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Self-supporting liquid crystal film and preparation method thereof

A liquid crystal film, self-supporting technology, applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of complex process and high production cost

Active Publication Date: 2021-08-10
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process is complicated and the production cost is high

Method used

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  • Self-supporting liquid crystal film and preparation method thereof
  • Self-supporting liquid crystal film and preparation method thereof
  • Self-supporting liquid crystal film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Preparation of liquid crystal material 1 comprising the following structure:

[0039]

[0040] Liquid crystal molecule 1

[0041]

[0042] Chiral dopant 1

[0043]

[0044] Photoinitiator 1

[0045] (1) Synthesis of liquid crystal molecule 1

[0046] Weigh 4-(6-(acryloxy)hexyloxy)benzoic acid (16.73g, 57.22mmol), 2-methylhydroquinone (3.00g, 27.25mmol), dicyclohexylcarbodiimide (DCC) (16.53g, 80.11mmol), 4-dimethylaminopyridine (DMAP) (0.47g, 3.9mmol) were put into a 250mL round-bottomed flask, and redistilled tetrahydrofuran (THF) (100mL) was added; the reaction The mixture was stirred at 0°C for 3 h, and then stirred at room temperature for 48 h; after filtration, recrystallized in methanol, the obtained white solid was liquid crystal molecule 1, and the yield was 63%. figure 1 shown.

[0047] (2) Preparation of liquid crystal materials

[0048] Weigh liquid crystal molecule 1 (50 mg), chiral dopant 1 (1.1 mg) and photoinitiator 1 (3 mg), dissolve and m...

Embodiment 2

[0050] Preparation of liquid crystal material 2 comprising the following components

[0051]

[0052] Liquid crystal molecule 2

[0053]

[0054] Chiral dopant 2

[0055]

[0056] Photoinitiator 1

[0057] (1) Synthesis of liquid crystal molecule 2

[0058] Weigh 4-(6-(acryloyloxy)hexyloxy)benzoic acid (16.73g, 57.22mmol), 2-methylhydroquinone (3.38g, 27.25mmol), dicyclohexylcarbodiimide (DCC) (16.53g, 80.11mmol), 4-dimethylaminopyridine (DMAP) (0.47g, 3.9mmol) were put into a 250mL round-bottomed flask, and redistilled tetrahydrofuran (THF) (100mL) was added; The mixture was stirred at 0°C for 3 h, then at room temperature for 48 h; after filtration, it was recrystallized in methanol, and the obtained white solid was liquid crystal molecule 2 with a yield of 62%. figure 2 shown.

[0059] (2) Preparation of liquid crystal material 2

[0060] Weigh liquid crystal molecule 2 (50 mg), chiral dopant 2 (1.55 mg) and photoinitiator 1 (3 mg), dissolve and mix well wit...

Embodiment 3

[0062] Preparation of liquid crystal material 3 comprising the following components

[0063]

[0064] Liquid crystal molecule 3

[0065]

[0066] Chiral dopant 3

[0067]

[0068] Photoinitiator 1

[0069] (1) Synthesis of Liquid Crystal Molecules 3

[0070] Weigh 4-(6-(acryloyloxy)hexyloxy)benzoic acid (16.73g, 57.22mmol), 2-chlorohydroquinone (3.94g, 27.25mmol), dicyclohexylcarbodiimide ( DCC) (16.53g, 80.11mmol), 4-dimethylaminopyridine (DMAP) (0.47g, 3.9mmol) were put into a 250mL round-bottomed flask, and redistilled tetrahydrofuran (THF) (100mL) was added; the reaction mixture Stir at 0°C for 3h, then stir at room temperature for 48h; after filtration, recrystallize in methanol, the obtained white solid is liquid crystal molecule 3, the yield is 54%, and the polarizing microscope photo is as follows: image 3 shown.

[0071] (2) Preparation of liquid crystal material 3

[0072] Weigh liquid crystal molecule 3 (50 mg), chiral dopant 3 (1.55 mg) and photoini...

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Abstract

The invention belongs to the field of liquid crystal, and particularly relates to a self-supporting liquid crystal membrane and a preparation method thereof. The preparation method comprises the following steps that liquid crystal molecules, a chiral dopant and a photoinitiator are dissolved and mixed in a solvent I and then injected into the water surface, and the self-supporting liquid crystal film is prepared through ultraviolet irradiation. The liquid crystal film is manufactured on the water surface, other substrates are not needed, and the liquid crystal film is easy to obtain; the adopted liquid crystal compound of acrylate can be crosslinked through photopolymerization molecules, a cross-linking agent does not need to be additionally added, and finally the chiral nematic liquid crystal polymer film with an ordered structure is obtained; and the obtained film can be used for reflecting ultraviolet light, visible light and near-infrared light.

Description

technical field [0001] The invention belongs to the field of liquid crystals, and in particular relates to a self-supporting liquid crystal film and a preparation method thereof. Background technique [0002] Liquid crystals are anisotropic fluids, which combine the flow characteristics of ordinary liquids with the anisotropy that is generally only found in crystals. They vary in degree of order and represent thermodynamically stable phases lying between ordinary isotropic liquids and crystalline solids. Liquid crystals are divided into thermotropic liquid crystals and lyotropic liquid crystals. Thermotropic liquid crystals can only be observed through temperature changes and can only exist within a certain temperature range; lyotropic liquid crystals are formed by adding an isotropic solvent. Thermotropic liquid crystals can be divided into smectic phase, nematic phase and cholesteric phase (also known as chiral nematic phase). Cholesteric liquid crystal (CLC) or chiral n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/20C08F2/48C08J5/18C09K19/20C08L35/02
CPCC08F222/102C08F2/48C08J5/18C09K19/2007C08J2335/02C09K2019/2078
Inventor 杨永刚李艺李宝宗曹宇刘玮
Owner SUZHOU UNIV