Method for utilizing polymer stable liquid crystal material to prepare light brightness enhancement film

A technology for stabilizing liquid crystals and polymerizing liquid crystals, applied in optics, nonlinear optics, instruments, etc., can solve the problems of difficult synthetic methods of raw materials and expensive synthetic materials, and achieve optimized light reflection performance, little influence of light scattering, and uniform surface Effect

Inactive Publication Date: 2009-10-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The broadband reflective film they prepared can reflect the circularly polarized incident light in the entire visible wavelength ran

Method used

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  • Method for utilizing polymer stable liquid crystal material to prepare light brightness enhancement film
  • Method for utilizing polymer stable liquid crystal material to prepare light brightness enhancement film
  • Method for utilizing polymer stable liquid crystal material to prepare light brightness enhancement film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Production of the glass substrate: soak the glass substrate in potassium dichromate lotion for 1 hour, take out the glass substrate, wash it with distilled water, and dry it. Soak the other glass substrate in the aqueous solution of photopolymerizable siloxane for 1 minute, take out the glass substrate, wash it with distilled water, and heat it at 100°C for 1 hour, combine the above two glass substrates, and the thickness of the spacer is 20 μm to make a liquid crystal box.

[0019]

[0020] a) Mass ratio: nematic liquid crystal (SLC-1717) / chiral compound / C6M / photoinitiator

[0021] Pour sample 1 into a new liquid crystal cell after surface treatment, N * The phase liquid crystal maintains the planar texture, and the liquid crystal cell is irradiated with ultraviolet light, and the irradiation intensity is 30mW / cm 2 , and the irradiation time was 1 hour. After the irradiation, the surface treated with the potassium dichromate washing solution was peeled off from ...

Embodiment 2

[0023]

[0024] a) Mass ratio: nematic liquid crystal (SLC-1717) / chiral compound / C6M / photoinitiator

[0025] Manufacturing method is as embodiment 1, and the thickness of liquid crystal cell is 50 μ m, after the ultraviolet photopolymerization process identical with embodiment 1, promptly obtains the PSLC film material of embodiment 2, and reflection wavelength range is 400~550nm (such as figure 2 shown).

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Abstract

The invention belongs to the field of application of liquid crystal materials and provides a method for utilizing polymer stable liquid crystal material to prepare a light brightness enhancement film. The method comprises the following steps of: mixing nematic liquid crystals, chiral compounds, ultraviolet polymerizable liquid crystal monomers, ultraviolet polymerizable siloxane and photoinitiators uniformly according to a certain mass proportion, injecting the mixture into pretreated film materials combined by PSLC substrate, carrying out diffusion from the high-concentration substrate to the low-concentration substrate by the chiral compounds, generating chiral nematic liquid crystals with continuous and different screw pitches, carrying out ultraviolet radiation on the film material, leading the ultraviolet polymerizable liquid crystal monomer molecules to occur polymerization reaction, forming a high-molecular network, leading the planar texture of the liquid crystal molecules to be stabilized and finally obtaining the PSLC material with wide wave reflection characteristics. The film material can reflect circularly polarized light with the reflection wavelength of 300 to 1500nm and the range of the reflected wave width can be precisely controlled. According to the differences of the reflection wavebands, the film material can be applied to the field of light brightness enhancement films and infrared ultraviolet light screen films of liquid crystal displays and the like.

Description

technical field [0001] The invention belongs to the application field of liquid crystal materials, and provides a method for preparing a light brightness enhancement film by using polymer stabilized liquid crystal materials. The material can be widely used in the fields of optical brightness enhancement films of liquid crystal displays, infrared and ultraviolet light shielding films, and the like. Background technique [0002] Chiral nematic phase (N * ) Liquid crystals are formed by adding chiral compounds to nematic liquid crystals. The liquid crystal molecules are arranged in layers and lie flat in the layers along the long axis of the molecules parallel to the layer plane. The layers are parallel to the layers, and the molecules in the layers roughly point to In the same direction, the long-range orientation is ordered but there is no positional order. The orientation of the long axis of the liquid crystal molecules between adjacent layers rotates regularly by a certai...

Claims

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Application Information

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IPC IPC(8): G02F1/1333G02F1/1335C08F220/10
Inventor 杨槐郭仁炜曹晖刘会景何万里孟庆勇刘芳
Owner UNIV OF SCI & TECH BEIJING
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