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Preparation method of electrochromic liquid crystal thin film material

An electrochromic and liquid crystal thin film technology, which is applied in the direction of liquid crystal materials, color-changing fluorescent materials, chemical instruments and methods, etc., can solve problems such as not easy to bend, poor film-forming property, and difficult production, and achieve easy processing, good film-forming property, The effect of increasing compatibility

Inactive Publication Date: 2017-03-29
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although there are many types of electrochromic thin film materials, there are disadvantages such as poor film formation, difficulty in large-area production, not easy to bend, high cost, and poor stability.

Method used

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  • Preparation method of electrochromic liquid crystal thin film material
  • Preparation method of electrochromic liquid crystal thin film material
  • Preparation method of electrochromic liquid crystal thin film material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation method of an electrochromic liquid crystal film, the specific steps are as follows:

[0025] Step 1: Weigh viologen compounds, nematic liquid crystals, ultraviolet polymerizable monomers, spacer particles and photoinitiators according to the mass fraction of 3%: 80%: 15%: 1.5%: 0.5%, respectively;

[0026] Step 2: mixing the viologen compound, nematic liquid crystal, ultraviolet polymerizable monomer and spacer in step 1, and stirring evenly to obtain a mixture;

[0027] Step 3: Add the photoinitiator in Step 1 to the mixture in Step 2, and stir evenly to obtain the light-introducing mixture;

[0028] Step 4: Pour the light-absorbing mixture obtained in Step 3 between the polyester films coated with a conductive layer, squeeze it with a roller, and then put it under a light intensity of 3mw / cm 2 Radiation polymerization was carried out under ultraviolet light for 15 minutes to obtain a flexible electrochromic liquid crystal film material.

Embodiment 2

[0030] A preparation method of an electrochromic liquid crystal film, the specific steps are as follows:

[0031] Step 1: Weigh viologen compounds, nematic liquid crystals, ultraviolet polymerizable monomers, spacer particles and photoinitiators according to the mass fraction of 4%: 79%: 15%: 1%: 1%, respectively;

[0032] Step 2: mixing the viologen compound, nematic liquid crystal, ultraviolet polymerizable monomer and spacer in step 1, and stirring evenly to obtain a mixture;

[0033] Step 3: Add the photoinitiator in Step 1 to the mixture in Step 2, and stir evenly to obtain the light-introducing mixture;

[0034] Step 4: Pour the light-absorbing mixture obtained in Step 3 between the polyester films coated with a conductive layer, squeeze it with a roller, and then place it under a light intensity of 1.5mw / cm 2 Radiation polymerization was carried out under ultraviolet light for 20 minutes to obtain a flexible electrochromic liquid crystal film material.

Embodiment 3

[0036] A preparation method of an electrochromic liquid crystal film, the specific steps are as follows:

[0037] Step 1: Weigh viologen compounds, nematic liquid crystals, ultraviolet polymerizable monomers, spacer particles and photoinitiators according to the mass fraction of 8%: 75%: 10%: 5%: 2%, respectively;

[0038] Step 2: mixing the viologen compound, nematic liquid crystal, ultraviolet polymerizable monomer and spacer in step 1, and stirring evenly to obtain a mixture;

[0039] Step 3: Add the photoinitiator in Step 1 to the mixture in Step 2, and stir evenly to obtain the light-introducing mixture;

[0040] Step 4: Pour the light-absorbing mixture obtained in step 3 between the polyester films coated with a conductive layer, squeeze it with a roller, and then put it under a light intensity of 5mw / cm 2 Radiation polymerization was carried out under ultraviolet light for 10 minutes to obtain a flexible electrochromic liquid crystal film material.

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Abstract

The invention provides a preparation method of an electrochromic liquid crystal thin film material. The method comprises the following steps: 1-10% of viologen liquid crystal compounds with electrochromic performance, 40-80% of nematic liquid crystal, 5-30% of a UV polymerisable monomer, 0.1-10% of spacer particles, and 0.1-10% of a photoinitiator are mixed, in order to obtain a photo initiating mixture; the mixture is poured into two layers of polyester films coated with conducting layers, a roll shaft is used for extruding, polymerization is carried out with ultraviolet light irradiation, in order to obtain the flexible electrochromic liquid crystal thin film material. The method can be used for large-area production, and has the advantages of simple technology, stabilization, flexibility, and low cost.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal application, and in particular relates to a preparation method of an electrochromic liquid crystal film. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials, such as reflectivity, transmittance, and absorptivity, undergo stable and reversible color changes under the action of an external electric field, and appear as reversible changes in color and transparency in appearance. Materials with electrochromic properties are called electrochromic materials, and devices made of electrochromic materials are called electrochromic devices. [0003] Electrochromic materials are classified into inorganic electrochromic materials and organic electrochromic materials. A typical representative of inorganic electrochromic materials is tungsten trioxide. At present, electrochromic devices using tungsten trioxide as functional materials have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/52C09K9/02
CPCC09K19/52C09K9/02C09K2211/1029
Inventor 赵玉真苗宗成李克轩贺泽民赵阳
Owner XIJING UNIV
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