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Thermochromic film as well as preparation method and application thereof

A thermochromic, first-chiral agent technology, applied in the field of liquid crystal materials, can solve the problems of inability to achieve full-spectrum color reversible change, complex and difficult production process, incomplete color restoration, etc., to achieve large-scale production and continuous The effect of simple production and preparation process and easy packaging

Active Publication Date: 2022-03-18
广州光驭超材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing liquid crystal color-changing materials generally have the problems of single color, incomplete color restoration, complicated and difficult production process, and poor packaging, and in the field of temperature-changing liquid crystals, it is impossible to achieve reversible changes in full-spectrum colors

Method used

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  • Thermochromic film as well as preparation method and application thereof
  • Thermochromic film as well as preparation method and application thereof
  • Thermochromic film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment provides a thermochromic film, the preparation method of which comprises the following steps:

[0029] Step A: uniformly mixing the liquid crystalline polymerizable monomer (RM257) and the chiral agent (S811) at a mass ratio of 7:3 to obtain a first liquid crystal mixture.

[0030] Step B: uniformly mixing the nematic liquid crystal (E7) and the chiral agent (S5011) at a mass ratio of 1:0.1 to obtain a second liquid crystal mixture.

[0031] Step C: adding a chiral agent (S1011) and a photoinitiator (907) to the first liquid crystal mixture and the second liquid crystal mixture and mixing to obtain a cholesteric phase-changing liquid crystal mixture, the first liquid crystal mixture, the second liquid crystal mixture, The mass ratio of the chiral agent (S1011) to the photoinitiator (907) is 0.459:0.450:0.128:0.024.

[0032] Step D: Coating the color-changing liquid crystal mixture between two transparent flexible PET substrate layers, extruding into a f...

Embodiment 2

[0035] This embodiment provides a thermochromic film, the preparation method of which is basically the same as that of Embodiment 1, except that the first liquid crystal mixture in step A is a liquid crystal polymerizable monomer (RM257) and a chiral agent (S1011). The mass ratio is 1:0.1. The liquid crystalline polymerizable monomer (RM257) and the chiral agent (S1011) of this ratio can adjust the cholesteric liquid crystal with the same color as that of Example 1, and the thermochromic performance of the obtained thermochromic film is basically the same as that of Example 1. same.

Embodiment 3

[0037] This embodiment provides a thermochromic film, the preparation method of which is basically the same as that of Example 1, except that the first liquid crystal mixture in step A is a liquid crystal polymerizable monomer (RM257) and a chiral agent (S811 and S1011) , the mass ratio RM257:S811:S1011 mass ratio is 0.6:0.03:0.07. The liquid crystalline polymerizable monomer (RM257) and chiral agent (S811 and S1011) of this ratio can adjust the cholesteric liquid crystal with the same color as in Example 1, and the thermochromic performance of the obtained thermochromic film is the same as that in Example 1. 1 is basically the same.

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Abstract

The invention relates to a thermochromic film and a preparation method and application thereof. The thermochromic film comprises a thermochromic liquid crystal layer arranged between two transparent flexible base material layers, the thermochromic liquid crystal layer is prepared by mixing and at least partially curing raw materials including a first liquid crystal mixture, a second liquid crystal mixture, a third chiral agent and a photoinitiator; the first liquid crystal mixture comprises a liquid crystal polymerizable monomer and a first chiral agent in a mass ratio of (1-10): 1; the second liquid crystal mixture comprises nematic liquid crystal and a second chiral agent in a mass ratio of 1: (0.1-0.65); the mass ratio of the first liquid crystal mixture to the second liquid crystal mixture is 1: (0.98-1). The thermochromic film is controllable in color, and has the advantages of quick response, wide color gamut and the like. The thermochromic film is extruded into a film through a composite coating process, the preparation is simple, and large-scale continuous production can be realized. The thermochromic film can be applied to the fields of liquid crystal display, intelligent glass or anti-counterfeiting.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a thermochromic film and its preparation method and application. Background technique [0002] Liquid crystal is a state of matter between the liquid state and the crystalline state. It has both the fluidity of the liquid and the anisotropy of the crystal. The different arrangement and orientation of the liquid crystal molecules under different conditions can be used to realize the color change of the material. Existing liquid crystal color-changing materials generally have the problems of single color, incomplete color restoration, complicated and difficult production process, and poor packaging. Moreover, in the field of temperature-changing liquid crystals, reversible changes in full-spectrum colors cannot be achieved. Contents of the invention [0003] In view of the deficiencies in the prior art, the first object of the present invention is to provide a th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B33/00B32B27/08B32B27/36B32B37/00C09K19/50B05D5/06B05D7/04
CPCB32B33/00B32B27/08B32B27/36B32B37/00C09K19/50B05D5/065B05D7/04B32B2037/243B32B2307/402B32B2457/202B32B2519/00B32B2255/10B32B2255/26
Inventor 田丰
Owner 广州光驭超材料有限公司