Polymer dispersed liquid crystal three steady-state membrane 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 the inability to function as a switchable energy-saving window, and achieve the effect of increasing infrared light transmission

Inactive Publication Date: 2011-05-11
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the research on PDLC film, people have also obtained polymer dispersed cholesteric liquid crystal (PolymerDispersed Cholesteric Liquid Crystal, PDCLC) bistable film, which has Bragg reflection off state and transmission on state, Bragg selective reflection wavelength adjustment in The visible light band is not in the infrared light band, so it absorbs and transmits infrared light, and cannot function as a switchable energy-saving window

Method used

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  • Polymer dispersed liquid crystal three steady-state membrane and preparation method thereof
  • Polymer dispersed liquid crystal three steady-state membrane and preparation method thereof
  • Polymer dispersed liquid crystal three steady-state membrane and preparation method thereof

Examples

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Embodiment 1

[0032] A polymer dispersed liquid crystal tristable film, such as figure 1As shown, it includes two layers of flexible transparent conductive films 101, 105 and a polymer dispersed liquid crystal layer 103 arranged between the two layers of flexible transparent conductive films 101, 105, and the inner surface of the flexible transparent conductive film 101 is provided with a transparent conductive film Layer electrode 102, the inner surface of flexible transparent conductive film 105 is provided with transparent conductive thin-layer electrode 104, the thickness of polymer dispersed liquid crystal layer 103 is 30 μ m, the average diameter of the liquid crystal droplet 106 in polymer dispersed liquid crystal layer 103 is 3 ~5 μm; the polymer-dispersed liquid crystal layer 103 is mainly made of a prepolymer, a chiral dual-frequency liquid crystal material and a pad material, which are fully stirred and uniformly mixed, and the weight ratio of the prepolymer and the chiral dual-f...

Embodiment 2

[0039] The polymer-dispersed liquid crystal tristable film described in Preparation Example 1 is carried out in an ultra-clean workshop, and the preparation method mainly includes the following steps:

[0040] ①Weigh the prepolymer and chiral dual-frequency liquid crystal material according to the weight ratio of 1: (1~3), and weigh them at 1~10 pieces / mm 2 Add the content of the liner material, and fully stir and evenly mix the prepolymer, chiral dual-frequency liquid crystal material and liner material at room temperature; here, the prepolymer, chiral dual-frequency liquid crystal material and liner material can specifically be Match according to the actual situation.

[0041] The prepolymer is mainly composed of polymerizable monomers, chain transfer agents and photoinitiators. The weight percentage of each component is: 20% of polymerizable monomer propoxynonyl phenyl acrylate, 20% of polymerizable monomer trimethylol Propane triacrylate was 70%, chain transfer agent seba...

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Abstract

The invention discloses a polymer dispersed liquid crystal three steady-state membrane and a preparation method thereof. The polymer dispersed liquid crystal three steady-state membrane comprises two layers of flexible transparent conductive thin membranes and a polymer dispersed liquid crystal layer arranged between the flexible transparent conductive thin membranes. Transparent conductive thin membrane layer electrodes are arranged on the inner surfaces of the flexible transparent conductive thin membranes. The polymer dispersed liquid crystal layer is mainly prepared by mixing a prepolymer, a chiral double-frequency liquid crystal material and a gasket material uniformly and adequately; and therefore, the polymer dispersed liquid crystal membrane made of the polymer dispersed liquid crystal layer has the advantages of three steady states of scattering Off state, semi-transparent On state and visible light scattering and infrared Bragg reflection Off state.

Description

technical field [0001] The invention relates to a polymer dispersed liquid crystal film, in particular to a polymer dispersed liquid crystal tristable film and a preparation method thereof. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC) is a mixture of polymers, nematic liquid crystals and spacers in a certain ratio, sandwiched between two flexible transparent conductive films, and undergoes phase separation. Nematic liquid crystals are precipitated from the polymer to form liquid crystal droplets, and the polymer solidifies to wrap the liquid crystal droplets in it to form a composite film. When no electric field is applied to the composite film, since the refractive index of the polymer does not match the refractive index of the nematic liquid crystal, it will cause light scattering, and the composite film is off to light; when the composite film is applied with an electric field, the refractive index of the polymer Matching the refractive index of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1334C09K19/52
Inventor 陶卫东范志新潘雪丰王芬胡银灿
Owner NINGBO UNIV
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