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Color polymer dispersed liquid crystal thin film and preparation method thereof

A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve problems such as single color and limited use, and achieve bright dyeing, high contrast, and beautiful visual effects

Pending Publication Date: 2018-02-16
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the industrialized PDLC films are now white, and their use is still partially limited due to their single color.

Method used

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  • Color polymer dispersed liquid crystal thin film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Nematic liquid crystal E7, polythiol compound (T-35) and bisphenol A epoxy resin (E-51) are selected, the mass ratio of the two thermally polymerizable monomers is 1:1, and the liquid crystal and polymerizable monomer The mass ratio is 4:6. Select an oil-soluble azo-type blue dye, which accounts for 1% of the total mass of the liquid crystal and polymerized monomers, mix the dye and the liquid crystal evenly at room temperature, and then add bisphenol A epoxy resin and stir. Then, spacer particles with a diameter of 20 microns are selected and added to the stirring system, and the spacer particles account for 0.5% of the total mass of the liquid crystal and the polymerized monomer. Then add polythiol compound, add curing agent after stirring for 5 minutes, curing agent accounts for 2% of the total mass of polymerized monomers. After stirring for 3 minutes, the mixture is sandwiched between two layers of polyester conductive films coated with indium tin oxide, and Extru...

Embodiment 2

[0017] Nematic liquid crystal slc1717, polythiol compound (T-35) and bisphenol A epoxy resin (E-51) are selected, the mass ratio of the two thermally polymerizable monomers is 1:1.2, and the liquid crystal and polymerizable monomer The mass ratio is 9:11. Choose an oil-soluble anthraquinone red dye, accounting for 1.5% of the total mass of the liquid crystal and polymerized monomers, mix the dye and the liquid crystal evenly at room temperature, and then add bisphenol A epoxy resin and stir. Then, spacer particles with a diameter of 15 microns are selected and added to the stirring system, and the spacer particles account for 0.5% of the total mass of liquid crystal and polymerized monomers. Then add polythiol compound, add curing agent after stirring for 4 minutes, curing agent accounts for 5% of the total mass of polymerized monomers, stir for 3 minutes and then sandwich the mixture between two layers of polyester conductive films coated with indium tin oxide, use Extrude w...

Embodiment 3

[0019] Nematic liquid crystal slc7011, polythiol compound (T-35) and bisphenol A epoxy resin (E-54) are selected, the mass ratio of the two thermally polymerizable monomers is 1:1, and the liquid crystal and polymerizable monomer The mass ratio is 1:1. Choose an oil-soluble azo-type yellow dye, which accounts for 2% of the total mass of the liquid crystal and polymerized monomers, mix the dye and the liquid crystal evenly at room temperature, and then add bisphenol A epoxy resin and stir. Then, spacer particles with a diameter of 25 microns are selected and added to the stirring system, and the spacer particles account for 0.6% of the total mass of liquid crystals and polymerized monomers. Then add a polythiol compound, stir for 5 minutes and then add a curing agent, the curing agent accounts for 7% of the total mass of the polymerized monomers. After stirring for 3 minutes, the mixture was sandwiched between two layers of polyester conductive films coated with indium tin oxi...

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Abstract

A color polymer dispersed liquid crystal thin film material comprises, by mass, 100 parts of mixture, 1-10 parts of curing agent, 0.1-2 parts of spacers and 0.5-3 parts of dyes. The mixture comprises,by mass, 40-70% of thermal polymerization monomers and 30-60% of liquid crystals. The invention further discloses a preparation method of the material. The method includes the steps that the thermalpolymerization monomers, the nematic liquid crystals, the curing agent, the dyes and spacers are mixed in a certain ratio and uniformly stirred, and the mixture is sandwiched between two conductive thin films plated with indium tin oxide; after being extruded by a roller shaft, the mixture is put into a heat curing machine for curing to obtain the polymer dispersed liquid crystal thin film with the thickness of 10-30 micrometers. The polymer dispersed liquid crystal thin film material has the advantage that thin films prepared through the method are good in thermal stability and high in bonding force, the thin films in different colors can be prepared by means of different dyes, and the thin films are rich in color, good in visual effect and wide in application field.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and mainly relates to a colored polymer dispersed liquid crystal film and a preparation method thereof. Background technique [0002] Polymer dispersed liquid crystal film (PDLC) is a new type of liquid crystal functional film material. Its working principle is that when the incident light enters the PDLC film, the effective refractive index of the light passing through the liquid crystal droplet is greatly different from the refractive index passing through the polymer matrix. , the light is reflected and refracted multiple times on the interface between the liquid crystal and the polymer, and the PDLC film is in a strong scattering state; the liquid crystal molecules have optical anisotropy and dielectric anisotropy. When an electric field is applied on the PDLC film, the liquid crystal droplets point to The vector is oriented along the electric field. When the ordinary light r...

Claims

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Application Information

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IPC IPC(8): G02F1/1334G02F1/137C09K19/60
CPCC09K19/601C09K19/603G02F1/1334G02F1/13737G02F1/13775
Inventor 赵玉真任花萍朱敏马强赵阳杨周礼纪姗姗
Owner XIJING UNIV
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