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A kind of polyimide with photochromic performance and its preparation method and application

A photochromic and polyimide technology, applied in the field of material science, can solve the problems of chemical corrosion resistance, high and low temperature resistance and extreme environment, etc., and achieve the effects of low condition requirements, excellent solubility, and simple and diverse preparation processes.

Active Publication Date: 2021-05-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some progress has been made in the color-changing contrast and fatigue resistance of photochromic polymer materials, the speed of light transition and the performance of polymer materials, such as chemical corrosion resistance, high and low temperature resistance and extreme environments, need to be solved urgently.

Method used

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  • A kind of polyimide with photochromic performance and its preparation method and application
  • A kind of polyimide with photochromic performance and its preparation method and application
  • A kind of polyimide with photochromic performance and its preparation method and application

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preparation example Construction

[0040] The above-mentioned preparation method of polyimide with photochromic performance is characterized in that:

[0041] Method (1): In a nitrogen or argon atmosphere, combine a diamine monomer containing a Y structure or a mixed diamine monomer containing a Y and Z structure with a dianhydride monomer containing an X structure or a diamine monomer containing a X and W structure Mixed dianhydride monomers are dissolved in an aprotic polar organic solvent at a molar ratio of 1:(1 to 1.2) (the molar ratio is most preferably 1:1.02), at -10°C to 40°C (most preferably -10°C ) stirring and reacting for 6 to 72 hours to obtain a polyamic acid solution, and then carry out dehydration imidization to obtain a photochromic polyimide such as the general formula (1); wherein the diamine monomer containing the Y structure is as shown in the structural formula ( five):

[0042]

[0043] where each J is independently taken from O or S, each E is independently taken from C or N, and ea...

Embodiment 1

[0054] The diketone compound was synthesized by Friedel-Crafts acylation reaction of 2-methyl-5-chlorothiophene and glutaryl chloride, and diketone was self-coupled to obtain dichloride. Cyclopentene compound; dichlorocyclopentene compound reacts with tributyl borate to obtain borate compound, and reacts with p-bromoaniline and bromine-containing phthalate to obtain the target diamine mono-diamine with Y structure through suzuki reaction body.

[0055] At -10°C, 4.4264g (0.01mol) of diamine monomer and 23ml of N,N-dimethylformamide were added into a 100ml three-necked flask, and argon gas was introduced. After stirring and dissolving completely, 2.2865 g (0.0102 mol) of hydrogenated pyromellitic dianhydride was added, and stirring was continued at room temperature for 72 hours to obtain a homogeneous, transparent, viscous polyamic acid solution. Add 18.78ml of acetic anhydride and 7.51ml of pyridine into the obtained polyamic acid solution, continue to stir and react at room ...

Embodiment 2

[0061] At -10°C, 4.4264g (0.01mol) of a diamine monomer having a Y structure and 23ml of N,N-dimethylformamide were added to a 100ml three-necked flask, and argon gas was introduced. After stirring and dissolving completely, add 4.5312g (0.0102mol) 4,4-hexafluoroisopropylphthalic anhydride (6-FDA), and continue to stir and react at room temperature for 72 hours to obtain a homogeneous, transparent, viscous Polyamic acid solution. Add 18.78ml of acetic anhydride and 7.51ml of pyridine into the obtained polyamic acid solution, continue to stir and react at room temperature for 24 hours, then slowly pour the obtained polyimide solution into 1L of methanol to obtain a powdery precipitate, filter out the precipitate Place in oven to dry. The 5% thermal weight loss temperature of this polyimide was 398 degreeC, and the glass transition temperature was 277 degreeC. PI-2 can be dissolved in dichloromethane, chloroform, tetrahydrofuran and strong polar N,N-dimethylformamide, N,N-dime...

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Abstract

The invention discloses a polyimide with photochromic performance and its preparation method and application. By adjusting the molecular structure of photochromic diamine monomer or photochromic dianhydride monomer, different color changes can be obtained , the target monomer can be copolymerized or homopolymerized with commercial diamine or dianhydride, and the obtained polyimide material has good thermal properties and solubility properties. The photochromic polyimide provided by the present invention has optical responses of different color changes, and has excellent solubility, high glass transition temperature and thermal stability, and the preparation process is simple and diverse, and the condition requirements are low, so Suitable for industrial production. The polyimide material of the invention can obtain a nanoscale thin film through a spin coating method, and is suitable for preparing photochromic glass films and optical information storage device materials.

Description

technical field [0001] The invention relates to the field of material science, in particular to a class of photochromic polyimide and its preparation method and application. [0002] technical background [0003] Photochromic materials refer to a class of materials that undergo reversible color changes under specific wavelengths of light, which are accompanied by obvious changes in physical and chemical properties such as absorption spectrum and dielectric constant during the photoisomerization process. Color-changing materials include inorganic and organic. Organic photochromic materials have the characteristics of adjustable molecular structure, sensitivity to light sources, and fast response speed. Common organic photochromic materials include spiropyrans, spirooxazines, azobenzenes, diarylethenes, Schiff bases, etc. Photochromic small molecule organic materials are relatively mature in structure design and performance improvement, such as CN107522688A. However, small or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/10C08J5/18C09K9/02
CPCC08G73/1085C08J5/18C08J2379/08C09K9/02C09K2211/1483
Inventor 张艺黄文秀瞿伦君龙禹波周竹欣刘四委池振国许家瑞
Owner SUN YAT SEN UNIV
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