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Soluble functional polyimide based on fluorene structure as well as preparation method and application thereof

A polyimide, soluble technology, applied in the field of soluble functional polyimide and its preparation, can solve the problem of single variety, and achieve the effects of simple preparation process, excellent photoluminescence, and excellent solubility

Active Publication Date: 2013-07-24
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past two years, soluble functionalized polyimide based on triphenylamine structure has shown attractive application prospects in the application of polymer storage materials due to its unique resistance switching effect, which has aroused the interest of researchers in this field. Attention, however, the development and research of functional polyimide is still in its infancy, the variety is relatively single, and its function needs to be further developed

Method used

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  • Soluble functional polyimide based on fluorene structure as well as preparation method and application thereof
  • Soluble functional polyimide based on fluorene structure as well as preparation method and application thereof
  • Soluble functional polyimide based on fluorene structure as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] At room temperature, mix 5.3661g (0.01mol) 4-(9-(4-aminophenyl)-2,7-bis(4-fluorophenyl)-9H-fluoren-9-yl)benzenamine(Wu-F) and 57.3g( 60.7ml) N,N-dimethylformamide was added to a 100ml three-necked flask, argon was passed through, stirred, and after complete dissolution, add 3.2223g (0.01mol) 3,3′,4,4′-Benzophenonetetracarboxylic dianhydride (3,3',4,4'-benzophenonetetracarboxylic dianhydride, BTDA), continue to stir and react for 6 hours to obtain a homogeneous transparent viscous polyamic acid solution. Then the polyamic acid solution was scraped on the glass plate, and the glass plate was placed in a vacuum oven and vacuumed. The heating program was as follows: the room temperature was raised to 100°C and the temperature was kept constant throughout the process for 1h→100°C was raised to 200°C and then the temperature was kept constant The process is 1h→200°C to 350°C and the temperature is kept constant for 1.5h. The polyimide film can be taken out after cooling. The ...

Embodiment 2

[0036] At room temperature, mix 5.3661g (0.01mol) 4-(9-(4-aminophenyl)-2,7-bis(4-fluorophenyl)-9H-fluoren-9-yl)benzenamine(Wu-F) and 511g(58.4 ml) N,N-Dimethylformamide was added to a 100ml three-necked flask, argon was passed through, stirred, and after it was completely dissolved, 2.9027g (0.01mol) 4,4′-Biphthalic Anhydride was added. Anhydride, BPDA), continue to stir and react for 6 hours to obtain a homogeneous transparent viscous polyamic acid solution. Then the polyamic acid solution was scraped on the glass plate, and the glass plate was placed in a vacuum oven and vacuumed. The heating program was as follows: the room temperature was raised to 100°C and the temperature was kept constant throughout the process for 1h→100°C was raised to 200°C and then the temperature was kept constant The process is 1h→200°C to 350°C and the temperature is kept constant for 1.5h. The polyimide film can be taken out after cooling. The 5% thermal weight loss temperature of the polyimide ...

Embodiment 3

[0040] Prepare the polyamic acid solution in the same manner as in Example 2, and then use chemical imidization to prepare polyimide. The steps are as follows: add 5 mL of acetic anhydride to the obtained polyamic acid solution, continue to stir, and then slowly add 2.5 mL of three Ethylamine, heated to 70°C, continue to stir for 6h, and then the solution is scraped onto a clean glass plate, then the glass plate is placed in a vacuum oven, vacuumed, and dried at 100°C for 12h. After cooling, the polyimide film can be taken out. The 5% weight loss temperature of the polyimide film is 569° C., and the wavelength of the strongest fluorescence peak is 540 nm. The infrared spectrum of the polyimide film is the same as that of Example 2.

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Abstract

The invention discloses a soluble functional polyimide based on fluorene a structure as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out a reaction on fluorene-containing aromatic diamine having a non-plane large conjugation structure and various tetracid dianhydride so as to obtain a polyimide solution; and carrying out imidization so as to obtain the soluble polyimide material. The soluble polyimide material has good solubility, can be dissolved in conventional organic solvents such as NMP(N-methyl-2-pyrrolidone),DMSO(dimethylsulfoxide),DMAc(dimethylacetylamide), DMF(dimethyl formamide), m-Cresol, THF(tetrahydrofuran) and like and has high properties such as glass-transition temperature, thermal stability, photoluminescence and the like. The synthesis method has simple process and diversity, thus the method is suitable for industrial production; the polyimide disclosed by the invention can be applied to preparation of photoluminescence products, can be widely applied to high and new technology industry fields such as electron, microelectron, information, luminescent materials, aerospace and the like.

Description

Technical field [0001] The invention relates to the field of materials science, in particular to a soluble functional polyimide based on a fluorene structure, and a preparation method and application thereof. technical background [0002] Polyimide is one of the best heat-resistant varieties in the industrialized engineering plastics. It has outstanding properties that other materials cannot match, such as high mechanical strength, good high and low temperature resistance, excellent dielectric properties, and film-forming properties. Okay wait. Since the industrialization of DuPont in the United States in the 1960s, it has been applied in various fields, especially in aerospace, aviation, microelectronics and military industries. Since polyimide is generally insoluble in organic solvents, it is usually processed with a good soluble precursor polyamic acid, and then subjected to dehydration and ring-closure imidization to obtain polyimide. However, polyamic acid is more sensitiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08J5/18C09K11/06
Inventor 张艺刘亦武许家瑞秦泽鑫陈亮辉兰麒刘四委池振国
Owner SUN YAT SEN UNIV
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