Preparation method for polymer dispersion liquid crystal thin film

A technology for dispersing liquid crystals and polymers, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of insufficient mechanical strength of polymer networks, and the stability of electro-optic properties of PDLC films cannot meet the application requirements, and achieve low driving voltage, The effect of small shrinkage and low driving voltage

Inactive Publication Date: 2008-02-13
JIANGSU SENRAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of preparing PDLC films, the phenomenon that the mechanical strength of the polymer network is not enough, so that the stability of the electro-optic properties of the PDLC films cannot meet the application requirements

Method used

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  • Preparation method for polymer dispersion liquid crystal thin film
  • Preparation method for polymer dispersion liquid crystal thin film
  • Preparation method for polymer dispersion liquid crystal thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is a method for preparing a low-driving voltage, high-contrast PDLC film, which is carried out in the following steps:

[0029] (1) Mix 1,2-di-n-butylene phenylacetylene compound, rigid bifunctional acrylate polymerizable monomer, and methyl methacrylate in a mass ratio of 8:2:3, and use the mixed system as polymerized monomers. The chemical structure of 1,2-di-n-butylphenylacetylene is:

[0030]

[0031] The chemical structure of the rigid difunctional acrylate polymerizable monomer is:

[0032]

[0033] (2) Mix the polymerized monomers of nematic liquid crystal and polymer-dispersed liquid crystal at a mass ratio of 2:8 to form an isotropic liquid at room temperature (-0.5°C). The nematic liquid crystal selected is SLC7011-100 (Shijiazhuang Yongsheng Huaqing LCD Co., Ltd.).

[0034] (3) Evenly mix the photoinitiator, glass microspheres and isotropic liquid, sandwich them between two pieces of transparent indium tin oxide conductive glass or tr...

Embodiment 2

[0037] This embodiment is a method for preparing a low-driving voltage, high-contrast PDLC film, which is carried out in the following steps:

[0038] (1) Mix 1,2-di-n-butylphenylacetylene compound, rigid bifunctional acrylate polymerizable monomer, and methyl methacrylate in a mass ratio of 8:3:2, and use the mixed system as polymerized monomers.

[0039] (2) Mix the polymerized monomers of nematic liquid crystal and polymer-dispersed liquid crystal at a mass ratio of 6:4 to form an isotropic liquid at room temperature (-0.5°C). The nematic liquid crystal selected is SLC7011-100 (Shijiazhuang Yongsheng Huaqing LCD Co., Ltd.).

[0040] (3) Evenly mix the photoinitiator, glass microspheres and isotropic liquid, sandwich them between two pieces of transparent indium tin oxide conductive glass or transparent indium tin oxide conductive plastic film, and press evenly to form a film layer with a thickness of 18 μm . The photoinitiator is Irgacure 651 (Tokyo Chemical Company), an...

Embodiment 3

[0043] This embodiment is a method for preparing a low-driving voltage, high-contrast PDLC film, which is carried out in the following steps:

[0044] (1) Mix 1,2-di-n-butylphenylacetylene compound, rigid bifunctional acrylate polymerizable monomer, and methyl methacrylate in a mass ratio of 8:3:2, and use the mixed system as polymerized monomer.

[0045] (2) Mix the polymerized monomers of nematic liquid crystal and polymer-dispersed liquid crystal at a mass ratio of 8:2 to form an isotropic liquid at room temperature (-0.5°C). The nematic liquid crystal selected is SLC7011-100 (Shijiazhuang Yongsheng Huaqing LCD Co., Ltd.).

[0046] (3) Evenly mix the photoinitiator, glass microspheres and isotropic liquid, sandwich them between two pieces of transparent indium tin oxide conductive glass or transparent indium tin oxide conductive plastic film, and press evenly to form a film layer with a thickness of 20 μm . The photoinitiator is Irgacure 651 (Tokyo Chemical Company), and...

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Abstract

The invention pertains to liquid crystal material application and relevant fields, a method to prepare polymer dispersed liquid crystal (PDLC) film. 1,2-bipositive olefin butyl phenylacetylene compound, rigid double functional group acrylic acid ester polymerizable monomer and methyl metharcrylate are evenly mixed according to a mass ratio 8:2:3 to 8:3:2, and the mixture (taken as polymerized monomer of PDLC film) is evenly mixed with nematic liquid crystal according to a mass ratio 2:8 to 8:2, and a isotropic liquid is achieved. The isotropic liquid, photoinitiator and nano micro-beads are mixed evenly and laid between two transparent conducting films coated with ITO, and rolled evenly to form a membranous layer; the bright spots of isotropic liquid are irradiated with 365nm UV-lights under a temperature within 0.5 to 3 DEG C to achieve a PDLC film. The invention is capable to improve the driving voltage of PDLC materials, increase the mesh strength of polymers; as a result, the electro-optical stability of PDLC film is improved.

Description

technical field [0001] The invention belongs to the application field of liquid crystal materials, in particular to a preparation method of a polymer dispersed liquid crystal film. Background technique [0002] Polymer dispersed liquid crystals (Polymer dispersed liquid crystals, referred to as PDLC) film is a liquid crystal / polymer composite electro-optic material. PDLC film can be applied in the field of electronically controlled dimming glass and flexible liquid crystal display, and the PDLC film can be switched between transparent and opaque states by adjusting the external electric field. PDLC film is an optical film formed by uniformly dispersing nematic liquid crystal droplets in a polymer matrix. PDLC film is a new type of liquid crystal functional material, which has good electro-optic properties, including low threshold voltage and saturation voltage, fast response time and high contrast, and can be cheaply made into various shapes and thicknesses film. When no ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/00C08L33/04C08J5/18
Inventor 张国良姜树改
Owner JIANGSU SENRAN CHEM
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