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Spectral selective reflection liquid crystal film and preparation method thereof

A technology of liquid crystal thin film and spectrum selection, applied in liquid crystal materials, chemical instruments and methods, coatings, etc.

Active Publication Date: 2021-06-29
智谱纳米科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a spectrally selective reflective liquid crystal film and its preparation method, which solves the problem of how to change the helical pitch by changing the liquid crystal ratio, thereby realizing the selectivity of the liquid crystal film to the spectrum

Method used

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  • Spectral selective reflection liquid crystal film and preparation method thereof
  • Spectral selective reflection liquid crystal film and preparation method thereof
  • Spectral selective reflection liquid crystal film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of the spectrum selective reflection liquid crystal film is as follows:

[0029] S1. Prepare mixed paint: 4.0% chiral liquid crystal molecules A, 10% nematic liquid crystal molecules B, 15% nematic liquid crystal molecules C, 31% nematic liquid crystal molecules D, 40% nematic liquid crystal molecules E According to the proportion, it is added to the polyurethane-modified acrylic resin with 3 times the quality of cholesteric liquid crystal and 6 times the quality of cholesteric liquid crystal, and in the mixed solution composed of butanone:isophorone=6:4 mixed solvent, fully Stir until the liquid crystal molecules are completely dissolved, and the whole system becomes light yellow with a certain viscosity, then sealed and stored until a film is formed;

[0030] S2. Coating: Apply the thermosetting coating prepared in S1 evenly on the ordinary PET film with a 30 μm wire rod,

[0031] S3. Thermal curing: After coating, place it in an environment of...

Embodiment 2

[0033] The preparation method of the spectrum selective reflection liquid crystal film is as follows:

[0034] S1. Prepare mixed paint: 4.3% chiral liquid crystal molecules A, 15% nematic liquid crystal molecules B, 12.7% nematic liquid crystal molecules C, 38% nematic liquid crystal molecules D, 30% nematic liquid crystal molecules E According to the proportion, it is added to the polyurethane-modified acrylic resin with 4 times the quality of cholesteric liquid crystal and 8 times the quality of cholesteric liquid crystal, and in the mixed solution composed of ethyl acetate:isophorone=5:5 mixed solvent, fully Stir until the liquid crystal molecules are completely dissolved, and the whole system becomes light yellow with a certain viscosity, then sealed and stored until a film is formed;

[0035] S2. Coating: Apply the thermosetting coating prepared in S1 evenly on the ordinary PET film with a 50 μm wire rod;

[0036] S3. Thermal curing: After coating, put it in an environme...

Embodiment 3

[0038] The preparation method of the spectrum selective reflection liquid crystal film is as follows:

[0039] S1. Prepare mixed paint: 4.6% chiral liquid crystal molecules A, 15% nematic liquid crystal molecules B, 12.4% nematic liquid crystal molecules C, 35% nematic liquid crystal molecules D, 33% nematic liquid crystal molecules E Add 4 times the mass of cholesteric liquid crystal polyurethane-modified acrylic resin and 8 times the mass of cholesteric liquid crystal in proportion, and consist of dimethyl carbonate: butyl acetate: isophorone = 4:2:4 mixed solvent In the mixed solution formed, fully stir until the liquid crystal molecules are completely dissolved, and the whole system becomes light yellow with a certain viscosity, and then sealed and stored until a film is formed;

[0040] S2. Coating: apply the thermosetting coating prepared in S1 evenly on the PET film with polyurethane primer with a 20 μm wire rod;

[0041] S3. Thermal curing: after coating, put it in an...

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Abstract

The invention discloses a spectrum selective reflection liquid crystal film and a preparation method thereof, and belongs to the technical field of optical film materials. It includes cholesteric liquid crystal, modified acrylic resin, and organic solvent. The invention obtains a colorless and transparent film in the ultraviolet and infrared light regions, which can reflect ultraviolet and infrared rays to achieve a certain degree of ultraviolet and heat insulation effects; in the visible light region, different helical pitches and different reflection wavelengths can be formed. Corresponds to different colors, and will form a contrasting color on a black and white background, so it will have a colorful effect. The reflective film near 430 nm can be used as an anti-blue light product, and the reflective film near 560 nm can be used as an anti-blue light product. Dizzy products.

Description

technical field [0001] The invention relates to a spectrally selective reflective liquid crystal film and a preparation method thereof, belonging to the technical field of optical film materials. Background technique [0002] Liquid crystal is a special fluid with ordered orientation and disordered position between isotropic liquid and crystal with certain order. Therefore, liquid crystal not only retains the fluidity of liquid, but also has the characteristics of crystal. Anisotropic features such as birefringence. This characteristic and special structure gives it crystal anisotropy, such as optical, dielectric and dielectric anisotropy. The liquid crystal molecules are arranged parallel to each other to form a layered structure relying on the effect of the end groups. The long axes of the molecules are arranged in parallel in each plane layer, and the long axes of the molecules are gradually deflected between layers to form a spiral. Due to the relative freedom between ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D7/63C08J7/04C09K19/46C08L67/02
CPCC08J7/042C08J2367/02C08J2433/04C08K2201/014C09D133/04C09K19/46C09D7/63C08K5/00C08K5/1535C08K5/101C08K5/315C08K5/103
Inventor 毛耀全李曼郑克金李方园宋亚
Owner 智谱纳米科技(上海)有限公司