Polymer-dispersed liquid crystal as well as preparation method and application

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 poor contrast of polymer dispersed liquid crystals, and achieve the effects of uniform size and distribution, good compatibility, and increased contrast

Inactive Publication Date: 2014-09-24
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor contrast of polymer-dispersed liquid crystals in the prior art, the present invention provides a polymer-dispersed liquid crystal and its preparation method and application

Method used

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  • Polymer-dispersed liquid crystal as well as preparation method and application
  • Polymer-dispersed liquid crystal as well as preparation method and application
  • Polymer-dispersed liquid crystal as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare distilled water, sodium polyacrylate and mixed solution, the weight ratio of which is 40:10:50. The mixed liquid is composed of liquid crystal and acrylate, and its weight ratio is 60:40. The degree of polymerization of sodium polyacrylate is 10-100, the liquid crystal is E44, and the acrylate is 2-methyl methacrylate.

[0027] The mixed solution is initially mixed with a magnetic stirrer or an ultrasonic stirrer, and the initial mixing time is 10 minutes to achieve a colloid-like transparent mixing state.

[0028] (2) In a water bath at 80°C or in an infrared environment, use a propeller to stir and disperse, add distilled water to the round bottom flask in turn, add sodium polyacrylate in two batches, increase the stirring speed, and wait until the sodium polyacrylate colloid reaches a stable state Then add the initial mixed liquid, stir thoroughly for 30 minutes, and evaporate part of the water to make the whole system into a viscous liquid mixture. At ...

Embodiment 2

[0033] (1) Prepare distilled water, sodium polyacrylate and mixed solution, the weight ratio of which is 30:20:50. The mixed liquid is composed of liquid crystal and acrylate, and its weight ratio is 60:40. The degree of polymerization of sodium polyacrylate is 10-100, the liquid crystal is E44, and the acrylate is polyurethane acrylate.

[0034] The mixed solution is initially mixed with a magnetic stirrer or an ultrasonic stirrer, and the initial mixing time is 10 minutes to achieve a colloid-like transparent mixing state.

[0035] (2) In a water bath at 80°C or in an infrared environment, use a propeller to stir and disperse, add distilled water to the round bottom flask in turn, add sodium polyacrylate in two batches, increase the stirring speed, and wait until the sodium polyacrylate colloid reaches a stable state Then add the initial mixed liquid, stir thoroughly for 30 minutes, and evaporate part of the water to make the whole system into a viscous liquid mixture. At ...

Embodiment 3

[0039](1) Prepare distilled water, sodium polyacrylate and mixed solution, the weight ratio of which is 30:10:60. The mixed liquid is composed of liquid crystal and acrylate, and its weight ratio is 50:50. The degree of polymerization of sodium polyacrylate is 10-100, the liquid crystal is E44, and the acrylate is polyurethane acrylate.

[0040] The mixed solution is initially mixed with a magnetic stirrer or an ultrasonic stirrer, and the initial mixing time is 10 minutes to achieve a colloid-like transparent mixing state.

[0041] (2) In a water bath at 80°C or in an infrared environment, use a propeller to stir and disperse, add distilled water to the round bottom flask in turn, add sodium polyacrylate in two batches, increase the stirring speed, and wait until the sodium polyacrylate colloid reaches a stable state Then add the initial mixed liquid, stir thoroughly for 30 minutes, and evaporate part of the water to make the whole system into a viscous liquid mixture. At t...

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Abstract

The invention relates to the technical field of liquid crystal display and discloses a polymer-dispersed liquid crystal as well as a preparation method and application thereof. The polymer-dispersed liquid crystal comprises liquid crystal and polyacrylate and further comprises sodium polyacrylate. The preparation method of the polymer-dispersed liquid crystal comprises the following steps: preferentially taking distilled water, sodium polyacrylate and a mixed solution at the weight ratio of 40:10:50, wherein the weight ratio of the liquid crystal and the acrylate in the mixed solution is 60:40; mixing the distilled water, the sodium polyacrylate and the mixed solution; and irradiating the mixture with ultraviolet light to solidify to form the polymer-dispersed liquid crystal. The invention also relates to the application of the polymer-dispersed liquid crystal to a liquid crystal display. The preparation method of the polymer-dispersed liquid crystal is easy to operate, the adopted raw materials are easily available, the preparation process is simple, and the prepared polymer-dispersed liquid crystal has high contrast.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a polymer dispersed liquid crystal and its preparation method and application. Background technique [0002] Polymer Dispersed Liquid Crystal (Polymer Dispersed Liquid Crystal, referred to as PDLC) is to use prepolymer monomers and liquid crystals to blend and then polymerize to realize the combination of the two. Through the dielectric anisotropy of liquid crystals, it can achieve bright light in the electrified state. dark state and power-off state. PDLC generally uses photopolymerization to polymerize prepolymer monomers to form a crosslinked network structure. [0003] In the prior art, before PDLC is polymerized, primary mixing is used to initially mix the liquid crystal and the polymer monomer. Since the liquid crystal molecule has a rod-like rigid structure and the polymer monomer has a flexible structure, the compatibility between the two is generally rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/52G02F1/1334
Inventor 王新星柳在健
Owner BOE TECH GRP CO LTD
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