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Preparation method for polyimide film

A polyimide film and imide technology, applied in the field of polymer materials, can solve problems such as poor light transmittance, and achieve the effects of good light transmittance, improved solubility, and increased distance

Active Publication Date: 2012-08-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of perfluorinated polyimide is orange or brown, and the light transmittance is not good

Method used

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Examples

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preparation example Construction

[0026] The embodiment of the invention discloses a preparation method of a polyimide film, comprising the following steps:

[0027] A) mixing triphenylene ether tetracarboxylic dianhydride mixture and 2,2'-bistrifluoromethyl-4,4'-biphenylenediamine in an organic solvent to obtain a polyamic acid solution;

[0028] The triphenylene ether tetracarboxylic dianhydride mixture includes 2,3,3',4'-triphenylene ether tetracarboxylic dianhydride, 3,3',4,4'-triphenylene ether tetracarboxylic dianhydride and 2,2',3,3'-Triphenylene ether tetracarboxylic dianhydride;

[0029] B) the polyamic acid solution in the step A) is reacted under the action of a dehydrating agent and an imide catalyst to obtain a polyimide solution;

[0030] C) Casting the polyimide solution in the step B) into a film to obtain a polyimide film.

[0031] The present invention uses triphenylene ether tetracarboxylic dianhydride mixture and 2,2'-bistrifluoromethyl-4,4'-biphenylenediamine as raw materials, and the tr...

Embodiment 1

[0067] Add 109.5g of 3-chlorophthalic anhydride and 55.9g of aniline into 200ml of xylene, heat to reflux under the protection of nitrogen, azeotropically remove water for 5 hours, stop heating after no water evaporates, and when the temperature drops to room temperature, crude product. The crude product was filtered, washed three times with ethanol, and vacuum-dried at 80° C. to obtain 146.1 g of N-phenyl-3-chlorophthalimide with a yield of 94.5%.

[0068] Add 109.5g of 4-chlorophthalic anhydride and 55.9g of aniline into 200ml of xylene, heat to reflux under the protection of nitrogen, azeotropically remove water for 5 hours, stop heating after no water evaporates, and precipitate crude product. The crude product was filtered, washed three times with ethanol, and vacuum-dried at 80° C. to obtain 145.6 g of N-phenyl-4-chlorophthalimide with a yield of 94.2%.

[0069] Add 55.0g (0.50mol) of hydroquinone and 40g (1.0mol) of sodium hydroxide to a mixed solution of 400ml of N,N...

Embodiment 2

[0072] At room temperature, dissolve 6.4052 g of 2,2'-bistrifluoromethyl-4,4'-biphenylenediamine into 49 g of dimethylformamide, stir mechanically, and after it is completely dissolved, under stirring conditions Add 5.8845 g of the triphenylenediyl ether tetracarboxylic dianhydride mixture prepared in Example 1 therein. Stirring was continued for 24 hours to form a polyamic acid glue solution with a solid content of 20 wt%.

[0073] The obtained polyamic acid glue was left standing still for 24 hours. After the air bubbles were eliminated, it was cast on a clean glass plate and baked in an oven at 80° C. for 2 hours to cure the film. Move the glass plate coated with polyimide film into a high-temperature oven, heat the high-temperature oven from room temperature to 350 °C at a rate of 2 °C / min, turn off the high-temperature oven and let the temperature drop to room temperature naturally, and take out the coated glass plate from the oven. A glass plate with polyimide is placed...

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Abstract

The invention provides a preparation method for a polyimide film. The preparation method includes hybrid reaction for bis(dicarboxyphenoxy) benzene dianhydride mixture and 2,2'- bis(trifluoromethyl)-4 and 4'- benzidine is performed in organic solvent to obtain polyamide acid liquor; the bis(dicarboxyphenoxy) benzene dianhydride mixture comprises 2, 3, 3', 4'- bis(dicarboxyphenoxy) benzene dianhydride, 3, 3', 4, 4'- bis(dicarboxyphenoxy) benzene dianhydride and 2, 2', 3, 3'- bis(dicarboxyphenoxy) benzene dianhydride; the polyamide acid liquor is sufficiently reacted under effects of dehydrating agent and imide catalyst so as to obtain polyimide solution; and the polyimide solution is in curtain coating to form a film, so that the polyimide film is obtained. The prepared polyimide film has good light transmission and dissolubility.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method of a polyimide film. Background technique [0002] Amorphous silicon solar cells with flexible substrates have been paid more and more attention. It can be bent arbitrarily, is easy to install and carry, and has been widely used in aviation and aerospace fields. It is an indispensable energy component for adjacent space powered airships. Flexible Substrate The substrate of amorphous silicon solar cells can be metal or transparent polymer film. Since the metal substrate is opaque, the conductive film can only be deposited on the amorphous silicon film. The obtained conductive film has low transmittance and high resistivity, and will have a degrading effect on the amorphous silicon film, thereby reducing the conversion efficiency of the battery. Using a transparent polymer film as a substrate can directly form a nano-indium tin oxide (ITO) conductive film on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/08C08G73/10
Inventor 朱丹阳杨正华张春华吴作林韩宝春
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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