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Preparation method of polymer-stabilized liquid crystal thin film material with wide wave reflection

A technology for stabilizing liquid crystal and thin film materials, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as unfavorable operation control, strict mixing of liquid crystals, etc. Effect

Inactive Publication Date: 2015-02-04
ZHEJIANG XINGXING OPTICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 1996, D.J.Broer and others from Philips in the Netherlands prepared a single-layer cholesteric liquid crystal polymer film that reflected the entire visible light region by using the principle of gradient diffusion of chiral polymerizable monomers, and applied it to the brightness enhancement film of liquid crystal display. In fact, although this method increases the range of reflection to a certain extent, it can only reflect the entire wavelength range of visible light, and the method of mixing liquid crystals has very strict requirements on the gradient of ultraviolet light intensity, which is not conducive to actual operation control

Method used

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  • Preparation method of polymer-stabilized liquid crystal thin film material with wide wave reflection
  • Preparation method of polymer-stabilized liquid crystal thin film material with wide wave reflection
  • Preparation method of polymer-stabilized liquid crystal thin film material with wide wave reflection

Examples

Experimental program
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Effect test

Embodiment 1

[0048] First, clean the ITO glass, make a liquid crystal cell with a thickness of 10 μm whose inner surface has been processed by parallel rubbing orientation, and set aside;

[0049] According to the mass percentage, the composite system of liquid crystal polymerizable monomer C6M / chiral compound S811 / small molecule nematic liquid crystal SLC1717 / photoinitiator 651 / azo chiral compound 2C is 15.00wt% / 9.20wt% / 75.00wt% / 0.40wt% / 0.40wt% were blended to obtain a liquid crystal composite system with a wide N* phase temperature range. In the liquid crystal cell, obtain the corresponding thin film material sample, and then use ultraviolet light under the condition of 40°C (the intensity of ultraviolet light is 1mw / cm 2 , the wavelength of ultraviolet light is 365nm) after irradiating for 30 minutes, the mixed liquid crystal system is polymerized to form a polymer network, and a liquid crystal film material with broadband reflection is obtained. The obtained liquid crystal thin film ...

Embodiment 2

[0060] First, clean the ITO glass, make a liquid crystal cell with a thickness of 10 μm whose inner surface has been processed by parallel rubbing orientation, and set aside;

[0061] According to the mass percentage, the composite system of the raw material liquid crystal polymerizable monomer C6M / chiral compound S811 / small molecule nematic liquid crystal SLC1717 / photoinitiator 651 / azo chiral compound 2C is 15.00wt% / 9.00wt according to the mass ratio % / 75.00wt% / 0.40wt% / 0.60wt% for blending to obtain a liquid crystal composite system with a wide N* phase temperature range. In the oriented liquid crystal cell, obtain the corresponding thin film material sample, and then use ultraviolet light under the condition of 40 ℃ (the intensity of the ultraviolet light is 3mw / cm 2 , the wavelength of the ultraviolet light is 365nm) after irradiating for 30 minutes, the mixed liquid crystal system is polymerized to form a polymer network, and a liquid crystal film material with broad-wave ...

Embodiment 3

[0063] First, clean the ITO glass, make a liquid crystal cell with a thickness of 10 μm whose inner surface has been processed by parallel rubbing orientation, and set aside;

[0064] According to mass percentage, weigh 85wt% nematic liquid crystal SLC1717, 5.0wt% chiral compound R811, 8.0wt% liquid crystal polymerizable monomer, 1.5wt% azo chiral compound and 0.5wt% light The initiator benzophenone is blended to obtain a liquid crystal composite system with a wide N* phase temperature range. First, the liquid crystal composite system is poured into the above-mentioned liquid crystal cell that has undergone surface-parallel rubbing orientation at 100 ° C to obtain Corresponding film material samples, and then use ultraviolet light under the condition of 45 ℃ (the intensity of the ultraviolet light is 1μw / cm 2 , the wavelength of the ultraviolet light is 365nm) after irradiating for 1 hour, the mixed liquid crystal system is polymerized to form a polymer network, and a liquid c...

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Abstract

The invention relates to a preparation method of a polymer-stabilized liquid crystal thin film material with wide wave reflection. The preparation method belongs to the technical field of optical thin film materials. In order to solve the problem that a present technological process is complex, is not easy to control and has a disadvantage of narrow reflected wave, the invention provides the preparation method of the polymer-stabilized liquid crystal thin film material with wide wave reflection. The preparation method comprises the following steps: mixing 5wt%-85wt% of a nematic phase liquid crystal, 5.0wt%-15wt% of a chiral compound and 8.0wt%-20wt% of a liquid crystal polymerizable monomer, adding 0.2wt%-1.5wt% of an azo chiral compound and 0.01wt%-10wt% of a photoinitiator so as to obtain a mixed liquid crystal system; injecting into a liquid crystal cell which has undergone plane orientation in advance so as to obtain a thin film sample; and carrying out UV-light irradiation within the cholesteric phase temperature so as to obtain the liquid crystal thin film material. The preparation method provided by the invention has advantages of simple process, wide temperature range of the cholesteric phase and wide wave reflection, and is easy to operate.

Description

technical field [0001] The invention relates to a preparation method of a polymer-stabilized liquid crystal film material with broad-wave reflection, and belongs to the technical field of optical film materials. Background technique [0002] Since liquid crystal was discovered in 1888, it has developed vigorously in the past 20 years. From the popular electronic watches, to LCD TVs, mobile phones, and now to electronic paper and e-books, the application of liquid crystals in people's daily life is becoming more and more extensive. While liquid crystal display technology is changing with each passing day, energy saving and environmental protection have become a new topic that we will face. [0003] As we all know, most liquid crystals do not emit light by themselves, and need a backlight system to provide light sources. The brightness of liquid crystal displays affects the quality of images to a certain extent. Since the backlight system accounts for a high proportion of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/52G02F1/1334C08F22/20
Inventor 王玲陈兴武宋平阮云芳
Owner ZHEJIANG XINGXING OPTICS MATERIAL
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