Reverse type electric-control liquid-crystal light adjusting film and preparation method thereof

A liquid crystal dimming film, liquid crystal technology, applied in nonlinear optics, optics, instruments, etc., can solve the problems of poor adhesion, poor film stability, etc.

Active Publication Date: 2017-02-15
北京智晶时代科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the shortcomings of the poor adhesion between the two substrates of the trans electronically controlled dimming film and the poor stability of the film, the present invention provides a trans Electronically controlled dimming film and preparation method thereof

Method used

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  • Reverse type electric-control liquid-crystal light adjusting film and preparation method thereof
  • Reverse type electric-control liquid-crystal light adjusting film and preparation method thereof
  • Reverse type electric-control liquid-crystal light adjusting film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1: The proportioning ratio of selected liquid crystals, polymerizable monomers, initiators, and spacer particles is listed in Table 2. Mix the components in Table 2 according to the ratio, and stir at room temperature to form an isotropic liquid, and mix well. The total mass of the mixture is 100 mg.

[0052] Table 2. The proportioning of each material used in embodiment 1

[0053] name Proportion / % Positive liquid crystal SLC1717 69.0 polymerizable monomer 30.0 Initiator 0.5 20um spacer particles 0.5

[0054] Step 2: apply the above solution on the middle of two plastic films with a size of 50mm*50mm coated with indium tin oxide (ITO) transparent conductive film, and use a roller to press evenly to form a film. The film is irradiated by ultraviolet light with a wavelength of 365nm at room temperature, and the ultraviolet light intensity is 0.5mw / cm 2 , the illumination time is 90s, and then the film is made into an upper ...

Embodiment 2

[0058] Step 1: The selected liquid crystals, polymerizable monomers, initiators, and spacer particles are listed in Table 3. Mix the components in Table 3 according to the ratio, and stir at room temperature to form an isotropic liquid, and mix well. The total mass of the mixture is 100mg.

[0059] Table 3. The proportioning of each material used in embodiment 2

[0060] name Proportion / % Positive liquid crystal E7 69.0 polymerizable monomer 30.0 Initiator 0.5 20um spacer particles 0.5

[0061] Step 2: apply the above solution on the middle of two plastic films with a size of 50mm*50mm coated with indium tin oxide (ITO) transparent conductive film, and use a roller to press evenly to form a film. The film is irradiated by ultraviolet light with a wavelength of 365nm at room temperature, and the ultraviolet light intensity is 0.5mw / cm 2 , the illumination time is 90s, and then the film is made into an upper electrode, a voltage of 50.0...

Embodiment 3

[0065] Step 1: The selected liquid crystals, polymerizable monomers, initiators, and spacer particles are listed in Table 4. Mix the components in Table 4 according to the ratio, and stir at room temperature to form an isotropic liquid, and mix well. The total mass of the mixture is 100mg. The molecular structure and proportioning ratio of each component of the positive liquid crystal with smectic phase to cholesteric phase transition used in this embodiment are shown in Table 4

[0066] Table 4. The proportioning of each material used in embodiment 3

[0067]

[0068]

[0069] Step 2: apply the above solution on the middle of two plastic films with a size of 50mm*50mm coated with indium tin oxide (ITO) transparent conductive film, and use a roller to press evenly to form a film. The film is irradiated by ultraviolet light with a wavelength of 365nm at room temperature, and the ultraviolet light intensity is 0.5mw / cm 2 , the illumination time is 90s, and then the film...

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Abstract

The invention discloses a reverse type electric-control liquid-crystal light adjusting film and a preparation method thereof. The liquid-crystal light adjusting film comprises a high-molecular network skeleton and nematic-phase liquid-crystal molecules, wherein the high-molecular network skeleton consists of polymer-dispersed liquid-crystal network structure and a polymer-stabilized liquid-crystal network structure; the high-molecular network skeleton comprises a high-molecular matrix containing mesh holes which are internally provided with vertically-arranged high-molecular networks; the nematic-phase liquid-crystal molecules are dispersed in the high-molecular network skeleton and are nematic-phase liquid-crystal molecules with negative dielectric anisotropy. The reverse type electric-control liquid-crystal light adjusting film and the preparation method disclosed by the invention have the advantages that the bonding strength between two substrates of the prepared reverse type electric-control liquid-crystal light adjusting film is higher 5N/cm<2>, and the driving voltage threshold of the liquid-crystal film is 5V-100V; the light transmittance of the film can be adjusted between 0.3% and 82% by adjusting the level of voltage.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of functional liquid crystal materials, and in particular relates to a trans-type electronically controlled liquid crystal dimming film and a preparation method thereof. Background technique [0002] Electronically controlled liquid crystal dimming film has been widely used in the field of controllable sunshade technology, indoor partitions, automobile doors and windows, etc. because of its light transmittance can be adjusted arbitrarily according to people's wishes. The optical film is mainly a polymer dispersed liquid crystal (PDLC) film. When the PDLC film does not apply an electric field, the directors of the liquid crystal molecules are randomly distributed, and the film is in a state of strong light scattering; under the action of an electric field, the long axis of the liquid crystal molecules is parallel to The electric field is aligned, and the film is transparent. PD...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334G02F1/1333
CPCG02F1/1333G02F1/1334G02F1/13345
Inventor 杨槐梁霄陈梅郭姝萌胡威张翠红张慧敏
Owner 北京智晶时代科技有限公司
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