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Soft transparent polyimide film

A transparent polyimide and polyimide resin technology, applied in the field of polymer materials, can solve the problems of insufficient flexibility and low light transmittance, and achieve the effects of improved performance, high transparency and excellent thermal performance

Active Publication Date: 2014-04-30
JIANGSU YABAO INSULATION MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problems of insufficient flexibility and low light transmittance of current luminescent materials, the present invention proposes a flexible transparent polyimide film and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] At room temperature, 1.3450 grams (0.004 moles) of 2,2'-bistrifluoromethyl-4,4'-diaminodiphenyl ether (TFODA) and 0.8725 grams (0.004 moles) of pyromellitic dianhydride (PMDA ) was dissolved in 8.87 g of N,N-dimethylacetamide, 50 mg of isoquinoline was added, heated (200° C.) under nitrogen protection for reflux reaction for 12-50 hours, cooled and poured into ethanol to precipitate polyimide resin , washing and drying with ethanol to obtain a polyimide resin;

[0030] Dissolve polyimide resin and 0.5g insect wing extract in 10g N,N-dimethylacetamide, coat the film on the substrate, first dry at 80-90°C for 3-5 hours, and then dry at 60°C For one step, the temperature was raised to 200°C, and each step was maintained for 121 minutes, then cooled naturally, and the film was stripped to obtain a flexible and transparent polyimide film.

[0031] The extraction method of the above-mentioned insect wing extract is as follows: grind the insect wing into powder, first soak it...

Embodiment 2

[0036] At room temperature, 1.3450 g (0.004 mol) of 2,2'-bistrifluoromethyl-4,4'-diaminodiphenyl ether (TFODA) and 1.1769 g (0.004 mol) of 3,3',4,4 Dissolve '-biphenyltetracarboxylic dianhydride (BPDA) in 8.87 g of N,N-dimethylacetamide, add 1 g of benzoic acid, and heat (200° C.) under nitrogen protection for reflux reaction for 12-50 hours. After cooling Pour into ethanol to precipitate polyimide resin, wash and dry with ethanol to obtain polyimide resin;

[0037] Dissolve polyimide resin and 0.7g insect wing extract in 12g N,N-dimethylacetamide, coat the film on the substrate, first dry at 80-90°C for 3-5 hours, and then dry at 60°C For one step, the temperature was raised to 250° C., and each step was maintained for 128 minutes, and then cooled naturally, and the film was stripped to obtain a flexible transparent polyimide film.

[0038] The extraction method of the above-mentioned insect wing extract is as follows: grind the insect wing into powder, first soak it in dich...

Embodiment 3

[0043] Dissolve 1.3450 g (0.004 mol) of 2,2'-bistrifluoromethyl-4,4'-diaminodiphenyl ether (TFODA) and 1.7770 g (0.004 mol) of hexafluorodianhydride (6FDA) at room temperature Add 50 mg of isoquinoline to 12.29 g of N,N-dimethylacetamide, heat (200°C) under nitrogen protection to reflux for 12-50 hours, pour into ethanol after cooling to precipitate polyimide resin, ethanol Wash and dry to obtain polyimide resin;

[0044] Dissolve polyimide resin and 0.6g insect wing extract in 15g N,N-dimethylacetamide, coat the film on the substrate, first dry at 80-90°C for 3-5 hours, and then dry at 60°C For one step, the temperature was raised to 200°C, and each step was maintained for 121 minutes, then cooled naturally, and the film was stripped to obtain a flexible and transparent polyimide film.

[0045] The extraction method of the above-mentioned insect wing extract is as follows: grind the insect wing into powder, first soak it in dichloromethane for 24-48 hours, then separate the ...

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Abstract

The invention discloses a soft transparent polyimide film and a preparation method thereof and belongs to the technical field of high polymer materials. The film disclosed by the invention comprises an insect wing extract and a polyimide polymer; diamine monomers bridged by a single ether bond are adopted, so that the reaction activity is high and the polymerization condition is mild; alicyclic dianhydride is used for breaking conjugation, so that the rigidity is large. The polyimide film disclosed by the invention has high transparency and excellent thermal performance; the insect wing extract is introduced and the softness of the film is further increased, so that the film can be widely applied to various lighting equipment and used for increasing the performance of the lighting equipment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a flexible transparent polyimide film and a preparation method thereof. Background technique [0002] In recent years, the development of luminescent materials has developed rapidly. As sealing materials for photoelectric conversion elements such as light-emitting diodes and photosensors, which are widely used, they are required to be colorless, transparent, easy to mold, and good heat resistance. With the high luminance of LEDs and the popularization of blue and ultraviolet short-wave light-emitting materials, the heat resistance and light resistance of conventional epoxy resins have been insufficient. Coloring during use, yellowing occurs, and it is difficult to maintain a colorless and transparent state for a long time. [0003] Flexible solar cell substrates can be made of stainless steel foil and thin film. Stainless steel substrates have the advantag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08K11/00C08L79/08C08J5/18
Inventor 徐伟伟杨楚罗李秋影刘战合
Owner JIANGSU YABAO INSULATION MATERIAL
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