Preparation method and application of anti-counterfeit label based on temperature-induced phase change hydrogel

An anti-counterfeiting label and hydrogel technology, applied in the field of anti-counterfeiting label design, can solve the problems of low security of the anti-counterfeiting label, weak pattern coding ability, etc., and achieve high anti-counterfeiting security, simple synthesis method, and obvious change in light transmittance. Effect

Active Publication Date: 2022-01-28
SUN YAT SEN UNIV
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]Based on this, the present invention provides a preparation method and application of an anti-counterfeit label based on temperature-induced phase change hydrogel to solve the problem of the security of existing anti-counterfeit labels Not high, the technical problem of pattern coding ability is not strong

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of anti-counterfeit label based on temperature-induced phase change hydrogel
  • Preparation method and application of anti-counterfeit label based on temperature-induced phase change hydrogel
  • Preparation method and application of anti-counterfeit label based on temperature-induced phase change hydrogel

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] According to the above ideas, the present invention provides a method for preparing an anti-counterfeiting label based on a thermo-induced phase change hydrogel, such as figure 1 Shown, this preparation method comprises the following steps:

[0032] Step S1, mixing two monomers, N,N-dimethyl(acrylamidopropyl)ammonium butanesulfonate and acrylamide, or isopropylacrylamide and acrylamide to obtain a mixed monomer.

[0033] In the above step S1, N,N-dimethyl(acrylamidopropyl)ammonium butanesulfonate is obtained through the following steps, specifically: 1,4-butane sultone and N-[3-(dimethylamino) Propyl]acrylamide was respectively dissolved in acetonitrile solvent, the two were slowly mixed together, stirred at room temperature 25°C for 1 day, a white precipitate was obtained, and the corresponding product could be obtained after cooling, washing, filtering, and vacuum drying, wherein, 1, The molar ratio of 4-butane sultone and N-[3-(dimethylamino)propyl]acrylamide is 1:1...

Embodiment 1

[0049] The process of preparing an anti-counterfeiting label from a temperature-induced phase change hydrogel based on the highest critical solution temperature is as follows:

[0050] Add 300mg N,N-dimethyl(acrylamidopropyl)ammonium butanesulfonate (NDAABS), 53.07mg acrylamide (AM), 10.36mg N,N'-methylenebisacrylamide (BIS) and 3.83mg persulfuric acid Ammonium (APS) was added to 3.53 mL of water and fully dissolved with magnetic stirring at 25°C;

[0051] Then let it stand at 25°C for more than 30 minutes, then add 2.52uL of N,N,N',N'-tetramethylethylenediamine (TEMED) to the mixture while stirring, and then inject the mixed solution with a syringe Quickly transfer to a transparent acrylic substrate, and stand at 25°C for 12 hours to solidify into a gel. The obtained product can be found in figure 2 As shown in (a), the anti-counterfeiting label is obtained.

Embodiment 2

[0053] refer to figure 2 As shown, the process of preparing an anti-counterfeiting label from a temperature-induced phase change hydrogel based on the lowest critical solution temperature is as follows:

[0054] Add 300 mg of isopropylacrylamide (NIPAAm), 37.69 mg of acrylamide (AM), 4.9 mg of N,N'-methylenebisacrylamide (BIS), and 7.26 mg of ammonium persulfate (APS) into 3.38 mL of water for 25 Magnetic stirring at ℃ to fully dissolve;

[0055] Then freeze and stand at 4°C for more than 30 minutes, then add 3.98uL of N,N,N',N'-tetramethylethylenediamine (TEMED) to the mixture while stirring, and then inject the mixed solution with a syringe Quickly transfer to a transparent substrate made of transparent acrylic, and stand at 4°C for 12 hours to solidify into a gel. The obtained product can be found in figure 2 As shown in (b), the anti-counterfeiting label is obtained.

[0056] The method of this example 1 and 2 is changed by changing the acrylamide (AM) and isopropylac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a preparation method and application of an anti-counterfeit label based on temperature-induced phase change hydrogel, and the method comprises the following steps: mixing two monomers of N, N-dimethyl (acrylamide propyl) ammonium butanesulfonate and acrylamide, or mixing isopropyl acrylamide and acrylamide to obtain a mixed monomer; uniformly dissolving a mixed monomer, a cross-linking agent and an initiator in water, standing in a preset temperature environment for more than 30 min, then adding a reducing agent, and uniformly stirring to obtain a mixed solution, the cross-linking agent being N, N '-methylene bisacrylamide, the initiator being ammonium persulfate, and the reducing agent being N, N, N', N'-tetramethylethylenediamine; and transferring the obtained mixed solution into a transparent substrate with a groove pattern, and carrying out polymerization reaction in a pattern area to coagulate into gel, so as to obtain the anti-counterfeit label of the temperature-induced phase change hydrogel based on the lowest critical solution temperature or the highest critical solution temperature. The anti-counterfeit label prepared by the invention is relatively high in identification degree, relatively high in anti-counterfeit safety and relatively strong in coding capability.

Description

technical field [0001] The invention relates to the field of anti-counterfeit label design, in particular to a preparation method and application of an anti-counterfeit label based on a temperature-induced phase change hydrogel. Background technique [0002] Information leaks and counterfeit products seriously endanger the safety of human property, health and social stability. There is no doubt that anti-counterfeiting labels are the key technology to curb the rampant counterfeiting. Generally, researchers are committed to obtaining perfect anti-counterfeiting technology should have the following points: (1) cannot be cloned or extremely difficult to copy; (2) information is easy to read; (3) information storage capacity is large; (4) high stability; (6) Low cost. In recent years, scientists have proposed various anti-counterfeiting strategies, including watermarks, graphic codes, structural colors, fluorescence, holographic imaging, molecular tags and other technologies. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02C08F220/56C08F220/58C08F222/38C08F220/54C08J3/075C08L33/26
CPCG09F3/0294C08F220/56C08J3/075C08J2333/26C08F220/585C08F222/385C08F220/54
Inventor 刘卫娄东阳郑治坤陈旭东
Owner SUN YAT SEN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap