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Polymer dispersed liquid crystal composition, polymer dispersed liquid crystal layer and preparation method, polymer dispersed liquid crystal film and preparation method

A technology for dispersing liquid crystals and polymers, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of reduced on-state transmittance, difficulty in obtaining, and increased driving voltage, etc., and achieve the reduction of on-state transmittance Effect

Active Publication Date: 2010-07-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some dyes are added to the polymer-dispersed liquid crystal to make the color of the polymer-dispersed liquid crystal film rich, but because of the existence of the dye, it affects the phase separation of the mixture of the polymer and the liquid crystal at a temperature below the clearing point, and at the same time, the liquid crystal droplets There are dye molecules in the film, which increase the driving voltage and reduce the on-state transmittance, and it is difficult to obtain a polymer-dispersed liquid crystal film with a drive voltage below 50V and an on-state transmittance of more than 70%.

Method used

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  • Polymer dispersed liquid crystal composition, polymer dispersed liquid crystal layer and preparation method, polymer dispersed liquid crystal film and preparation method
  • Polymer dispersed liquid crystal composition, polymer dispersed liquid crystal layer and preparation method, polymer dispersed liquid crystal film and preparation method
  • Polymer dispersed liquid crystal composition, polymer dispersed liquid crystal layer and preparation method, polymer dispersed liquid crystal film and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Weigh 30wt% polymer monomer as NOA65 and 70wt% liquid crystal E7, a total of 100 grams, in the container, add 1.5 grams of glass beads with an average particle diameter of 15um as a spacer, weigh 1.2 grams of 1-phenylamino- 4-(Methylamino)anthraquinone, mixed evenly to obtain a mixture, the liquid crystal E7 has a clearing point of 80 degrees, heated the mixture to about 85°C, stirred evenly, and spread it between two pieces of ITO glass at 365nm Ultraviolet light with a wavelength of 5 mw / cm2 light intensity was irradiated for 4 minutes at a room temperature of 25° C. to obtain a polymer dispersed liquid crystal film A1.

Embodiment 2

[0051] Same as Example 1, the difference lies in 40wt% polymer monomer and 60wt% liquid crystal, the weight percentage of polymer monomer and liquid crystal is 40:60, and the polymer dispersed liquid crystal film A2 is obtained.

Embodiment 3

[0053] Same as Example 1, the difference lies in 50wt% polymer monomer and 50wt% liquid crystal, the weight percentage of polymer monomer and liquid crystal is 50:50, and polymer dispersed liquid crystal film A3 is obtained.

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PUM

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Abstract

The invention provides a polymer dispersed liquid crystal layer and a polymer dispersed liquid crystal film containing the polymer dispersed liquid crystal layer. The polymer dispersed liquid crystal layer is non-white. A polymer dispersed liquid crystal composition comprises a polymer monomer, a liquid crystal and a dye. The polymer dispersed liquid crystal layer comprises a three-dimensional porous structure formed by polymers. The pores are filled with liquid crystal droplets and have an average pore size of 2-5mu m. The invention also provides the polymer dispersed liquid crystal composition and methods for preparing the polymer dispersed liquid crystal layer and the polymer dispersed liquid crystal film. By adopting the non-white polymer dispersed liquid crystal layer or the polymer dispersed liquid crystal film containing the polymer dispersed liquid crystal layer, the driving voltage can be simultaneously less than or equal to 40V and the on-state transmittance under 40V can bemore than 75%.

Description

technical field [0001] The invention relates to a polymer dispersed liquid crystal composition, a polymer dispersed liquid crystal layer and a preparation method thereof, a polymer dispersed liquid crystal film and a preparation method thereof. Background technique [0002] Polymer dispersed liquid crystals (Polymer dispersed liquid crystals, PDLC) film is a kind of photoelectric composite material, in polymer dispersed liquid crystal film, liquid crystal droplets of micron scale are dispersed in solid polymer matrix. The polymer-dispersed liquid crystal film is changed from opaque to transparent by applying an electric field, so that the light transmittance of the film can be adjusted. [0003] During preparation, when the mixture of polymer monomer and liquid crystal is heated to a temperature above the clearing point, the liquid crystal is transformed from a crystalline state to a liquid state, fully mixed with the polymer monomer, and the external ambient temperature coo...

Claims

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Application Information

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IPC IPC(8): C09K19/52C09K19/12C08J5/18G02F1/1334
Inventor 毛元燕薛亮陈学刚
Owner BYD CO LTD
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