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High-barrier transparent flexible display material and preparation method thereof

A flexible display and high barrier technology, which is applied in the field of flexible materials, can solve the problems of easy brittleness and falling off of barrier properties, affecting the transparency of flexible display materials, and insufficient flexibility.

Active Publication Date: 2018-12-14
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, aluminum oxide layers, etc. 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 properties are easy to break and fall off, and cannot achieve long-term improvement in water and oxygen barrier properties, and adding a barrier layer will easily affect the transparency of flexible display materials

Method used

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

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preparation example Construction

[0057] A method for preparing a high-barrier transparent flexible display substrate material, comprising the following steps:

[0058] a) heating and reacting an anionic two-dimensional layered material with an organic intercalation agent in a solvent to obtain a layered material modified by organic intercalation;

[0059] b) exfoliating the layered material modified by organic intercalation in a solvent to obtain a nanosheet dispersion;

[0060] c) mixing the nanosheet dispersion with polyimide polymerized monomers and performing in-situ polymerization to obtain polyamic acid slurry;

[0061] d) heat-treating the polyamic acid slurry to obtain a flexible display substrate material;

[0062] The anionic two-dimensional layered material is one or more of binary metal hydroxides and multi-element metal hydroxides;

[0063] The organic intercalation agent is selected from one or more of organic carboxylic acids, organic sulfonic acids, metal salts of the organic carboxylic acid...

Embodiment 1

[0126] Hydroxybutyric acid (2.29 g, 0.022 mol) and magnesium aluminum hydrotalcite (6.04 g, 0.01 mol) were added into ethylene glycol (100 mL), heated to 130° C., and reacted for 12 h. After that, the solid matter was filtered out and dried to obtain hydroxybutyric acid intercalated modified hydrotalcite with a yield of 98%. 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 the hydrotalcite modified by hydroxybutyric acid intercalation in Example 1. It can be seen that there is an obvious characteristic peak at 2θ=6.0°, and the interlayer distance is enlarged to 1.47nm according to the Bragg equation.

[0127] The obtained hydroxybutyric acid intercalation-modified hydrotalcite (0.11 g) was added to N,N-dimethylacetamide (20.0 g), and ultrasonicated at room temperature for 3 h to obtain a dispersion of exfoliated and dispersed hydrotalcite nanosheets. Add 2,2'-bis(trifl...

Embodiment 2

[0129] Add 4-hydroxybenzoic acid (3.18g, 0.023mol) and magnesium aluminum hydrotalcite (6.04g, 0.01mol) into ethylene glycol (100mL), heat to 160°C, and react for 12h. Afterwards, the solid matter was filtered out and dried to obtain 4-hydroxybenzoic acid intercalation-modified hydrotalcite 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 the hydrotalcite modified by 4-hydroxybenzoic acid intercalation in Example 2. It can be seen that there is an obvious characteristic peak at 2θ=9.6°, and the interlayer distance is enlarged to 0.89nm calculated by combining the Bragg equation.

[0130] The resulting 4-hydroxybenzoic acid intercalation-modified hydrotalcite (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 hydrotalcite nanosheets. 1,4-Diaminocyc...

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Abstract

The invention relates to a high-barrier transparent flexible display material and a preparation method thereof. The preparation method comprises the following steps: firstly heating an anionic two-dimensional layered material and an organic intercalation agent in a solvent, then performing a stripping treatment in the solvent, mixing the material with a polymerization monomer of polyimide and performing in-situ polymerization, and finally performing heat treatment to obtain the flexible display substrate material. The material obtained by the preparation method of the present invention has high water-oxygen barrier property, excellent thermal stability, low thermal expansion coefficient, and high transparency and the like, and is the flexible material excellent in 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, 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. And so on, and flexible, flexible, thin and light flexible displays, touch devices, etc., have gradually become essential elements of high-tech products in the electronics field. [0003] According to the processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K9/04C08K3/26C09D179/08C09D7/62C08J5/18G09F9/30
CPCC08J5/18C08J2379/08C09D7/62C09D179/08G09F9/301C08K9/04C08K3/26
Inventor 郭海泉杨正慧马平川陈文慧宋玉春高连勋
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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