Flexible chitosan luminescent film with rare earth and method for preparing flexible chitosan luminescent film

A rare earth luminescent and luminescent thin film technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems such as being insoluble in water and conventional organic solvents, the preparation process of luminescent thin films is not environmentally friendly, and the application is limited. Fluorescence quenching, reducing the use of pharmaceuticals, and improving the effect of luminous efficiency

Inactive Publication Date: 2017-01-04
TIANJIN TEDA ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the preparation process of traditional luminescent thin films is not environmentally friendly
Chitosan can be used as a substitute for traditional synthetic polymer materials to improve the environmental protection of the film preparation process, but it is insoluble in water and conventional organic solvents, which limits its application. Therefore, it is necessary to find an effective solvent to promote its While dissolving, it does not affect the luminous performance of the film

Method used

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  • Flexible chitosan luminescent film with rare earth and method for preparing flexible chitosan luminescent film
  • Flexible chitosan luminescent film with rare earth and method for preparing flexible chitosan luminescent film
  • Flexible chitosan luminescent film with rare earth and method for preparing flexible chitosan luminescent film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of a rare earth-containing flexible chitosan luminescent film, using the following steps:

[0025] 1) Take 1g of hectorite in a 100ml flask, add 15ml of double distilled water to dissolve, sonicate it to make it fully expand, and stir it with a glass rod until it is in a transparent gel state. The stirring time is about 30min, and then add 10ml of 0.1mol / LEuCl 3 ·6H 2 O ethanol solution, stirred in an oil bath at 80°C for 24h. After centrifugation, ultrasonic washing, and finally drying in an oven at 50°C for 24 hours, the ion-exchanged water-soluble gel-state nanoclay was obtained, which was designated as LA-Eu. Among them, the rare earth ion Eu 3+ The mass percent content is 6.3%.

[0026] 2) Take 0.29g (1.308mmol) α-thienoyltrifluoroacetone (TTA) in a 100ml flask (the molar number of Ln ions is excessive relative to TTA), add 10ml of absolute ethanol to dissolve, and then dissolve the gel obtained in step 1) LA-Eu in the state was added to ...

Embodiment 2

[0030] A preparation method of a rare earth-containing flexible chitosan luminescent film, using the following steps:

[0031] 1) same as step 1) of embodiment 1;

[0032] 2) same as step 2) of embodiment 1;

[0033] 3) Dissolve 0.161g of carboxyimidazole ionic liquid V in 8.4ml of water, add 0.329g of chitosan, and sonicate until it is completely dissolved; take 0.13g of LA-EuTTA and disperse it into 8.4ml of water, mix well, sonicate for 30min, and use dripping Add it dropwise to a glass slide, put it in an oven at 30°C, and dry it slowly to obtain a light, uniform, and transparent luminescent film II. Among them, carboxyimidazole ionic liquid: chitosan = 1: 2, rare earth luminescent material: ionic liquid bond chain chitosan derivative = 1: 3.8. Add 16 mg of water-soluble gel-state rare earth luminescent material, 39 mg of chitosan, and 19 mg of carboxyimidazole ionic liquid per 1 ml of water.

[0034] The above-mentioned luminescent film II is the same as the luminescen...

Embodiment 3

[0036] A preparation method of a rare earth-containing flexible chitosan luminescent film, using the following steps:

[0037] 1) same as step 1) of embodiment 1;

[0038] 2) same as step 2) of embodiment 1;

[0039] 3) Dissolve 0.073g of carboxyimidazole ionic liquid II in 3.8ml of water, add 0.148g of chitosan, and sonicate until it is completely dissolved; take 0.045g of LA-EuTTA and disperse it into 3.8ml of water, mix well, ultrasonicate for 30min, and use drop Add it dropwise to a glass slide, put it in an oven at 30°C, and dry it slowly to obtain a light, uniform, and transparent flexible chitosan luminescent film III. Among them, carboxyimidazole ionic liquid: chitosan = 1: 2, rare earth luminescent material: ionic liquid bond chain chitosan derivative = 1: 4.9. Add 12 mg of water-soluble gel-state rare-earth luminescent material, 39 mg of chitosan, and 16 mg of carboxyimidazole ionic liquid per 1 ml of water.

[0040] The luminescent film III, like the luminescent ...

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Abstract

The invention discloses a flexible chitosan luminescent film with rare earth. The flexible chitosan luminescent film comprises rare earth luminescent materials and chitosan derivatives with ionic liquid bond chains. A mass ratio of the rare earth luminescent materials to the chitosan derivatives with the ionic liquid bond chains is equal to 1:3-4.9; the rare earth luminescent materials comprise organic ligands and nanometer clay, the nanometer clay comprises, by weight, 6%-7.5% of rare earth ions, the rare earth elements particularly include a type of or a plurality of types of Ln elements including Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm and Yb, and the organic ligands comprise TTA (alpha-thenoyl trifluoroacetone); the chitosan derivatives with the ionic liquid bond chains comprise chitosan and carboxyl imidazole ionic liquid, and a mass ratio of the carboxyl imidazole ionic liquid to the chitosan is equal to 1:2-3.9. The invention further discloses a method for preparing the flexible chitosan luminescent film with the rare earth. The flexible chitosan luminescent film and the method have the advantages that the flexible chitosan luminescent film is excellent in performance, and processes for preparing the flexible chitosan luminescent film are green and are environmentally friendly.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, and relates to a transparent luminescent film and a preparation method thereof, in particular to a flexible rare earth transparent luminescent film based on natural polymer materials and artificially synthesized nanoclay and a preparation method thereof. Background technique [0002] Rare earth complexes have excellent properties such as long fluorescence lifetime, good luminous monochromaticity, strong light absorption ability, rich emission spectrum lines, and wide luminescence coverage. They have potential applications in lighting, display, bioluminescence labeling, etc. However, their inherent defects such as poor light and thermal stability and mechanical properties, poor film-forming properties and easy agglomeration limit their practical applications. The rare earth hybrid luminescent material can be prepared by assembling the rare earth organic complex into the inorganic m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/02
CPCC09K11/06C09K11/025C09K2211/182
Inventor 马剑冯昱李静韩檬
Owner TIANJIN TEDA ENVIRONMENTAL PROTECTION
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