A method for regulating the orientation of liquid crystal molecules through special rod-like molecules or their polymers

A technology of liquid crystal molecules and polymers, applied in liquid crystal materials, chemical instruments and methods, organic chemistry, etc., can solve problems such as complex processes and affect the use of materials, and achieve the effect of simple and easy methods.

Active Publication Date: 2021-11-09
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional method based on rubbing orientation seriously affects the use of materials due to the static electricity and dust generated during the rubbing process.
With the continuous advancement of science, methods to control the orientation of liquid crystals by using light, electricity, and magnetic fields have been proposed one after another, but these methods are all realized by external stimuli (such as light, electricity, and magnetism), which makes the process complicated.

Method used

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  • A method for regulating the orientation of liquid crystal molecules through special rod-like molecules or their polymers
  • A method for regulating the orientation of liquid crystal molecules through special rod-like molecules or their polymers
  • A method for regulating the orientation of liquid crystal molecules through special rod-like molecules or their polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A method for regulating the alignment of 5CB liquid crystals by special rod-shaped molecules containing azobenzene or polymers thereof, comprising the steps of:

[0038] (1) Preparation of special rod-shaped molecules containing azobenzene and their polymers:

[0039] Raw materials: paracetamol, 1-bromooctane, acetone, anhydrous potassium carbonate, absolute ethanol, sodium hydroxide, potassium nitrite, phenol, hydrochloric acid, terephthalic acid, oxalyl chloride, dichloromethane, tetrahydrofuran ( THF), triethylamine, azobisisobutyronitrile (AIBN), chlorobenzene, dichloromethane.

[0040] Weigh dry raw material vinyl terephthalic acid (1.2g, 7.22mmol), dissolve in 50ml dry dichloromethane and 2ml oxalyl chloride [(COCl) 2 ] in a 100mL round-bottomed flask, placed in a 60°C oil bath, and stirred until clarified. The reaction solution was spin-dried, and then 30 ml of refined tetrahydrofuran was added to obtain an acyl chloride reaction solution, which was set aside. ...

Embodiment 2

[0051] A method for regulating the interval of 5CB liquid crystals through special rod-shaped molecules containing biphenylazo or polymers thereof, comprising the steps of:

[0052] (1) Synthesis of special rod-shaped molecules containing biphenylazo or their polymers:

[0053] Raw materials: 4-(4'-hydroxy)azophenylbiphenol, 1-bromooctane, acetone, anhydrous potassium carbonate, anhydrous ethanol, sodium hydroxide, potassium nitrite, phenol, hydrochloric acid, terephthalic acid, Oxalyl Chloride, Dichloromethane, Tetrahydrofuran (THF), Triethylamine, Azobisisobutyronitrile (AIBN), Chlorobenzene, Dichloromethane.

[0054] Weigh dry raw material vinyl terephthalic acid (1.2g, 7.22mmol), dissolve in 50ml dry dichloromethane and 2ml oxalyl chloride [(COCl) 2 ] in a 100mL round-bottomed flask, placed in a 60°C oil bath, and stirred until clarified. The reaction solution was spin-dried, and then 30 ml of refined tetrahydrofuran was added to obtain an acyl chloride reaction solution...

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Abstract

The invention discloses a method for regulating the orientation of liquid crystal molecules through special rod-shaped molecules or polymers thereof. First, special rod-shaped molecules or their polymers are used as dopants to dope with liquid crystal molecules respectively to form a uniform mixture. At the temperature of the melting point of the mixture, the mixture is sucked into the empty liquid crystal cell by capillary effect, and the liquid crystal molecules can be induced in the liquid crystal cell. orientation. This method uses the force between special rod-shaped molecules or their polymers and liquid crystal molecules to induce the orientation of liquid crystal molecules. Compared with the traditional method of using external conditions such as electric field and magnetic field to induce the orientation of liquid crystal molecules, this method is simpler and easier, and Has good stability. The invention has potential application prospects in the fields of liquid crystal display materials, photoelectric materials, biomedicine and the like.

Description

technical field [0001] The invention discloses a method for regulating the orientation of liquid crystal molecules through special rod-shaped molecules or polymers thereof, belonging to the technical field of materials. Background technique [0002] Liquid crystal is a special form, which has both the fluidity of liquid and the anisotropy of crystal, so its application involves many fields such as physics and materials science. The birefringence, scattering, optical rotation and other properties of liquid crystals change with the arrangement of liquid crystal molecules, so they are widely used in display materials. Controlling the alignment of liquid crystal molecules is the key to liquid crystal display devices. The traditional method based on rubbing orientation seriously affects the use of materials due to the static electricity and dust generated during the rubbing process. With the continuous advancement of science, methods to control the orientation of liquid crystal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/56C07C245/08C08F112/32
CPCC07C245/08C08F112/32C09K19/56
Inventor 谢鹤楼胡俊陈黄匡泽洋
Owner XIANGTAN UNIV
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