Flexible liquid crystal thin film material having transmittance varying with temperature and film preparation method

A technology of flexible liquid crystal and thin film materials, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of energy saving and consumption, and achieve the effects of wide application fields, high contrast, and convenient transportation and installation

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

[0003] Intelligent electronically controlled glass has the characteristics of energy saving and intelligence, but this kind of glass needs to be in a certain electric field to maintain a transparent state, which requires additional energy consumption and does not achieve full energy saving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The mass fraction is 5% of 9CB, 15% of 10CB, 5% of 11CB, 15% of 12CB, 12% of chiral compound S811, 8% of liquid crystal polymerizable monomer C6M, 30% of nematic liquid crystal SLC1717, 2% isobornyl methacrylate, 2% -β-hydroxypropyl methacrylate, 5% 3,5,5-trimethylhexyl acrylate, 0.3% photoinitiator benzoin dimethicone ether, 0.7% in 15 micron glass beads at 40 o C. Mix and stir for 20 minutes under constant temperature conditions. After mixing evenly, pour it into the middle of two layers of polyester films coated with ITO conductive layers. Strength is 0.3W / cm 2 , the polymerization temperature is 15 o C, the polymerization time is 15 minutes, and a flexible liquid crystal film whose transmittance varies with temperature is prepared.

[0028] The prepared liquid crystal thin film is lower than 28 o It is transparent at C, and the temperature is higher than 28 o At C, the color of the film changes to a milky white light scattering state, from transparent to opaque...

Embodiment 2

[0030] The mass fraction is 5% of 8CB, 5% of 8OCB, 10% of 12CB, 10% of 16CB, 10% of chiral compound S811, 10% of liquid crystal polymerizable monomer C6M, 29% of nematic liquid crystal SLC1717, 3% isobornyl methacrylate, 3% -β-hydroxypropyl methacrylate, 4% 3,5,5-trimethylhexyl acrylate, 0.4% photoinitiator benzoin dimethicone Ether, 0.6% of 20 micron glass beads at 50 o C. Mix and stir for 20 minutes at a constant temperature. After mixing evenly, pour it into the middle of two layers of polyester films coated with ITO conductive layers. Strength is 0.5W / cm 2 , the polymerization temperature is 20 o C, the polymerization time is 15 minutes, and a flexible liquid crystal film whose transmittance varies with temperature is prepared.

[0031] The prepared liquid crystal thin film is lower than 35 o It is transparent at C, and the temperature is higher than 35 o During C, the milky white light-scattering state of film change color changes from transparent to opaque, and the ...

Embodiment 3

[0033] The mass fraction is 10% of 8CB, 10% of 8OCB, 10% of 9CB, 5% of 9OCB, 15% of chiral compound S811, 10% of liquid crystal polymerizable monomer C6M, 26% of nematic liquid crystal SLC7011 , 4% isobornyl methacrylate, 3% -β-hydroxypropyl methacrylate, 6% 3,5,5-trimethylhexyl acrylate, 0.3% photoinitiator benzoin dimethyl ether , 0.7% of 20 micron glass beads at 40 o C. Mix and stir for 20 minutes at a constant temperature. After mixing evenly, pour it into the middle of two layers of polyester films coated with ITO conductive layers. Strength is 0.5W / cm 2 , the polymerization temperature is 15 o C, the polymerization time is 10 minutes, and a flexible liquid crystal film whose transmittance varies with temperature is prepared.

[0034] The prepared liquid crystal thin film is lower than 32 o It is transparent at C, and the temperature is higher than 28 o During C, the film changes color to milky white light scattering state, and changes from transparent to opaque, and...

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Abstract

Disclosed are a flexible liquid crystal thin film material having the transmittance varying with the temperature and a film preparation method. Nematic liquid crystal, a chiral compound, biphenyl cyanogen liquid crystal, a liquid crystal polymerizable monomer, an acrylate monomer, glass beads, and an initiator are mixed according to a certain ratio and are uniformly stirred at 20-50 DEG C, the obtained mixture is poured into the middle part between two layers of polyester films coated with ITO conducting layers, the obtained film is subjected to rubber roll extrusion, and the obtained liquid crystal film is subjected to ultraviolet light polymerization in a power-on state so as to obtain a flexible liquid crystal thin film having the transmittance varying with the temperature. The prepared flexible liquid crystal thin film is transparent at a low temperature, the transmittance of the film increases as the temperature rises, and when the temperature reaches a certain value, the thin films converts to a transmittance state from the transparent state. The thin film has the characteristics of high response speed, high contrast and high infrared light and ultraviolet light resisting rate, can be applied to the fields of buildings and automobiles, and is an excellent energy-saving material. The film preparation method plays a significant part in promotion of development process of a thin-film material.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal applications, and in particular relates to a flexible liquid crystal film material whose transmittance changes with temperature and a film preparation method. Background technique [0002] Industrial energy consumption, transportation energy consumption and building energy consumption are the three main components of international energy consumption, especially building energy consumption is showing a sharp upward trend with the continuous increase of the total construction volume and the improvement of living comfort. At present, my country's Energy consumption has accounted for 13.6% of the world's total energy consumption. Therefore, the development of green energy-saving materials is not only closely related to the improvement of people's living standards, but also related to the implementation of national energy strategies and resource conservation strategies, as well as global climate c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F246/00C08F2/48C08F2/44C08K7/20C09K19/54
CPCC08F246/00C08F2/44C08F2/48C08K7/20C09K19/542
Inventor 苗宗成赵玉真李克轩丁思懿田少鹏王博
Owner XIJING UNIV
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