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Multi-allochroic composite fluorescent film and its preparing process and application

A color-changing fluorescent, composite film technology, applied in luminescent materials, chemical instruments and methods, coatings, etc., can solve the problems of single anti-counterfeiting technology and easy to be imitated, and achieve the effect of high luminous brightness, low cost and bright colors

Inactive Publication Date: 2003-02-19
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these anti-counterfeiting technologies are limited to a single color under the irradiation of a single wavelength of light, so there is a defect that the anti-counterfeiting technology is single and easy to be imitated.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In order to illustrate the present invention more clearly, the following examples are cited, but this does not limit the scope of the present invention in any way. Embodiment 1 prepares three-color transparent film with manual coating method:

[0039] Weigh 40 mg each of the synthesized europium-salicylic acid-phenanthroline phosphor and terbium-quinolone phosphor, and prepare solution A and solution B with 10 ml of chloroform solvent respectively. Weigh 0.3g of PVP and dissolve it in 30ml of chloroform solvent to form solution C. Solution A and solution C, solution B and solution C are mixed evenly to obtain solution D and solution E respectively. Take an appropriate amount of solution D and solution E, and apply them repeatedly and evenly on the front and back of the polyethylene terephthalate polymer transparent film. Wait for the chloroform solvent to evaporate completely.

[0040] The fluorescent composite film prepared by the above method has the following discol...

Embodiment 2

[0041] The selected terbium-quinolone complex in the present embodiment, its ligand is the quinolone compound shown in general formula (II), wherein R 1 is piperazinyl, R 2 is ethyl, R 3 for Cl. Example 2 Preparation of three-color transformation transparent film by high-speed spin coating

[0042] Prepare the solution D and solution E according to the method in Example 1. Adsorb the front side of polyethylene terephthalate polymer transparent film on the stage of high-speed glue homogenizer, drop 10 drops of D solution on the back side of the film, and rotate at 60rmp and 3000rmp for 6s and 60s respectively , to obtain a uniform film on the opposite side. Then adsorb the reverse side of the film on the stage of the high-speed glue homogenizer, drop 10 drops of E solution on the front side of the film, and rotate at 60rmp and 3000rmp for 6s and 60s, respectively, to obtain a uniform film on the front side.

[0043] The fluorescent composite film is prepared by the above m...

Embodiment 3

[0043] The fluorescent composite film is prepared by the above method, and under the irradiation of ultraviolet light with a wavelength of 200nm to 300nm, the front side shows green and the back side shows red. Under the irradiation of ultraviolet light with a wavelength of 300-400nm, the film is yellow. Example 3 Preparation of orange-red, green two-color conversion transparent film by manual coating method:

[0044] Weigh 30 mg and 10 mg of the synthesized europium-salicylic acid-phenanthroline complex and terbium-salicylic acid-phenanthroline complex respectively, mix them and use 10 ml of chloroform solvent to make solution A. Separately weigh 40 mg of terbium-quinolone complex and prepare solution B with 10 ml of chloroform solvent. Then weigh 0.3g of PVP and dissolve it in 30ml of chloroform solvent to form solution C. Mix solution A and solution C, solution B and solution C uniformly to obtain solution D and solution E respectively. Take an appropriate amount of solu...

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PUM

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Abstract

An allochoric composite fluorescent film is prepared from substrate and high-molecular film prepared from fluorescent substance and filming agent through coating the solutions of fluorescent substance and filming agent onto substrate. The said substrate is transparent in visual band and segmental transparent in ultraviolet band. The said fluorescent substance is Ln(L1)3(L2)0-1, where Ln is chosen from Sm, Eu, Tb and Dy and L1 and L2 are ligand. Its advantages are high allochroic effect, and high luminescent efficiency.

Description

Technical field: [0001] The patent of the present invention relates to an article whose surface can change color, its preparation method and application, and belongs to the field of rare earth complexes and organic polymer compounds. technical background: [0002] Some rare earth complexes have unique fluorescent properties and can be developed into luminescent materials. They have great application value in the fields of laser, photoluminescence, electroluminescence, etc., especially as anti-counterfeiting materials. In recent years, research and patent applications on rare earth fluorescent materials have gradually increased, and the use of unique fluorescent properties of rare earths in anti-counterfeiting technology has also been reported. However, these anti-counterfeiting technologies are all limited to single color rendering under the irradiation of a single wavelength of light, so there is a defect that the anti-counterfeiting technology is single and easy to be imit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/06C09K11/00
Inventor 杨军徐怡庄李勇吴瑾光杨展澜高宏成徐端夫
Owner PEKING UNIV
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