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A kind of preparation method of anti-counterfeiting label with micro-nano structure

A technology of anti-counterfeiting labels and micro-nano structures, which is applied in the direction of record carriers, identification devices, and instruments used by machines, can solve the problems of unfavorable long-term storage, unfavorable, and inconvenient use, and achieve rich raw materials, novel structures, and safety factors. high effect

Active Publication Date: 2022-02-22
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the coated nanoparticles can be stored in the solution for a certain period of time, it is not conducive to long-term storage, and it is inconvenient to use, which is not conducive to being used as a physical label

Method used

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  • A kind of preparation method of anti-counterfeiting label with micro-nano structure
  • A kind of preparation method of anti-counterfeiting label with micro-nano structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of 12 wt% PMMA and P4VP spinning fluid, the mass ratio of the two polymers is 1: 2, the solvent is acetone and DMF mixed solvent, the volume ratio is 2: 1. The parameters of the static spinning machine are as follows: 25 kV positive pressure, negative pressure -5 kV, pumping speed 0.20mm / min, and receive distance 20cm.

[0024] (2) Au NPS for the preparation of about 40 nm was prepared, and 0.01 mm 4-MBA was modified on the surface of the Au NPS, and silica was coated in the surface of the Au NPS by a sol gel method, wherein the volume of water and isopropyl alcohol. The ratio is 1: 5, gets a particle size of about 60 nm au @ Sio 2 NPS, the coating thickness is about 10 nm.

[0025] (3) Au @ Sio concentrations of 200 μmol / L 2 NPS was dispersed in a mixed solution of pH = 2 and ammonium acetate, 2 cm × 2 cm electrostatic spinning fibers were immersed in the above solution, the process remained in a stationary state for 10 min, so that electrostatic spinni...

Embodiment 2

[0029] (1) The 20 wt% PMMA and P4VP spinning fluids are formulated. The mass ratio of the two polymers is 2: 1, the solvent is acetone and DMF mixed solvent, the volume ratio is 1: 3. The parameters of the electrostatic spinning machine are as follows: positive pressure 18kV, negative pressure -1kv, pumping speed 0.45mm / min, and receive distance 15cm.

[0030] (2) Preparation of Au NPS for a particle size of about 60 nm, modified 8.9 mM Mbia in the surface of the Au NPS, coated with silica in the surface of the Au NPS by a sol gel method, wherein the volume ratio of water and isopropanol is 2.5: 1, get the particle size of about 100 nm Au @ Sio 2 NPS, the coating thickness is about 20 nm.

[0031] (3) Au @ Sio in 200 pmol / L 2NPS was dispersed in a mixed solution of pH = 4 and ammonium acetate, and 2 cm × 2 cm electrostatic spinning fibers were immersed in the above solution, the process remained in the oscillating state for 10 min, so that electrospinning fibers and Au @ SiO 2...

Embodiment 3

[0035] (1) Handling 38 wt% of PMMA and P4VP spinning fluid, the mass ratio of the two polymers is 1: 2, the solvent is acetone and DMF mixed solvent, the volume ratio is 4: 1. The parameters of the static spinning machine are as follows: positive pressure 15kV, negative pressure -1kv, pumping speed 0.25mm / min, and receive distance 30cm.

[0036] (2) Au NPS having a particle diameter of about 80 nm was prepared, and 5 mm 4-MBA and 5 mM MbIa (volume ratio 1:10) were prepared to be modified in the surface of the Au NPS, and silica was coated in Au by a sol gel method. The surface of the NPS, wherein the volume ratio of water and isopropyl alcohol is 5: 1, and the particle size is approximately 200 nm Au @ SiO 2 NPS, the coated thickness is about 60 nm.

[0037] (3) Put the concentration of 1 pmol / Lau@sio 2 NPS was dispersed in a mixed solution of pH = 9 and ammonium acetate, 2 cm × 2 cm electrospinning fibers were immersed in the above solution, the process remained in the vortex s...

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Abstract

The invention relates to a method for preparing an anti-counterfeit label with a micro-nano structure, which is obtained by assembling electrospun fibers and nanoparticles with a core-shell structure. Nanoparticles contain specific Raman molecules with specific Raman fingerprint peaks, the intensity and position of the fingerprint peaks can be converted into specific barcodes. The material can be stably fixed on the glass surface, and the Raman signal remains good after repeated washing, which can be used as an anti-counterfeiting label for glass. The label has a special "topography", that is, micron-scale electrospun fibers and nano-scale core-shell structure, through-hole structure, unique barcode and stable performance.

Description

Technical field [0001] The present invention relates to a method of preparing a micro-span structure anti-counterfeiting label, belonging to an optical material and its anti-counterfeiting field, particularly suitable for true and false identification of a glass substrate. Background technique [0002] Car glass is an indispensable part of the car structure. High-quality glass is able to resist the stones of the stones, which is the first barrier to ensure life safety. Counterfeit and shoddy glass not only affects the degree of visual and fatigue, but also makes a serious threat to the lives of the occupant. If the counterfeit and shoddy glass gives a huge profiteering, it will make the consumer's personal, property rights, and seriously restrict the economic development and the image of brand merchants. In order to identify counterfeit and shoddy products, maintain the market order, and the anti-counterfeiting techniques came into being. According to the anti-counterfeit technic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K19/06G09F3/02
Inventor 李董艳顾越陈虹宇刘优林
Owner NANJING TECH UNIV
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