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Mie resonance anti-counterfeiting product based on hollow structure purple TiO2 and anti-counterfeiting method of Mie resonance anti-counterfeiting product

A hollow structure and product technology, applied in the preparation/purification of carbon, titanium oxide/hydroxide, instruments, etc., can solve the problems that users are not easy to identify, cannot distinguish authenticity, and anti-counterfeiting labels are easy to be counterfeited, so as to meet the requirements of anti-counterfeiting. requirements, easy to distinguish, to overcome the complex preparation and small-scale effects

Active Publication Date: 2018-04-03
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing anti-counterfeiting technology still has the defects that users are not easy to identify, and the anti-counterfeiting marks are easy to be counterfeited.
Once the anti-counterfeiting method is cracked or copied, it can be used to label batches of counterfeit and inferior goods, and cannot really serve the purpose of distinguishing the authenticity from the counterfeit

Method used

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  • Mie resonance anti-counterfeiting product based on hollow structure purple TiO2 and anti-counterfeiting method of Mie resonance anti-counterfeiting product
  • Mie resonance anti-counterfeiting product based on hollow structure purple TiO2 and anti-counterfeiting method of Mie resonance anti-counterfeiting product
  • Mie resonance anti-counterfeiting product based on hollow structure purple TiO2 and anti-counterfeiting method of Mie resonance anti-counterfeiting product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of purple TiO with monodisperse hollow structure 2 The preparation method of material comprises the following steps:

[0035] Step 1, a certain amount of tetraethyl orthosilicate is mixed with absolute ethanol and deionized water and stirred evenly, the volume ratio of ethanol to tetraethyl orthosilicate is 26:1, deionized water and tetraethyl orthosilicate The volume ratio is 5:1;

[0036] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28wt%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.7:1, and centrifuge, wash and separate after stirring for 4 hours;

[0037] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0038] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hy...

Embodiment 2

[0046] A kind of purple TiO with monodisperse hollow structure 2 The preparation method of material comprises the following steps:

[0047] Step 1, mix and stir a certain amount of tetraethyl orthosilicate with absolute ethanol and deionized water, the volume ratio of ethanol to tetraethyl orthosilicate is 20:1, deionized water and tetraethyl orthosilicate The volume ratio is 4:1;

[0048] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.68:1, centrifuge and wash and separate after stirring for 4 hours;

[0049] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0050] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellu...

Embodiment 3

[0058] A kind of purple TiO with monodisperse hollow structure 2 The preparation method of material comprises the following steps:

[0059] Step 1, mix and stir a certain amount of tetraethyl orthosilicate with absolute ethanol and deionized water, the volume ratio of ethanol to tetraethyl orthosilicate is 25:1, deionized water and tetraethyl orthosilicate The volume ratio is 6:1;

[0060] Step 2, add a certain amount of concentrated ammonia water (concentration 26-28%) to step 1, the volume ratio of concentrated ammonia water to tetraethyl orthosilicate is 0.64:1, and centrifuge and wash after stirring for 4 hours;

[0061] Step 3, the SiO obtained in step 2 2 Dispersed in an appropriate amount of absolute ethanol for subsequent use, the volume ratio of the volume of absolute ethanol to tetraethyl orthosilicate described in step 1 is 23:1;

[0062] Step 4, to the SiO in step 3 2 Add a certain volume of acetonitrile and an appropriate amount of hydroxypropyl cellulose to t...

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Abstract

The invention discloses a Mie resonance anti-counterfeiting product based on hollow structure purple TiO2 and an anti-counterfeiting method of the Mie resonance anti-counterfeiting product and is applied to commodity anti-counterfeiting authentication. The anti-counterfeiting product takes a hollow structure TiO2 material as an anti-counterfeiting material, and TiO2 hollow spheres in the anti-counterfeiting material have the shell thickness of 15-25 nm and inner diameter of 170-190 nm. The hollow structure purple TiO2 material is prepared in the following steps: anti-counterfeiting pattern production; material spraying, medium conversion color change and medium restoration color recovery. The Mie resonance anti-counterfeiting product and the anti-counterfeiting method have the advantages that Mie resonance anti-counterfeiting product has unique color change and high response speed, is easy to distinguish by human eyes, cannot be copied easily and has high anti-counterfeiting level.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and the invention relates to a purple TiO with a hollow structure 2 Mie resonance anti-counterfeiting technology. Background technique [0002] As technology advances, so does the level of imitation. The emergence of a large number of counterfeit and inferior products has violated the legitimate rights and interests of consumers and businesses, and has brought great negative effects to brands. It is generally difficult for ordinary consumers to distinguish the authenticity of products, which seriously affects the experience and use of real products. In response to this situation, many businesses have adopted anti-counterfeiting technology. There are many types of anti-counterfeiting technologies, such as printing anti-counterfeiting technology, digital anti-counterfeiting technology, barcode anti-counterfeiting technology and chemical material anti-counterfeiting technology. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01B32/05G09F3/02
Inventor 姚霞喜胡秀丽恽超马智豪黄瑾王旭红余磊
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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