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Method for preparing liquid crystal vertical orented membrane

A vertical alignment, liquid crystal technology, applied in optics, instruments, nonlinear optics, etc., can solve the problem of rarely preparing liquid crystal vertical alignment films, and achieve the effect of simplifying the process and the process.

Inactive Publication Date: 2005-07-20
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] However, the photo-controlled alignment method is often used to prepare parallel alignment films of liquid crystal molecules, and is rarely used to prepare vertical alignment films of liquid crystals.

Method used

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  • Method for preparing liquid crystal vertical orented membrane
  • Method for preparing liquid crystal vertical orented membrane
  • Method for preparing liquid crystal vertical orented membrane

Examples

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Embodiment Construction

[0027] 1) Synthesis of hexafluorobisphenol A bis-cinnamate monomer

[0028] Dissolve 3.31 g of hexafluoro-substituted bisphenol A (Aldrich Co., USA) in 40 mL of anhydrous tetrahydrofuran (Tianjin Tiantai Chemical Co., Ltd., imported subpackage), and place it in a 100 mL three-necked bottle. Then take 2.76 mL of triethylamine (Shenyang Dongxing Chemical Factory) and add it directly to the three-necked bottle.

[0029] Dissolve 4.1 g of cinnamoyl chloride (Aldrich Co., USA) in 10 mL of anhydrous tetrahydrofuran, and place it in a 50 mL dropping funnel.

[0030] Under ice water cooling, slowly add the cinnamic acid chloride solution dropwise to the three-necked flask, and at the same time turn on the automatic mixer to stir, a large amount of white insoluble matter is formed. After the addition is complete, continue stirring for 30 minutes.

[0031] Filter out the insoluble matter to obtain a colorless and transparent solution.

[0032] The colorless and transparent solution was pour...

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Abstract

This invention is a method of producing the liquid crystal vertical tropism membrane. This invention chooses the monomer with cinnamonic acid structure at both ends of the molecule, and the hexafluorodiphene A dicinnamonic acid ester containing fluoroform radicle. At the normal temperature, dissolve the hexafluorodiphene A dicinnamonic acid ester in the solvent of quadplex hydroxy furan to confect into solution. Smear the solution on the basal board reelingly to form membrane. Shine the monomer membrane material of the hexafluorodiphene A dicinnamonic acid ester with the ultraviolet radiation, and make the both ends of the monomer molecule take place [2+2] cycloaddition reaction, then produce a tropism membrane that can induce the liquid crystal vertical tropism array. This invention avoids heat treatment at high temperature in the confecting process, which consumedly simplified the traditional technics of confecting the liquid crystal vertical tropism membrane. Compared with the traditional method of confecting the liquid crystal vertical tropism membrane, this invention has a simpler technics, and is a new method of confecting the liquid crystal vertical tropism membrane.

Description

Technical field [0001] The invention belongs to the technical field of optoelectronic materials, and relates to the preparation of an alignment film of a liquid crystal device, in particular to a method for preparing a vertical alignment film of a liquid crystal. Background technique [0002] Liquid crystal displays are favored by people in the field of information display because of their flat panel, easy portability, low power consumption, no electromagnetic radiation, and no damage to eyesight. However, the shortcomings of narrow viewing angle and slow response speed limit the application of liquid crystal displays. Although the response speed of ferroelectric liquid crystals is much higher than that of nematic liquid crystals, a stable alignment method that can be put into practical use has not yet been found. In twisted nematic liquid crystal display (TN-LCD), super twisted nematic liquid crystal display (STN-LCD), thin film transistor twisted nematic liquid crystal display ...

Claims

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Application Information

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IPC IPC(8): G02F1/1334G02F1/1337G02F1/139
Inventor 宣丽于涛彭增辉刘永刚胡立发
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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