Flexible display substrate material and preparation method thereof

A flexible display and substrate technology, applied in the field of flexible materials, can solve the problems of poor water vapor barrier, failure to meet the performance requirements of flexible display substrates, poor heat resistance, etc., and achieve excellent toughness, easy laser peeling, and good in-plane isotropy Effect

Active Publication Date: 2018-11-16
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

However, these polymer substrate materials either have poor heat resistance or poor water vapor barrier properties, and the thermal expansion coefficients of all polymer substrate materials exceed 20ppm / °C, which cannot meet the performance requirements of flexible display substrates below 5ppm / °C

Method used

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  • Flexible display substrate material and preparation method thereof
  • Flexible display substrate material and preparation method thereof
  • Flexible display substrate material and preparation method thereof

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preparation example Construction

[0039] The invention provides a method for preparing a flexible display substrate material, which is characterized in that it comprises the following steps:

[0040] a) polymerizing aromatic dianhydride, aromatic diamine and inorganic nanoparticles in a solvent to obtain a reaction solution;

[0041] b) capping the reaction solution with aminosiloxane to obtain polyamic acid slurry;

[0042] c) heat-treating the polyamic acid slurry to obtain a flexible display substrate material.

[0043] According to the present invention, the aromatic dianhydride, aromatic diamine and inorganic nanoparticles are polymerized in a solvent to obtain a reaction liquid.

[0044] In the present invention, preferably, the aromatic dianhydride is selected from one or more of the compounds represented by formula (1);

[0045]

[0046] Among them, R 1 Preferably it is the structure shown in formula (1-1), formula (1-2), formula (1-3) or formula (1-4):

[0047]

[0048] In the present invent...

Embodiment 1

[0086] 2,5-bis(4-aminophenyl)pyrimidine (1.836g, 7.00mmol), 4,4'-diaminodiphenyl ether (0.200g, 1.00mmol) and nano-silica (0.15g) were added to N , N-dimethylacetamide (25g), stirred at room temperature. Add pyromellitic dianhydride (1.845g, 8.46mmol), stir at room temperature and react for 24 hours, add aminopropyltriethoxysilane (0.204g, 0.92mmol), react for 2h, and obtain a rotational viscosity of 1×10 4 cPS polyamic acid slurry. Coat the polyamic acid slurry on the glass, place it in an oven and heat it to 400° C., and heat it for 120 minutes to obtain a polyimide-based film material.

Embodiment 2

[0088]2,5-bis(4-aminophenyl)pyridine (1.882g, 7.20mmol), 3,3′-dimethyl-4,4′-diaminobiphenyl (0.170g, 0.80mmol) and nano-oxidized Silicon (0.15g) was added into N,N-dimethylacetamide (25g), and stirred evenly at room temperature. Add 4,4'-biphenyl dianhydride (2.477g, 8.42mmol), stir at room temperature and react for 24 hours, add aminopropyltrimethoxysilane (0.151g, 0.84mmol), react for 2.5h, and the rotational viscosity is 1×10 4 cPS polyamic acid slurry. Coat the polyamic acid slurry on the glass, place it in an oven and heat it to 400° C., and heat it for 120 minutes to obtain a polyimide-based film material.

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Abstract

The invention provides a flexible display substrate material and a preparation method thereof. The preparation method of the flexible display substrate material provided by the invention comprises thefollowing steps: a) carrying out a polymerization reaction on aromatic dianhydride, aromatic amine and inorganic nanoparticles in a solvent so as to obtain a reaction solution; b) carrying out an endcapping reaction on the reaction solution and amino siloxane so as to obtain polyamide acid slurry; c) performing heat treatment on the polyamide acid slurry, thereby obtaining the flexible display substrate material. The preparation method provided by the invention can achieve the effects of obviously improving the toughness of the material, improving the heat resistance, reducing the thermal expansion coefficient and producing excellent water oxygen barrier property, and the flexible display substrate material with excellent comprehensive performance can be obtained.

Description

technical field [0001] The invention relates to the technical field of flexible materials, in particular to a flexible display substrate material and a preparation method thereof. Background technique [0002] At present, color flat panel display technology not only pursues high image quality and low power consumption, but also gradually develops in the direction of flexibility, flexibility, and thinness. Flexible flat panel display technology has greatly expanded the application scenarios and imagination space of traditional display screens, and made it possible for the birth of more downstream applications, such as the preparation of foldable mobile phones, electronic newspapers, rollable TVs and wearable displays that people dream of. etc. [0003] According to the processing and application requirements of flexible display devices, substrate materials for flexible displays need to have specific performance requirements, such as: extremely high heat resistance, low therm...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08K3/36C08K3/22C08K3/26C08K3/24C08J5/18C08L79/08
CPCC08G73/1007C08G73/1042C08G73/1071C08J5/18C08J2379/08C08K3/22C08K3/24C08K3/26C08K3/36C08K2003/222C08K2003/2227C08K2003/2241C08K2003/2296C08K2003/265C08K2201/011
Inventor 郭海泉杨正慧陈文慧马平川宋玉春高连勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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