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A kind of dye-doped liquid crystal microcapsule material and preparation method thereof

A liquid crystal material and doped technology, applied in the fields of fine chemical industry and material science, can solve the problems of inability to achieve multi-color color rendering of a single liquid crystal microcapsule, high driving voltage of liquid crystal microcapsules, and obvious light scattering effect, and achieve color rendering. Bright, good dichroism and broad application prospects

Active Publication Date: 2020-06-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electrochromic liquid crystal microcapsules prepared by these methods, when using the cholesteric liquid crystal as the core material, the driving voltage of the liquid crystal microcapsule is higher; while using the dichroic dye-doped nematic liquid crystal as the core material, it cannot be achieved Colorful color rendering of a single liquid crystal microcapsule; if multiple single color-changing liquid crystal microcapsules are mixed and used, due to the difference in particle size of the liquid crystal microcapsules, the light scattering effect is obvious and the color rendering effect is not good

Method used

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  • A kind of dye-doped liquid crystal microcapsule material and preparation method thereof
  • A kind of dye-doped liquid crystal microcapsule material and preparation method thereof
  • A kind of dye-doped liquid crystal microcapsule material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0051] Mix 0.01g of C.I. Disperse Red 60 and 1g of mixed liquid crystal E7, heat it until it is just completely dissolved and become transparent, stir at this temperature for 0.5h, cool down until the mixture appears color or turbid, then raise the temperature until it is just transparent, and stir at constant temperature After 0.5h, a red dye-doped liquid crystal was obtained.

[0052] Keep the obtained red dye-doped liquid crystal at the clearing point temperature, and add it dropwise to the aqueous solution containing 0.2g lauryl polyoxyethylene ether at the same temperature under the action of mechanical stirring, and emulsify at a high speed to form a uniform dispersion ; Add 0.5g butyl methacrylate and 0.5g isoprene, 0.1g divinylbenzene and 0.05g trifluoroethyl methacrylate to the liquid crystal dispersion dropwise after uniform mixing, and continue to emulsify for 60 minutes . Then transfer to a four-necked flask with condensing reflux and stirring device, nitrogen gas...

Embodiment 2

[0058] Mix 0.01g of C.I. Disperse Blue 359 and 1g of mixed liquid crystal E7, heat it until just completely dissolved and become transparent, stir at this temperature for 0.5h, cool down until the mixture appears color or turbid, then raise the temperature until it is just transparent, and stir at constant temperature After 0.5h, the blue dye-doped liquid crystal was obtained.

[0059] Keep the obtained blue dye-doped liquid crystal at the clearing point temperature, and add it dropwise to an aqueous solution containing 0.1g OP-10 at the same temperature under mechanical stirring, and emulsify at a high speed to form a uniform dispersion; 0.5 g of hexyl methacrylate, 0.25 g of styrene, 0.375 g of divinylbenzene and 0.225 g of trifluoroacetyl trifluoromethanesulfonate were evenly mixed and added dropwise to the liquid crystal dispersion, and the emulsification was continued for 60 minutes. Then transfer to a four-necked flask with condensing reflux and stirring device, nitrogen...

Embodiment 3

[0064] Mix 0.001g of C.I. Disperse Blue 60 and 1g of mixed liquid crystal 5CB, heat it until it is completely dissolved and become transparent, stir at this temperature for 0.5h, cool down until the mixture appears color or turbid, then raise the temperature until it is just transparent, and stir at constant temperature After 0.5h, the blue dye-doped liquid crystal was obtained.

[0065]The obtained blue dye-doped liquid crystal is kept at the clearing point temperature, and it is added dropwise to an aqueous solution containing 0.5g SE-10 at the same temperature under mechanical stirring, and is emulsified at a high speed to form a uniform dispersion; 0.1 g of butyl acrylate and 0.2 g of methyl methacrylate, 0.003 g of diacetone acrylamide and 0.003 g of hexafluorobutyl methacrylate were evenly mixed and added dropwise to the liquid crystal dispersion, and the emulsification was continued for 60 minutes. Then transfer to a four-necked flask with condensing reflux and stirring...

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Abstract

The invention discloses a preparation method of a dye-doped liquid crystal microcapsule, and belongs to the technical fields of fine chemical engineering and material science. The dye-doped liquid crystal prepared by the method has a multilayer structure, and the outer dye-doped liquid crystal and a polymer shell layer which are used as a chromogenic layer and the core dye-doped liquid crystal microcapsule undergo subtractive color matching, and the chromogenic layer is also used as a protection layer to protect the inner dye-doped liquid crystal from being polluted by an external environment.The liquid crystal microcapsule prepared by the method has the advantages of bright and variable color, low driving voltage, good resistance to solvents and water, keeping of the original color performance after processing treatment, meeting of the customized and diverse chromogenic demands of liquid crystals in intelligent textiles, and broad application prospect.

Description

technical field [0001] The invention belongs to the technical fields of fine chemical industry and material science, and in particular relates to a dye-doped liquid crystal microcapsule material and a preparation method thereof. Background technique [0002] Liquid crystal display is widely used in practice because of its excellent optical performance and electro-optic effect. At the same time, in order to expand the application of liquid crystals under specific needs, such as flexible display technology, smart fiber preparation, etc., the liquid crystal microencapsulation process plays a vital role in this. On the one hand, the dispersion, protection and stabilization of liquid crystals are realized through coating, and the liquid crystals are prevented from flowing during device flexure, thereby ensuring the feasibility of liquid crystal flexible displays; on the other hand, by controlling the size and distribution to adjust the size of liquid crystal droplets in the syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F236/08C08F212/36C08F220/22C08F2/44B01J13/14
CPCB01J13/14C08F2/44C08F220/18C08F220/1804C08F236/08C08F212/36C08F220/22
Inventor 付少海张丽平盛明非李敏王冬刘明明
Owner JIANGNAN UNIV
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