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A kind of flexible luminous polyimide film and its preparation method and application

A polyimide film, a flexible technology, applied in the field of material science, can solve the problem of little improvement in the photoluminescence efficiency of polyimide, and achieve a simple and diverse preparation process, low condition requirements, and high photoluminescence efficiency Effect

Active Publication Date: 2019-07-05
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the groups in the aromatic chromophores of these materials are too planar, the serious group stacking effect still exists, resulting in little improvement in the photoluminescence efficiency of polyimides.

Method used

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  • A kind of flexible luminous polyimide film and its preparation method and application
  • A kind of flexible luminous polyimide film and its preparation method and application
  • A kind of flexible luminous polyimide film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] At room temperature, 3.4142g (0.01mol) 4,4'-(4-(p-tolyl)-4H-1,2,4-triazole-3,5-diyl) dianiline and 43ml of N,N-dimethyl Add methyl formamide into a 100ml three-necked flask, and pass through argon. After stirring and dissolving completely, add 3.1022g (0.01mol) of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, and continue to stir and react at room temperature for 8 hours to obtain a homogeneous, transparent, viscous polyamide acid solution. Scrape-coat the obtained polyamic acid solution on a clean glass plate, then place the glass plate in a vacuum oven, and raise the temperature according to the temperature rise program under vacuum: the room temperature is raised to 100°C and then the temperature is kept constant. The whole process takes 60 minutes; and then After the temperature is raised to 200°C, the temperature is kept constant, and the whole process takes 60 minutes; after the temperature is finally raised to 300°C, the temperature is kept constant, and...

Embodiment 2

[0040] At room temperature, 5.8172g (0.01mol)

[0041] 4,4'-(4-(4'-(2,2-diphenylvinyl)-[1,1'-biphenyl]-4-yl)-4H-1,2,4-triazole-3,5-diyl) Dianiline and 68ml of N,N-dimethylformamide were added to a 100ml three-necked flask, and argon was introduced. After stirring and dissolving completely, add 4.4424g (0.01mol) 4,4'-hexafluoroisopropyl phthalic anhydride, and continue to stir and react at room temperature for 12 hours to obtain a homogeneous, transparent and viscous polyamic acid solution . Add a mixed solution containing 5ml of acetic anhydride and 2.5ml of pyridine to the obtained polyamic acid solution, and after stirring at room temperature for 24 hours, slowly pour the polyimide solution into 1L of methanol to obtain a fibrous or spherical precipitate, which is filtered out After precipitation, dry in an oven. The obtained solid was then dissolved in N,N-dimethylformamide, scraped onto a clean glass plate, placed in a vacuum oven, heated to 100°C for 2 hours, and then he...

Embodiment 3

[0045] At room temperature, 5.6971g (0.01mol)

[0046] 4,4'-(4-(4-tritylphenyl)-4H-1,2,4-triazole-3,5-diyl)dianiline and 58ml of N,N-dimethylformamide were added to a 100ml three-necked flask, Bubble argon. After stirring and dissolving completely, add 3.1022g (0.01mol) of 3,3',4,4'-diphenyl ether tetracarboxylic dianhydride, and continue to stir and react for 8 hours at room temperature to obtain a homogeneous, transparent, viscous polyamide acid solution. Polyamic acid was thermally imidized according to the method in Example 1 to obtain polyimide film PI3. The thickness of the polyimide film is about 35 μm, the absolute fluorescence quantum yield is 10%, the wavelength corresponding to the strongest fluorescence peak is 536nm, the 5% thermal weight loss temperature is 491°C, and the glass transition temperature is 310°C (by DMA). The infrared spectrum of the polyimide film is shown in figure 1 The PI3 is shown.

[0047] The molecular structural formula of the flexible...

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Abstract

The invention discloses a flexible luminous polyimide film, a preparation method and application thereof. The polyimide material of the present invention adopts aromatic diamine with strong electron-withdrawing structure 1,2,4-triazole and various dianhydrides as raw materials, reacts to obtain polyamic acid solution, and then imidizes and coats prepared. The flexible polyimide film of the present invention not only has high photoluminescent efficiency, but also has high glass transition temperature and thermal stability, excellent mechanical properties, etc., and is suitable for preparing photoluminescent products and flexible electroluminescent devices luminescent layer material.

Description

technical field [0001] The invention relates to the field of material science, in particular to a flexible light-emitting polyimide film and its preparation method and application. [0002] technical background [0003] Polyimide is a class of high-performance polymers containing imide rings in the main chain. It has the advantages of high mechanical strength, high and low temperature resistance, chemical corrosion resistance, good dimensional stability and dielectric properties. It is used in aerospace, aerospace, It has a wide range of applications in microelectronic devices, liquid crystal displays and other fields. On the other hand, with the progress of display technology, organic light-emitting diodes (Organic Light-Emitting Diode, OLED) with its active light, full-color display, low power consumption, low start-up voltage, high brightness, fast response, wide viewing angle, processing technology The advantages of simplicity and low cost have become one of the research...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08G73/10C08J5/18H01L51/54C09K11/06
CPCC09K11/06C08G73/1067C08G73/1071C08J5/18C08L79/08C08L2203/16C08L2203/20C08L2201/08C08J2379/08C09K2211/1466H10K85/111
Inventor 张艺周竹欣许家瑞刘四委池振国
Owner SUN YAT SEN UNIV
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