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High-performance luminescent polyimide, and preparation method and application thereof

A polyimide, high-performance technology, applied in the field of material science, can solve the problem that the photoluminescence efficiency of polyimide is not greatly improved, and achieve a simple and diverse preparation process, excellent mechanical properties, and obvious aggregation-induced luminescence. Effect

Inactive Publication Date: 2017-09-01
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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  • High-performance luminescent polyimide, and preparation method and application thereof
  • High-performance luminescent polyimide, and preparation method and application thereof
  • High-performance luminescent polyimide, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041]At room temperature, 5.1467g (0.01mol)

[0042] Add 5'-(1,2,2-triphenylvinyl)-[1,1':3',1”-terphenyl]-4,4”-diamine and 37 ml of N,N-dimethylformamide to 100ml In the three-necked flask, argon was introduced. After stirring and dissolving completely, 2.2417 g (0.01 mol) of hydrogenated pyromellitic dianhydride was added, and the stirring reaction was continued at room temperature for 36 hours to obtain a homogeneous, transparent and viscous polyamic 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 ...

Embodiment 2

[0046] At room temperature, 5.1467g (0.01mol)

[0047] Add 5'-(1,2,2-triphenylvinyl)-[1,1':3',1”-terphenyl]-4,4”-diamine and 55ml of N,N-dimethylformamide to 100ml The flask was filled with 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 12 hours to obtain a homogeneous, transparent, viscous polyamide 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 heated to 200°C for 2 hours. After cooling...

Embodiment 3

[0051] At room temperature, 5.1467g (0.01mol)

[0052] Add 5'-(1,2,2-triphenylvinyl)-[1,1':3',1”-terphenyl]-3,3”-diamine and 64ml of N,N-dimethylformamide to 100ml The flask was filled with argon. After stirring and dissolving completely, add 4.4424g (0.01mol) 4,4'-hexafluoroisopropylphthalic anhydride, and continue to stir and react at room temperature for 8 hours to obtain a homogeneous, transparent and viscous polyamic acid solution . The polyamic acid was chemically imidized according to the method in Example 2 to obtain a polyimide film PI3. The polyimide film has aggregation-induced luminescent properties, the wavelength corresponding to the strongest fluorescent peak is 533nm, the 5% thermal weight loss temperature is 569°C, and the glass transition temperature is 286°C. The infrared spectrum of the polyimide film is shown in figure 1 The PI3 is shown.

[0053] The molecular structural formula of the high-performance light-emitting polyimide in the present embodime...

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Abstract

The invention discloses high-performance luminescent polyimide, and a preparation method and an application thereof. The polyimide material is prepared through reacting aromatic diamine with aggregation-induced luminescence (enhanced) characteristics and various dianhydrides as raw materials to obtain a polyamide acid solution and then carrying out imidization. The polyimide has an obvious aggregation-induced luminescence (enhanced) effect, high luminous intensity, high glass-transition temperature and thermal stability and excellent mechanical properties, and is suitable for preparation of luminescent layer materials in photoluminescent products and flexible electroluminescent devices.

Description

technical field [0001] The invention relates to the field of material science, in particular to a class of high-performance light-emitting polyimide 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 ...

Claims

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Application Information

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IPC IPC(8): C08G73/10C09K11/06
CPCC09K11/06C08G73/1007C08G73/1032C08G73/1039C08G73/1071C08G73/1078C08J5/18C08J2379/08C09K2211/1466
Inventor 张艺周竹欣杨婷婷孟玥许家瑞刘四委池振国
Owner SUN YAT SEN UNIV
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