Preparation method and application of controllable polarization thin film

A polarizing film and film technology, which is applied in the direction of polarizing elements, etc., can solve the problems of difficult recovery and the like, and achieve the effects of convenient preparation, low price and simple structure

Inactive Publication Date: 2008-11-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sensor device that achieves polarization by stretching is also not suitable for light-scattering polarizing films composed of oriented electrospun nanofiber films and liquid crystals, because its orientation is fixed and it is not easy to recover once it is changed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A. Preparation of disordered network electrospun nanofiber film:

[0026] The average molecular weight is 100,000, and the acetone solution of polybutylmethacrylate and polymethylmethacrylate copolymer with a concentration of 20% is driven by a voltage of 10,000 volts provided by a high-voltage positive power supply at a rate of 1 ml / hour. And squirt. An array of needles (0.5 mm in diameter) with a pitch of 3 mm and a distance of 15 cm from the counter electrode was fixed on a copper plate with a size of 10 cm x 10 cm. After 2 hours of electrospinning, the electrospun nanofiber film collected on the needle array was removed for use.

[0027] B, preparation of light-scattering polarizing film:

[0028] After the above-mentioned net-shaped electrospun nanofiber film was cut into 2 cm×2 cm, its four sides were respectively fixed by four clips, and it was placed on a glass slide. Inject liquid crystal material PN-001 into the film. Press lightly on top of a coverslip. ...

Embodiment 2

[0033] A. Preparation of disordered network electrospun nanofiber film:

[0034] The average molecular weight is 100,000, and the polybutylmethacrylate toluene solution with a concentration of 20% is sprayed at a speed of 1 ml / hour by a voltage of 10,000 volts provided by a high-voltage positive power supply. The counter electrode is a 10 cm x 10 cm square with a distance of 15 cm and a copper mesh with a hole diameter of 1 mm. After 2 hours of electrospinning, the electrospun nanofiber film collected on the copper grid was removed for use.

[0035] B, preparation of light-scattering polarizing film:

[0036] After the above-mentioned net-shaped electrospun nanofiber film was cut into 2 cm × 2 cm, one piece was placed on the top and bottom of the film, and its four sides were respectively fixed by four clips, and it was placed on a glass slide. Inject the liquid crystal material SLC-9023 into the film. Press lightly on top of a coverslip.

[0037] C. Light polarization con...

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PUM

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Abstract

The invention relates to the preparation for a controllable polarized membrane and the application thereof, in particular to using a high molecular material for preparing an isotropic netty nano fiber membrane by the electrospinning technology; then the nano fiber membrane is compounded with a liquid crystal material and pulled along polarization direction needed, which causes nano fiber to be oriented along the pulling direction and guides the orientation of the pulling direction of liquid crystal, thereby obtaining the membrane with a controllable preparation direction. The membrane can be applied to the display and sensing fields. The preparation comprises the following steps: A. a disordered netty electrospinning nano fiber membrane is prepared at first; B. secondly, the liquid crystal material is injected into and compounded with the netty electrospinning nano fiber membrane; C. the netty electrospinning nano fiber membrane compounded with the liquid crystal material is pulled along the direction needing orientation, and the nano fiber on the nano fiber membrane is led to be oriented along the pulling direction and the liquid crystal is induced to be arranged along the orientation of the nano fiber by the surface of the nano fiber membrane, thereby realizing the control of the polarization orientation of light.

Description

technical field [0001] The invention relates to a method for preparing a controllable polarizing film and its application, in particular to preparing an isotropic net-like nanofiber film by electrospinning a polymer material, then compounding the nanofiber film with a liquid crystal material, and Stretching the nanofiber film along the direction that needs to be polarized allows the nanofibers to align along the stretching direction and guides the liquid crystal to align along the stretching direction, thereby obtaining a film with a controllable polarization direction. The thin film can be applied to display and sensing fields. Background technique [0002] Because of its ability to effectively control the transmission of light waves, polarizing films are widely used in liquid crystal displays, shading sunglasses, anti-glare goggles, cameras, polarizing filters in front of camera mirrors, anti-glare devices for car headlights, and various polarizing in microscopes or testi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30C08J5/18
Inventor 张继中
Owner SOUTHEAST UNIV
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