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Colorless highly-transparent polyimide film as well as preparation method and application thereof

A technology of aromatic polyimide and aromatic polyimide resin, which is applied in the fields of colorless and highly transparent polyimide film and its preparation and application, and can solve the problem that the light transmittance is only 78%.

Active Publication Date: 2012-08-15
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But we use the same resin system and preparation method to obtain the film, when the thickness is 50μm, the light transmittance at 450nm is only 78%

Method used

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  • Colorless highly-transparent polyimide film as well as preparation method and application thereof
  • Colorless highly-transparent polyimide film as well as preparation method and application thereof
  • Colorless highly-transparent polyimide film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Embodiment 1, the preparation of homopolymer polyimide film

[0057] In a three-neck flask equipped with a mechanical stirrer, a water separator, a nitrogen inlet and outlet, and a thermometer, add 56.85 grams (0.1 moles) of 4,4'-bis(3-trifluoromethyl-5-aminophenoxy)diphenylsulfone and 143 milliliters of N-methylpyrrolidone (NMP), stirred under nitrogen protection until completely dissolved, then added 22.42 grams (0.1 mole) of 1,2,4,5-cyclohexanetetracarboxylic dianhydride (CHDA), Stir until completely dissolved to obtain a homogeneous solution with a solid content of 35 wt.%. 0.65 g (0.005 mole) of isoquinoline and 24 ml of toluene were added to the above homogeneous solution, the temperature of the reaction system was raised to 180° C. and reacted for 24 hours, the toluene was distilled off, and the heating was stopped. Cool the reaction solution to 80-120°C and pour it into ethanol to obtain a fibrous crude product. Collect the precipitated crude product, wash it r...

Embodiment 2

[0061] Embodiment 2, the preparation of homopolymeric polyimide film

[0062] In a three-neck flask equipped with a mechanical stirrer, a water separator, a nitrogen inlet and outlet, and a thermometer, add 56.85 grams (0.1 moles) of 4,4'-bis(2-trifluoromethyl-4-aminophenoxy)diphenylsulfone and 173 milliliters of N-methylpyrrolidone (NMP), stirred under nitrogen protection until fully dissolved, added 19.61 grams (0.1 mole) of 1,2,3,4-cyclobutanetetracarboxylic dianhydride (CBDA), stirred Until it is completely dissolved, a homogeneous solution with a solid content of 30wt.% is obtained. 0.13 g (0.001 mole) of isoquinoline and 30 ml of toluene were added to the above homogeneous solution, the temperature of the reaction system was raised to 180° C. and reacted for 12 hours, the toluene was distilled off, and the heating was stopped. Cool the reaction solution to 80-120°C and pour it into ethanol to obtain a fibrous crude product. Collect the precipitated crude product, wash i...

Embodiment 3

[0066] Embodiment 3, the preparation of homopolymer polyimide film

[0067] In a three-necked flask equipped with a mechanical stirrer, a water separator, a nitrogen inlet and outlet, and a thermometer, add 40.35 grams (0.105 moles) of 2,2'-bis(trifluoromethyl)-4,4'-diaminodiphenylsulfone and In 228 milliliters of γ-butyrolactone, after stirring under nitrogen protection until completely dissolved, add 23.62 grams (0.1 moles) of bicyclo[2.2.1]heptane-2,3,5,6-tetracarboxylic dianhydride (BHDA) , and stirred until completely dissolved to obtain a homogeneous solution with a solid content of 20wt.%. 1.29 g (0.01 mole) of quinoline and 55 ml of toluene were added to the above homogeneous solution, the reaction system was heated to 180° C. and reacted for 12 hours, the toluene was distilled off, and the heating was stopped. Cool the reaction solution to 80-120°C and pour it into a propanol / water mixed solution (propanol / water volume ratio = 1:2) to obtain a fibrous crude product, ...

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Abstract

The invention discloses a colorless highly-transparent polyimide film as well as a preparation method and an application thereof. The film is prepared from semi-aromatic polyimide resin of which the structural formula is shown as formula I, wherein Al is an alicyclic structure, R1 is an aromatic diamine structure containing fluorine and sulfone, R2 is another aromatic diamine structure, and n:m=(0-400):1. The film has excellent optical transparency, colorless transparency of the film with great thickness (greater than or equal to 100 mu m) can be realized, the initial light-transmitting wavelength is below 300nm, and the light transmittance in a visible region is greater than or equal to 90%; and meanwhile, the film shows excellent heat resistance and mechanical property, and has important application values in the manufacturing of the photoelectric devices such as a solar battery, a display, an electronic book, an electronic label, a photoelectric sensor and the like.

Description

technical field [0001] The invention relates to a colorless and highly transparent polyimide film, a preparation method and application thereof. Background technique [0002] With the rapid development of the field of optoelectronics, optoelectronic devices such as solar cells, liquid crystal displays (LCDs), organic electroluminescent displays (OLEDs), e-books, electronic tags, photoelectric sensors, etc. Trends in thinning and flexibility. In the manufacture of optoelectronic devices such as solar cells and displays, glass as a traditional transparent substrate material is difficult to solve when it is further enlarged and thinned due to its hard and brittle characteristics, and the brittleness of glass makes it impossible It is free to bend, so it cannot meet the development requirements of future flexible packaging technology. At present, high-transparency polymer materials have attracted more and more attention as a new generation of flexible optoelectronic packaging ...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08L79/08C08J5/18
Inventor 范琳翟磊杨士勇莫松
Owner INST OF CHEM CHINESE ACAD OF SCI
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