Preparation method of ultraviolet light induced surface self-folding pattern and application of pattern in constructing anti-counterfeiting marks

An ultraviolet light and wrinkle technology, which is applied in the field of wrinkle patterns, can solve problems that do not involve intelligent identification of patterned surface anti-counterfeiting marks, and achieve the effects of repeated use, easy availability of raw materials, and low cost

Active Publication Date: 2019-01-15
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no report in the prior art that uses the surface destabilization mechanism to form a microscopic pattern

Method used

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  • Preparation method of ultraviolet light induced surface self-folding pattern and application of pattern in constructing anti-counterfeiting marks
  • Preparation method of ultraviolet light induced surface self-folding pattern and application of pattern in constructing anti-counterfeiting marks
  • Preparation method of ultraviolet light induced surface self-folding pattern and application of pattern in constructing anti-counterfeiting marks

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Dissolve SBS and mercaptoethanol in a solvent according to a certain ratio, add a photoinitiator, and carry out grafting reaction. In this example, the content of mercaptoethanol accounts for 30%, and the hydroxyl-grafted SBS is obtained. On this basis, a certain amount of anthracene carboxylic acid compound is added, and the anthracene group is grafted onto the hydroxyl-functionalized SBS molecular chain by esterification reaction. In this example, the mole fraction of the carboxyl group of the anthracene carboxylic acid compound relative to the hydroxyl group was 40%, and the anthracene-grafted SBS was prepared.

[0070] Anthracene-grafted SBS was dissolved in toluene, the concentration in this example was set at 25%, and after stirring evenly, it was drop-coated on a glass sheet, and dried to remove the solvent to obtain a single-layer uniform film. The film was placed under ultraviolet light for 10 minutes, and the surface formed a self-wrinkled structure. figure ...

Embodiment 2

[0072]Polybutadiene and mercaptoethanol are dissolved in a solvent according to a certain ratio, and a photoinitiator is added to carry out a click reaction. In this example, the content of mercaptoethanol accounts for 40% to obtain hydroxyl-grafted polybutadiene. On this basis, a certain amount of anthracene carboxylic acid compound is added, and the anthracene group is grafted onto the hydroxyl functionalized polybutadiene molecular chain by esterification reaction. In this example, the mole fraction of the carboxyl group of the anthracene carboxylic acid compound relative to the hydroxyl group was 30%, and anthracene-grafted polybutadiene was prepared.

[0073] Anthracene-grafted polybutadiene was dissolved in chloroform, the concentration in this example was set at 20%, after stirring evenly, it was dropped on a glass sheet, and the solvent was dried to obtain a single-layer uniform film. The film was placed under ultraviolet light with a wavelength of 365nm for 5 minutes,...

Embodiment 3

[0075] Polybutadiene (polybutadiene used in this example is commercially available BR9000) and photoinitiator are dissolved in xylene, and the concentration in this example is set as 15%, after stirring evenly, drop on the glass sheet, dry and remove solvent , to obtain a monolayer homogeneous film. Place the film under ultraviolet light with a wavelength of 254nm for 20 minutes, and the surface forms a self-wrinkled structure. Figure 6 It is the wrinkle pattern formed after the polybutadiene system is exposed to ultraviolet light.

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PUM

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Abstract

The invention relates to a preparation method of an ultraviolet light induced surface self-folding pattern and an application of the pattern in constructing anti-counterfeiting marks. Specifically, the method includes the steps: (a) coating a solution of a polymer system on a support substrate to form a polymer film; and (b) irradiating the polymer film with ultraviolet light with a wavelength of300 nm or longer to form the folding pattern with identifiable size in a range of 0.1-1000 [mu]m, wherein the polymer system comprises a polymer having groups capable of crosslinking under an ultraviolet illumination condition. In some embodiments, the polymer system comprises a polymer having a photodimeric group or is composed of a polymer having a photodimeric group. In other embodiments, the polymer system comprises a polymer having a photopolymeric group and a photoinitiator or is composed of a polymer having the photopolymeric group and a photoinitiator.

Description

technical field [0001] The invention relates to a preparation method for a surface self-wrinkling pattern and a wrinkling pattern formed therefrom. Specifically, the present invention relates to a method for preparing surface self-wrinkling patterns induced by ultraviolet light. The present invention also relates to the application of the above-formed wrinkle pattern in constructing anti-counterfeiting marks and performing identity verification. Background technique [0002] Patterned surfaces not only widely exist in nature, but also are widely used in many fields of life and industry. Over the past decade, patterned surfaces involving polymer films have been used in a wide variety of applications ranging from the fabrication of microchips and microelectromechanical (MEM) devices to the preparation of substrates for cell growth and adhesion. Thus, generating such patterned polymer surfaces has received increasing attention. [0003] At present, the common methods of surf...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08J5/18G03F7/00
CPCC08J5/18C08J2353/02G03F7/00
Inventor 姜学松白静
Owner SHANGHAI JIAO TONG UNIV
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