Method for preparing intelligent photomasking film material

A thin film material, light shielding technology, applied in optics, nonlinear optics, instruments, etc., can solve the problem of not realizing energy saving, and achieve the effect of energy saving and indoor temperature improvement

Active Publication Date: 2006-05-24
大连知行科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although electronically controlled smart glass has the characteristics of energy saving and intelligence, it needs to apply a continuous electric field in the transparent state, which requires additional energy consumption, and has n

Method used

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  • Method for preparing intelligent photomasking film material
  • Method for preparing intelligent photomasking film material
  • Method for preparing intelligent photomasking film material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] The liquid crystal containing smectic phase to chiral nematic phase transition selects trade names S6 (Merck co., Ltd.), SLC-1717 (Shijiazhuang Yongsheng Huaqing Liquid Crystal Co., Ltd.) and chiral additive CB15 (Merck co., Ltd.) Preparation, three ratios are 80%: 15%: 5%, the polymerizable monomer is synthesized by the laboratory, the molecular formula is as follows, the photoinitiator is selected from 1-hydroxycyclohexyl phenyl ketone, trade name 184 (Jingjiang Hongtai Chemical Industry Co., Ltd. Co., Ltd.), the quality of the polymerizable monomer is 5% of the total mass of the mixed liquid crystal, and the quality of the photoinitiator is 1% of the monomer quality. The desired mixed solution can be obtained after the above components are mixed evenly.

[0019] Polymerizable monomer molecular formula:

[0020]

[0021] The mixed solution is injected into a liquid crystal cell made of ITO glass without any surface treatment. The thickness of the liquid crystal ce...

example 2

[0023] The liquid crystal adopts the mixed liquid crystal prepared in Example 1, without adding monomer and photoinitiator.

[0024] The substrate is subjected to surface vertical alignment treatment, and the surface alignment agent used is N, N-dimethyl-N-octadecyl-3-aminipropyltrimethoxysilyl chloride. The smectic phase liquid crystal molecules will be arranged perpendicular to the substrate under the influence of the surface alignment agent, and the film is in a light transparent state; after cooling from the high-temperature chiral nematic phase to the nematic phase, it will also return to the vertical alignment, and then turn from a non-transparent state to a nematic state. transparent state. The transition temperature was 36.3°C.

example 3

[0026] Use a side chain liquid crystal polymer and SLC-1717 to prepare the required liquid crystal with smectic phase to nematic phase transition, add CB15 to it, and the molecules of the side chain liquid crystal polymer are shown below, the mass of the three components The ratio is 6%:90%:4%. Add 1% polymerizable monomer (same as Example 1) and 0.01% photoinitiator 184 to the mixed liquid crystal, and stir evenly. Carry out surface vertical alignment treatment (same as Example 2) to the liquid crystal cell, inject the mixture in the liquid crystal cell, the mesogen of the side chain liquid crystal polymer is subjected to the influence of the surface vertical alignment agent to align the surface of the vertical substrate, and then place the liquid crystal cell in the ultraviolet When irradiated with light, the polymerizable monomers in it will undergo a polymerization reaction, and the vertical alignment of the mesogens will be maintained. The phase transition temperature of...

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Abstract

Liquid crystal with phase change from smectic phase to chirality nematic phase is utilized in the invention. Molecules of liquid crystal in smectic phase are fixed in arrangement mode perpendicular to basal body so that liquid crystal in smectic phase is in transparence stat for light. After temperature is higher than phase change temperature, liquid crystal in smectic phase is changed to chirality nematic phase. In chirality nematic phase, molecules are arranged in texture of focus cone so that liquid crystal is in non-transparent state. When temperature changes, two states are converted automatically. Light can be passed or cut off automatically: in low temperature, light can be passed so that temperature in room is raised; in high temperature, sunlight is cut off to keep temperature unchanged in room. Comparing with PDCL film, the liquid crystal does not need artificial control and additional drive.

Description

technical field [0001] The invention belongs to the field of liquid crystal applications, and in particular provides a method for preparing an intelligent light-shielding film material, which is suitable for preparing an intelligent light-shielding film material that adjusts the passing and blocking of light with temperature. Background technique [0002] The liquid crystal phase is a phase state between solid and liquid. Liquid crystal has both the anisotropy of solid and the fluidity of liquid. This unique property provides us with many application options. Liquid crystal has a wide range of applications in our daily life, such as liquid crystal display, liquid crystal polymer and so on. [0003] Liquid crystal / polymer film composite materials have also been widely used. Polymer Dispersed Liquid Crystals (Polymer Dispersed Liquid Crystals: PDLC) is one of them, and it is also an important material for preparing smart glass. PDLC is a thin film composite material obtained...

Claims

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Application Information

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IPC IPC(8): G02F1/137G02F1/139
Inventor 杨槐马征李文波耿君张卫东王立波杨海莲石琳曹晖高建勋王丽萍杨穆海明潭王戈
Owner 大连知行科技有限公司
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