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Multicolor fluorescent anti-counterfeiting ink, preparation method and application thereof

A fluorescent ink and anti-counterfeiting ink technology, applied in ink, application, household appliances and other directions, can solve the problems of complex preparation process of anti-counterfeiting ink and low anti-counterfeiting degree, and achieve better anti-counterfeiting effect, great industrial feasibility and good concealment. Effect

Pending Publication Date: 2021-03-09
LANZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-color fluorescent anti-counterfeiting ink and its preparation method to solve the problems of complex preparation process and low anti-counterfeiting degree of the existing anti-counterfeiting ink

Method used

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  • Multicolor fluorescent anti-counterfeiting ink, preparation method and application thereof
  • Multicolor fluorescent anti-counterfeiting ink, preparation method and application thereof
  • Multicolor fluorescent anti-counterfeiting ink, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]Step 1: Preparation of carbon quantum dots

[0040]3 g of citric acid and 3 g of urea were added to the 100 ml beaker, followed by adding 10 ml of high purity water to obtain a transparent solution, adding a beaker into a 750W microwave to adjust to medium and high grade heating 5 min, and the reaction ends to obtain a carbonized black solid material, slightly cold The oven was added to 60 ° C for 1 h, whereby the unreacted small molecule was removed, and then the addition of 15 ml of high pure water slowly stirred and dissolved the black solid substance, put the dissolved solid to the high speed centrifuge (15000R / min) Centrifuge for 20 minutes Filter having a pore diameter of 0.45 μm filtrates the supernatant and lyophilizes the brown-colored carbon quantum dots.

[0041]Step 2: Preparation of Oil Oil

[0042]Preparation of Oil Oil Select the following weight-specific components: polymer resin 36g, n-butanol 36g, ethanol 48g, auxiliary 1.2 g, the resin used is a polyamide resin, th...

Embodiment 2

[0049]Step 1: Preparation of carbon quantum dots

[0050]4 g of citric acid and 2 g of urea were added to 100 ml of beaker, and then 15 ml of high purity water was stirred and dissolved. After obtaining a clear solution, the beaker was added to the 750W microwave to adjust to the mid-range heating 7min, and the reaction was obtained to obtain a carbonized black solid material, and transferred to an oven The medium was transferred to 65 ° C for 1 h, whereby the unreacted small molecule was removed, and then the addition of 10 ml of high purity water slowly stirred and dissolved the black solid substance, and put the dissolved solid (14000 r / min) centrifuge after 30min after centrifugation for 30 min The supernatant was filtered, and the brown-colored carbon quantum dot was filtered.

[0051]Step 2: Preparation of Oil Oil

[0052]Preparation of Oil Oil Select the following weight-specific components: polymer resin 30g, n-butanol 42 g, ethanol 48 g, auxiliary 1.6 g, the resin used is a polyam...

Embodiment 3

[0059]Step 1: Preparation of carbon quantum dots

[0060]2 g of citric acid and 2 g of urea were added to a 100 ml beaker, followed by adding 8 ml of high purity water to obtain a transparent solution, adding a beaker into a 750W microwave oven to medium and high grade heating 7min, and the reaction ends to obtain a carbonized black solid substance, slightly cold The oven was added to 60 ° C for 2 h, and the object was to remove unreacted small molecules, and then removed 10 ml of high purity water slowly stirred and dissolved the black solid substance, put the dissolved solid (13000 r / min) centrifuge for 40min Filter having a pore diameter of 0.45 μm filtrates the supernatant and lyophilizes the brown-colored carbon quantum dots.

[0061]Step 2: Preparation of Oil Oil

[0062]Preparation of Oil Oil Select the following weight-specific components: polymer resin 36g, n-butanol 30g, ethanol 60g, auxiliary 1g, the resin used is a ketone resin, the auxiliary agent is a defoamer, the usage agen...

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Abstract

The invention discloses multicolor fluorescent anti-counterfeiting ink, a preparation method and application thereof. The multicolor fluorescent anti-counterfeiting ink comprises carbon quantum dots,a rare earth metal salt and gloss oil, wherein the gloss oil comprises an organic solvent, polymer resin and an auxiliary agent. The fluorescent anti-counterfeiting ink disclosed by the invention hasdifferent fluorescent colors under different excitation wavelengths, is high in anti-counterfeiting level, and can be applied to anti-counterfeiting applications of various commodities, such as papermoney anti-counterfeiting, security anti-counterfeiting, train ticket anti-counterfeiting, information encryption and the like.

Description

Technical field[0001]The present invention belongs to the field of fluorescent anti-counterfeiting ink, and more particularly to a multi-color fluorescent anti-counterfeiting ink and a preparation method thereof.Background technique[0002]With the development of social economy, in order to pursue the maximum economic interests, many bad businessmen have begun to fake well-known brands, and a large number of counterfeit products have frequently developed in the life of ordinary public, not only affecting people's health and serious damages. The reputation and product recognition of brand-name merchants, in order to protect consumers and merchants themselves, more and more well-known merchants use a variety of anti-counterfeiting label printing in the product, so more and more anti-counterfeiting products Shun it. Anti-counterfeiting label is not only a means of merchants to protect their products, but also to facilitate consumers to identify authenticity, so security labels not only n...

Claims

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Application Information

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IPC IPC(8): C09D11/50C09D11/102C09D11/103C09D11/107C09D11/03G09F3/00B42D25/378
CPCC09D11/50C09D11/102C09D11/103C09D11/107C09D11/03G09F3/0294B42D25/378
Inventor 唐瑜覃月敏
Owner LANZHOU UNIVERSITY
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