A kind of dual image storage material, its preparation method and application

A technology for storing materials and dual images, applied in the field of photopolymer materials, can solve the problems such as the reduction of fluorescence brightness, achieve the effect of high contrast and improve anti-counterfeiting ability

Active Publication Date: 2020-09-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most organic fluorescent materials have aggregation-induced fluorescence quenching effect (ACQ), that is, they show a significant decrease in fluorescence brightness in the solid state.
At present, there is a lack of effective anti-counterfeit image storage materials for holographic images and fluorescent images.

Method used

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  • A kind of dual image storage material, its preparation method and application
  • A kind of dual image storage material, its preparation method and application
  • A kind of dual image storage material, its preparation method and application

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preparation example Construction

[0040] The preparation method of the dual image storage material provided by the present invention comprises the following steps:

[0041] (1) Evenly mix 1-50 parts by weight of organic fluorescent material, 7-50 parts by weight of liquid crystal, 0.2-10 parts by weight of photoinitiator and 33-67 parts by weight of photopolymerizable monomer to obtain a double image storage material Precursor;

[0042] Wherein the specific mass fraction of monofunctionality monomer and polyfunctionality monomer then decides according to the molecular weight of above-mentioned monomer and the quantity of the carbon-carbon double bond that compound contains; Its optimum mass fraction is to make monofunctionality monomer and Multifunctional monomers have approximately the same number of carbon-carbon double bonds.

[0043] And the photoinitiator is a photoinitiator suitable for the free radical polymerization reaction excited by the coherent laser in step (2), for example, 3,3'-carbonylbis(7-di...

Embodiment 1

[0059] The dual image storage material provided by the present invention can present a holographic pattern visible to the naked eye under sunlight and a fluorescent pattern under ultraviolet light at the same spatial position of the material; the holographic pattern and the fluorescent pattern can be the same or can be Different; the holographic pattern can be a two-dimensional image or a three-dimensional image, but all of them can be observed with naked eyes under sunlight.

[0060] The double image storage material consists of 3wt% organic fluorescent material 1,2,3,4,5-pentaphenyl-1H-pyrrole (R group is n-hexyl), 48wt% liquid crystal 4-cyano-4'- Pentylbiphenyl (5CB), 0.4% photoinitiator and 49wt% photopolymerizable monomer were obtained by selective photoreaction.

[0061] The photoinitiator is a mixture of visible photoinitiator 3,3'-carbonylbis(7-diethylaminocoumarin) and N-phenylglycine. The photopolymerizable monomer is a mixture of monofunctional monomer β-hydroxyeth...

Embodiment 2

[0066] The dual image storage material provided by the present invention can present a holographic pattern visible to the naked eye under sunlight and a fluorescent pattern under ultraviolet light at the same spatial position of the material; the holographic pattern and the fluorescent pattern can be the same or can be Different; the holographic pattern can be a two-dimensional image or a three-dimensional image, but all of them can be observed with naked eyes under sunlight.

[0067] The double image storage material is composed of 5wt% organic fluorescent material HPS (R group is n-pentyl), 46wt% liquid crystal 4-n-octyloxy-4'-cyanobiphenyl (8OCB), 0.6% photoinitiated agent and 49 wt% of photopolymerizable monomers were obtained by selective photoreaction.

[0068] Wherein the photoinitiator is ultraviolet photoinitiator bis(2,6-dimethoxybenzoyl)-2,4,4-trimethylpentylphosphine oxide and 2 hydroxy-2-methyl-1-phenyl A mixture of acetone. The photopolymerizable monomer is a m...

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Abstract

The present invention belongs to the technical field of photopolymerizable materials, and more specifically, relates to a double image storage material, a preparation method therefor and the use thereof. The double image storage material is obtained by a selective photoreaction of 1-50 parts by weight of an organic fluorescent material, 7-50 parts by weight of a liquid crystal, 0.2-10 parts by weight of a photoinitiator and 33-67 parts by weight of a photopolymerizable monomer. The obtained double image storage material may not only present a high brightness holographic pattern in daylight, but may also present a fluorescent pattern excited by an ultraviolet light at the same space position. The presented holographic pattern and fluorescent pattern may be the same, and may also be different. The obtained double image storage material can be used in fields such as optical anti-counterfeiting, optical information storage, and displays.

Description

technical field [0001] The invention belongs to the technical field of photopolymerization materials, and more specifically relates to a dual image storage material, its preparation method and application. Background technique [0002] Image storage is widely used in optical anti-counterfeiting, optical information storage, display and other fields. Holographic technology is an effective means of image storage. The basic principle of holographic technology is that two coherent laser beams in space interfere to form a grating, and the amplitude and phase information of the coherent laser are simultaneously recorded to realize three-dimensional (3D) information storage. Holography can also record two-dimensional (2D) images. Holographic technology is not only widely used in the fields of data storage, distributed feedback lasers and sensors, but also because the recorded images have good visual effects, remarkable public recognition ability and difficult imitation process, e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/52C09K11/06C09K11/02C08F220/06C08F220/10C08F2/48
CPCC08F2/48C08F220/06C09K11/025C09K11/06C09K19/52C09K2211/1007C09K2211/1011C09K2211/1029C09K2211/1096C08F220/10B41M3/06C08L33/24C09K11/02G03H1/18
Inventor 彭海炎赵晔解孝林周兴平赵骁宇
Owner HUAZHONG UNIV OF SCI & TECH
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