High-barrier-performance transparent and flexible display material and preparation method thereof

A flexible display, high barrier technology, applied in the field of flexible materials, can solve the problems of insufficient flexibility, the water and oxygen barrier layer is not resistant to bending, and cannot achieve long-term water and oxygen barrier properties, and achieves high water and oxygen barrier properties. The effect of excellent comprehensive performance and excellent thermal stability

Active Publication Date: 2019-02-12
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the existing technology usually adopts the construction of water and oxygen barrier layers on the surface of polymer flexible materials, such as silicon oxide and aluminum oxide layers. However, these water and oxygen barrier layers are not resistant to bending and have insufficient flexibility, which destroys the flexible display materials. The basic flexibility requirements, and these barrier layers are easy to break and fall off, and cannot achieve long-term improvement in water and oxygen barrier properties, and adding barrier layers will easily affect the transparency of flexible display materials

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  • High-barrier-performance transparent and flexible display material and preparation method thereof
  • High-barrier-performance transparent and flexible display material and preparation method thereof

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preparation example Construction

[0052] A preparation method of a high-barrier transparent flexible display substrate material, comprising the following steps:

[0053] a) heating and reacting the cationic two-dimensional layered material with an organic intercalating agent in a solvent to obtain a layered material modified by organic intercalation;

[0054] b) exfoliating the organic intercalation-modified layered material in a solvent to obtain a nanosheet dispersion;

[0055] c) mixing the nanosheet dispersion with the polymerized monomer of polyimide and performing in-situ polymerization to obtain a polyamic acid slurry;

[0056] d) heat-treating the polyamic acid slurry to obtain a flexible display substrate material;

[0057] The cationic two-dimensional layered material is aluminosilicate layered material;

[0058] The organic intercalating agent is selected from one or more of organic amine salts, quaternary ammonium salts and quaternary phosphonium salts.

[0059] In the preparation method provide...

Embodiment 1

[0119] Add aniline hydrochloride (2.29g, 0.022mol) and sodium montmorillonite (10.0g, 0.01mol) into ethanol (100mL), heat to 70°C, and react for 12h. After that, the solid matter was filtered out and dried to obtain aniline intercalation modified montmorillonite with a yield of 95%. Gained sample is carried out wide-angle X-ray diffraction test, the result is as follows figure 1 as shown, figure 1 It is the X-ray diffraction pattern of aniline intercalation modified montmorillonite in Example 1. It can be seen that there is an obvious characteristic peak at 2θ=6.5°, and the interlayer distance is enlarged to 1.38nm calculated by combining with the Bragg equation.

[0120] The obtained montmorillonite modified by aniline intercalation (0.11 g) was added into N,N-dimethylacetamide (20.0 g), and ultrasonicated at room temperature for 3 h to obtain a dispersion liquid of exfoliated and dispersed montmorillonite nanosheets. Add 2,2'-bis(trifluoromethyl)-4,4'-diaminobiphenyl (3.2...

Embodiment 2

[0122] Add 4-hydroxyaniline hydrochloride (3.18g, 0.023mol) and sodium montmorillonite (10.0g, 0.01mol) into dioxane (100mL), heat to 100°C, and react for 12h. After that, the solid matter was filtered out and dried to obtain 4-hydroxyaniline intercalated modified montmorillonite with a yield of 97%. Gained sample is carried out wide-angle X-ray diffraction test, the result is as follows figure 2 as shown, figure 2 It is the X-ray diffraction pattern of 4-hydroxyaniline intercalation modified montmorillonite in Example 2. It can be seen that there is an obvious characteristic peak at 2θ=5.1°, and the interlayer distance is enlarged to 1.73nm calculated by combining with the Bragg equation.

[0123] The resulting 4-hydroxyaniline intercalation-modified montmorillonite (0.08 g) was added to N,N-dimethylformamide (19.0 g), and ultrasonicated at room temperature for 2 h to obtain a dispersion of exfoliated and dispersed montmorillonite nanosheets. 1,4-Diaminocyclohexane (1.14...

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Abstract

The invention provides a high-barrier-performance transparent and flexible display base plate material and a preparation method thereof. The preparation method provided by the invention is characterized in that firstly, a cationic two-dimensional layered material and an organic intercalation agent are subjected to heating reaction in a solvent; then, peeling treatment is performed in the solvent;next, the mixture is mixed with polyimide polymerization monomers, and is subjected to in situ polymerization reaction; finally, heat treatment is performed; the flexible display base plate material is obtained. The material prepared by the preparation method provided by the invention has high water oxygen barrier performance, excellent heat stability, low heat expansion coefficient, high transparency and the like, and belongs to a flexible material with excellent comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of flexible materials, in particular to a high-barrier transparent flexible display substrate material and a preparation method thereof. Background technique [0002] At present, the 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 provided the possibility for the birth of more downstream application products, such as the preparation of coveted foldable mobile phones, electronic newspapers, rollable TVs and wearable displays. And so on, and flexible, flexible, thin and flexible display, touch devices, etc., have gradually become an essential element of high-tech products in the electronic field. [0003] According to the processing...

Claims

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Application Information

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IPC IPC(8): C08G73/10C08K9/04C08K3/34
CPCC08G73/1007C08G73/1039C08G73/1064C08G73/1078C08K3/346C08K9/04
Inventor 郭海泉陈文慧杨正慧马平川宋玉春高连勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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