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Liquid crystal composite polarizing film and preparation method and application thereof

A technology of polarizing film and liquid crystal, applied in liquid crystal materials, chemical instruments and methods, optics, etc., can solve the problems of difficult control, high production cost of wire grid polarizing film, and complicated process.

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

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Problems solved by technology

In addition, the period of the wire grid must be less than one-third of the incident ultraviolet light, which is diffi

Method used

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  • Liquid crystal composite polarizing film and preparation method and application thereof

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Experimental program
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Embodiment 1

[0036] 1) Synthesis of bismuth phosphomolybdate subnanowires by room temperature reaction

[0037] Weigh 0.8g of phosphomolybdic acid and 0.2g of bismuth nitrate, add them into a 40mL reaction kettle, add 16mL of deionized water, and stir for 10 minutes. Then 10 mL of octadecene and 6 mL of oleylamine were added and stirred for 10 minutes. Subsequently, the reaction vessel was sealed and placed in an oven at 180° C. for 8 hours and then naturally cooled to room temperature. Pour the product in the reaction kettle into a centrifuge tube, add n-octane and ethanol and centrifuge and wash three times.

[0038] 2) Preparation of subnanowire-liquid crystal molecule mixed solution

[0039] Disperse the subnanowires in chloroform to prepare 10 mL of dispersion liquid with a concentration of 40 mg / mL, add 2 mL of 4-cyano-4'-pentylbiphenyl, stir for 10 minutes, and mix well.

[0040] 3) Preparation of subnanowire-liquid crystal composite polarizing film

[0041] Drop 1mL of film-mak...

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Abstract

The invention discloses a liquid crystal composite polarizing film and a preparation method and application thereof. The polarizing film comprises liquid crystal molecules and 0.8-1.2 nm inorganic sub-nanowires and does not contain other additives, and the inorganic sub-nanowires are orderly arranged in the liquid crystal molecules. The polarizing film is prepared by uniformly mixing the inorganic sub-nanowires and the liquid crystal molecules and orderly arranging the inorganic sub-nanowires and the liquid crystal molecules, does not contain other additives, is simple in preparation process, time-saving and labor-saving, is stable in structure and performance, is suitable for both ultraviolet light and visible light, and can be widely applied to polarizing devices.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a liquid crystal composite polarizing film and a preparation method and application thereof. Background technique [0002] Polarizing film is an important optical device and has important applications in the field of optics. After a beam of natural light passes through the polarizing film, the light intensity along the direction of the polarization axis of the polarizing film will be stronger than the light intensity perpendicular to the direction of the polarization axis. At present, the main polarizing films used mainly include iodine-based polarizing films, dyed-based polarizing films and wire grid polarizing films. The former two are polarizing films mainly based on polymer films. Iodine molecules or organic dyes are adsorbed on the polymer films, and then extended and oriented to make them have polarizing properties. The process is more complicated. In addition, under ...

Claims

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Application Information

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IPC IPC(8): C09K19/52G02B5/30
CPCC09K19/52G02B5/3016C09K2019/521
Inventor 王训张思敏
Owner TSINGHUA UNIV