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Trans electronic control liquid crystal light dimming film and preparation method thereof

A liquid crystal dimming film and electronic control technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of poor film stability, poor adhesion, difficult to prepare large-area thin films, etc., to achieve thin film, improve The effect of bond strength

Inactive Publication Date: 2017-06-23
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the shortcomings of the poor adhesion between the two substrates of the trans-type electronically controlled liquid crystal dimming film, the poor stability of the film, and the difficulty in preparing a large-area film, the invention provides a polymer dispersed liquid crystal network system and a polymer Trans electronically controlled liquid crystal dimming film with coexistence of stable liquid crystal network system and preparation method thereof

Method used

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  • Trans electronic control liquid crystal light dimming film and preparation method thereof
  • Trans electronic control liquid crystal light dimming film and preparation method thereof
  • Trans electronic control liquid crystal light dimming film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 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 80 g.

[0043] Table 2. The proportioning of each material used in embodiment 1

[0044] name Proportion (wt%) HEF951800-100 60.0 polymerizable monomer 39.0 Initiator 0.5 20μm spaced particles 0.5

[0045] Step 2: The above solution is sandwiched between two plastic films coated with indium tin oxide (ITO) transparent conductive film by means of roll-to-roll processing 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, then the film is made into the upper electrode, 50.0Hz, 170v voltage is applied,...

Embodiment 2

[0050] 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 80 g.

[0051] Table 3. The proportioning of each material used in embodiment 2

[0052] name Proportion (wt%) DP002-122 72.0 polymerizable monomer 27.0 Initiator 0.5 20μm spaced particles 0.5

[0053] Step 2: The above solution is sandwiched between two plastic films coated with indium tin oxide (ITO) transparent conductive film by means of roll-to-roll processing 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, then the film is made into the upper electrode, 50.0Hz, 170v voltage is applied, and irradiated with 365nm...

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Abstract

The invention discloses a trans electronic control liquid crystal light dimming film and a preparation method thereof. The liquid crystal light dimming film comprises a macromolecular network skeleton and double-frequency nematic-phase liquid crystal molecules, a polymer dispersed liquid crystal network structure and a polymer stabilized liquid crystal network structure coexist in the macromolecular network skeleton, and the structures particularly comprise macromolecular matrixes containing meshes and macromolecular networks which are perpendicularly arranged in the meshes; the double-frequency nematic-phase liquid crystal molecules are dispersed in the macromolecular network skeleton. According to the trans electronic control liquid crystal light dimming film, the PD-SLC network structure is constructed between two substrates by adopting a stepped polymerization method, the bonding strength between the two substrates is greatly improved and is higher than 8.2 N / cm<2>, and when a voltage is applied to the film at the frequency higher than the liquid crystal material crossover frequency, the state of the film can be changed from a transparent state to a light scattering state; the light transmittance of the film can be adjusted from 0.3% to 82% by adjusting the size of the 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] With the advancement of technology, future optoelectronic materials based on liquid crystal (LC) materials are gradually developing towards thin-film products that are cheap, lightweight, especially flexible and easy to produce in large areas. Based on this development, LC / polymer composite film materials came into being. The purpose of constructing this composite material system is to combine the response characteristics of LC molecules with the good mechanical strength, excellent flexibility and excellent processing characteristics of polymer materials, so that while realizing the external field response performance of LC, The roll-to-roll processing method can be used to realiz...

Claims

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Application Information

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IPC IPC(8): G02F1/1334C08F20/28C08F20/18C08F22/14C08F22/20C08F2/48
CPCC08F2/48C08F20/18C08F20/28C08F22/14C08F22/20G02F1/1334G02F1/13345
Inventor 杨槐梁霄陈梅郭姝萌张兰英李春昕
Owner PEKING UNIV
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