Polymer dispersed liquid crystal film prepared by using photomask and preparation method thereof

A technology for dispersing liquid crystals and polymers, used in chemical instruments and methods, optics, layered products, etc., can solve the problems of high driving voltage, slow response time, and poor mechanical properties of PDLC films, and achieve faster polymerization rate and response. Increased contrast and brightness, excellent mechanical properties

Pending Publication Date: 2021-06-25
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, PDLC films still have defects such as high driving voltage, low contrast, slow response time, and poor mechanical properties, which limit their wide-scale application in display.

Method used

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  • Polymer dispersed liquid crystal film prepared by using photomask and preparation method thereof
  • Polymer dispersed liquid crystal film prepared by using photomask and preparation method thereof
  • Polymer dispersed liquid crystal film prepared by using photomask and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]A polymer-dispersed liquid crystal film prepared by using a photomask, the first layer from top to bottom is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the lower side, and the second layer is a thin layer of polymer liquid crystal composite system , the third layer is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the upper side. The conductive layer is a silver nanowire / poly(3-hexylthiophene) composite conductive material with a resistivity of 10Ω / cm, a light transmittance of 85%, and a thickness of 10nm.

[0039] The polymer liquid crystal composite thin layer is made of the following raw materials by weight: 1 part of nematic liquid crystal, 1 part of polymerizable monomer mixture, 0.2 part of photoinitiator mixture, and 0.1 part of ultraviolet absorber mixture.

[0040] The thickness of the thin layer of the polymer liquid crystal composite system is 20 μm. ...

Embodiment 2

[0055] A polymer-dispersed liquid crystal film prepared by using a photomask, the first layer from top to bottom is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the lower side, and the second layer is a thin layer of polymer liquid crystal composite system , the third layer is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the upper side.

[0056] The conductive layer is a silver nanowire / poly(3-hexylthiophene) composite conductive material with a resistivity of 800Ω / cm, a light transmittance of 95%, and a thickness of 30nm.

[0057] The polymer liquid crystal composite thin layer is made of the following raw materials by weight: 50 parts of nematic liquid crystal, 50 parts of polymerizable monomer mixture, 5.0 parts of photoinitiator mixture, and 1.5 parts of ultraviolet absorber mixture.

[0058] The thickness of the thin layer of the polymer liquid crystal composite s...

Embodiment 3

[0073] A polymer-dispersed liquid crystal film prepared by using a photomask, the first layer from top to bottom is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the lower side, and the second layer is a thin layer of polymer liquid crystal composite system , the third layer is a biaxially stretched polyester transparent conductive thin layer coated with a conductive layer on the upper side. The conductive layer is a silver nanowire / poly(3-hexylthiophene) composite conductive material with a resistivity of 400Ω / cm, a light transmittance of 90%, and a thickness of 20nm.

[0074] The polymer liquid crystal composite thin layer is made of the following raw materials by weight: 25 parts of nematic liquid crystal, 25 parts of polymerizable monomer mixture, 2.50 parts of photoinitiator mixture, and 0.8 part of ultraviolet absorber mixture.

[0075] The thickness of the thin layer of the polymer liquid crystal composite system is ...

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Abstract

The invention provides a polymer dispersed liquid crystal thin film prepared by using a photomask. From top to bottom, a first layer is a biaxially oriented polyester transparent conductive thin layer of which the lower side is plated with a conductive layer, a second layer is a polymer liquid crystal composite system thin layer, and a third layer is a biaxially oriented polyester transparent conductive thin layer of which the upper side is plated with a conductive layer; when the liquid crystal thin film is manufactured, a photomask is placed on the thin film and irradiated by an ultraviolet lamp, then the photomask is removed and irradiated by the ultraviolet lamp, and the polymer dispersed liquid crystal thin film is manufactured. The middle layer is a liquid crystal composite system thin layer added with an ultraviolet light absorber and two characteristic absorption wavelength photoinitiators, and then ultraviolet polymerization according to wavelengths and steps is realized through a photomask, so that the polymer dispersed liquid crystal thin film which is lower in raw material cost and dosage, more excellent in photoelectric property and better in comprehensive performance is prepared; and a new thought and precious experience are provided for production and development of the polymer dispersed liquid crystal film.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a polymer-dispersed liquid crystal film prepared by using a photomask and a preparation method thereof. Background technique [0002] In recent years, liquid crystal display technology has developed rapidly, and various liquid crystal display devices have been widely used in all aspects of life. Polymer-dispersed liquid crystal (PDLC) films have attracted attention due to their unique property of electrically controllable switching, consisting of micro- or nano-scale liquid crystal (LC) droplets embedded in a polymer matrix. Typically, these films exhibit a milky scattering state due to the random orientation of LC droplets in the polymer matrix. Once an electric field of sufficient strength is applied, and the ordinary refractive index n of the LC o and polymer refractive index n p When matched, the film becomes transparent. In recent decades, driv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/36B32B33/00G02F1/1334C08J7/044C08J7/04C08J7/06C08L67/02C08F222/14C08F220/32C08F226/06
CPCB32B27/06B32B27/36B32B33/00G02F1/1334C08J7/044C08J7/0423C08J7/06C08F222/102C08J2367/02C08J2465/00C08F222/104C08F220/32C08F226/06
Inventor 王冬陈先亮赵玉真苗宗成贺泽民张慧敏赵阳
Owner XIJING UNIV
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