economic system. Fake and shoddy products not only damage the rights and interests of consumers, but also greatly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/50C09K11/65
CPCC09D11/50C09K11/65
Inventor 徐哲
Owner ZIBO VOCATIONAL INST
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