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A flexible rare earth transparent luminescent film and its preparation method

A luminescent film and rare earth luminescent technology, which is applied in the preparation of efficient and flexible rare earth transparent luminescent film, and in the field of transparent luminescent film, can solve the problems of high synthesis cost, long reaction cycle, cumbersome synthesis and purification steps, etc., and achieve simple and mechanical High strength, the effect of increasing the dissolved concentration

Active Publication Date: 2016-06-08
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method often involves tedious synthesis and purification steps
This leads to long reaction cycle and high synthesis cost

Method used

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  • A flexible rare earth transparent luminescent film and its preparation method
  • A flexible rare earth transparent luminescent film and its preparation method
  • A flexible rare earth transparent luminescent film and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Take 1g of laponite LAPONITERD in a 100ml flask, add 15ml of double distilled water to dissolve, sonicate, and stir with a glass rod until it is in a transparent gel state (about 30min), then add 10ml of 0.1mol / LEuCl to it 3 ·6H 2 O ethanol solution, refluxed in an oil bath at 80°C for 24h. After centrifugation and drying, the ion-exchanged water-soluble gel-state nanoclay is obtained, which is designated as LA-Eu.

[0043] (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 condensate obtained in the previous step LA-Eu in the gel state was added to the flask, ultrasonicated, and then 6ml of absolute ethanol was added, reacted for 5 hours, centrifuged, and dried to obtain a water-soluble gel-state nanoclay containing luminescent rare earth organic ligands, which was designated as LA-EuTTA.

[0044] (3) Take the sila...

Embodiment 2

[0048] Steps (1) and (2) are the same as in Example 1, but the silanized ionic liquid II in steps (3) and (4) is changed to N-acetonyl pyridinium chloride, and other conditions remain unchanged, and finally a transparent luminescent film LA is obtained. -EuTTA-VIII-PVA. The film also has light, thin, uniform and transparent properties as in Example 1, and has good tensile properties. Image 6 It is the mechanical performance test of the flexible transparent light-emitting film in Example 1. Among them, a is the force and displacement diagram of the tensile test, and it can be seen from the figure that the tensile displacement can exceed 44mm. Where b is the stress-strain diagram of the tensile test, from which it can be seen that the elongation at break can reach 264.56%, and the maximum stress can reach 10MPa. Figure 7 It is the excitation spectrum figure of the flexible transparent luminescent film in embodiment 2, Figure 8 The emission spectrum of the flexible transpar...

Embodiment 3

[0050] Steps (1) and (2) are the same as in Example 1, but the silanized ionic liquid II in steps (3) and (4) is changed to a hydroxyl ionic liquid, and other conditions remain unchanged, and finally a transparent luminescent film LA-EuTTA-VII is obtained -PVA. The film is also light, thin, uniform, and transparent as in Example 1, and has good tensile properties. Under an ultraviolet lamp, the luminescent material also exhibits an obvious bright red color. The maximum emission wavelength of the film is located at 612nm.

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Abstract

The invention relates to a flexible rare earth transparent luminescent film and a preparation method thereof. The composition of the film includes a rare earth luminescent material and polyvinyl alcohol (PVA); wherein, the mass ratio is rare earth luminescent material: PVA=1:1~4; Among the rare earth luminescent materials, including LAPONITE RD nanoclay containing luminescent rare earth organic complex, oxygen-containing ionic liquid and water, wherein, the mass ratio is LAPONITE RD nanoclay containing luminescent rare earth organic complex: oxygen-containing ionic liquid= 1:1-3, the mass of water is 80%-85% of the rare earth luminescent material; the average particle size of the nanoclay is 30nm; the mass percentage of rare earth ions in the nanoclay is 6%-7.5%. The high-efficiency flexible rare-earth transparent luminescent film prepared by the invention is a new type of high-efficiency luminescent film that can be peeled off, is light and thin, has a large area, is flexible, has excellent thermal stability and light stability, and has high mechanical strength.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, and relates to a transparent luminescent film, in particular to a preparation method of an efficient and flexible rare earth transparent luminescent film based on polymer materials and artificially synthesized nanoclay. technical background [0002] The complexes formed by the combination of rare earth elements and suitable organic ligands have the advantages of strong light-absorbing ability, rich fluorescent colors and high color purity. decomposition, leading to certain limitations in its application. Studies have shown that combining rare earth organic complexes with zeolite, clay and other substrates can effectively improve their light stability, thermal stability and mechanical stability. In addition, rare earth complexes often have poor water solubility, and their luminescence efficiency is often very low in aqueous solution due to the fluorescence quenching effect of water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08K5/45C08J5/18
Inventor 李焕荣杨大清章昱昭赵灿李珍光
Owner HEBEI UNIV OF TECH
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