Temperature-sensitive color-developing liquid crystal microcapsule and preparation method thereof

A technology of microcapsules and liquid crystals, applied in the directions of microcapsule preparation, microsphere preparation, liquid crystal materials, etc., can solve the problems of complex production process, intolerant of solvents, unfavorable for mass production, etc., to expand the scope of application, improve stability, The effect of improving solvent resistance

Inactive Publication Date: 2020-08-21
JIANGSU JICUI INTELLIGENT LCD TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such liquid crystal microcapsules have excellent water resistance, but are not resistant to solvents, which limits the application fields of liquid crystal microcapsules
Moreover, its traditional preparation method is mainly based on complex coacervation and in-situ polymerization, and its production process is complicated, which is not conducive to mass production

Method used

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  • Temperature-sensitive color-developing liquid crystal microcapsule and preparation method thereof
  • Temperature-sensitive color-developing liquid crystal microcapsule and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034]Weigh 0.5 g of cholesterol propionate, 2.0 g of cholesterol nonanoate and 0.2 g of terephthaloyl chloride, and dissolve them in 15 g of ethyl acetate to form a uniform oil phase. 1.5 grams of OP-10 was dissolved in 75 grams of water to form aqueous phase A. 0.1 g of ethylenediamine was dissolved in 10 g of water to form aqueous phase B. Slowly add the oil phase prepared above into the water phase A, and keep stirring for 5 minutes to obtain an oil-in-water emulsion. Slowly add the aqueous phase B into the above emulsion under stirring conditions, stir and react at 50°C for 1.5 hours, then lower the temperature to 25°C, and continue stirring for 0.5 hours to obtain a dispersion of liquid crystal microcapsules with uniform particle size. The liquid crystal microcapsules are separated by centrifugation, washed with water for several times, and then centrifuged to obtain liquid crystal microcapsules with a particle diameter of 3-30 microns. The liquid crystal microcapsules...

Embodiment 2

[0036] Weigh 1.5 g of cholesterol propionate, 6 g of cholesterol nonanoate and 0.8 g of terephthaloyl chloride, and dissolve them in 15 g of ethyl acetate to form a uniform oil phase. 2 g of PVA was dissolved in 95 g of water, and 0.15 g of sodium bicarbonate was added to form aqueous phase A. 0.5 g of hexamethylenediamine and 0.3 g of triethylenetetramine were dissolved in 10 g of 2% PVA aqueous solution to form aqueous phase B. Slowly add the oil phase prepared above into the water phase A, and keep stirring for 5 minutes to obtain an oil-in-water emulsion. Slowly add the aqueous phase B into the above emulsion under stirring conditions, stir and react at 50°C for 1.5 hours, then lower the temperature to 25°C, and continue stirring for 0.5 hours to obtain a dispersion of liquid crystal microcapsules with uniform particle size. The liquid crystal microcapsules are separated by centrifugation, washed with water for several times and then centrifuged to obtain liquid crystal m...

Embodiment 3

[0038] Weigh 0.9 g of cholesterol propionate, 3.6 g of cholesterol nonanoate and 1 g of terephthaloyl chloride, and dissolve them in 15 g of ethyl acetate to form a uniform oil phase. 2 grams of PVA was dissolved in 95 grams of water to form aqueous phase A. 1 g of 2,4,4-trimethylhexamethylenediamine and 0.6 g of triethylenetetramine were dissolved in 10 g of 2% PVA aqueous solution to form aqueous phase B. Slowly add the oil phase prepared above into the water phase A, and keep stirring for 5 minutes to obtain an oil-in-water emulsion. Slowly add the aqueous phase B into the above emulsion under stirring conditions, stir and react at 50°C for 1.5 hours, then lower the temperature to 25°C, and continue stirring for 0.5 hours to obtain a dispersion of liquid crystal microcapsules with uniform particle size. The liquid crystal microcapsules are separated by centrifugation, washed with water for several times, and then centrifuged to obtain liquid crystal microcapsules with a pa...

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Abstract

The invention provides a temperature-sensitive color-developing liquid crystal microcapsule. The liquid crystal microcapsule comprises a core material and a wall material, the core material is cholesteric liquid crystal, and the wall material is formed by interfacial polymerization of a polyacyl chloride compound and a polyamine compound. The invention also discloses a preparation method of the temperature-sensitive color-developing liquid crystal microcapsule. According to the temperature-sensitive color-developing liquid crystal microcapsule, different colors can be displayed along with temperature changes in different temperature ranges according to different liquid crystal formulas used as core materials, and the solvent resistance can be greatly improved while the reflectivity is notinfluenced, so that the stability of the liquid crystal microcapsule is improved, and the application range of the liquid crystal microcapsule is expanded.

Description

technical field [0001] The invention relates to a liquid crystal microcapsule and its preparation and application, in particular to a solvent-resistant, temperature-sensitive and color-developing liquid crystal microcapsule and a preparation method thereof. Background technique [0002] Liquid crystal is a special form between solid and liquid. It has both the fluidity of liquid and the anisotropy of crystal. According to the physical conditions for forming a liquid crystal state, liquid crystals are mainly divided into lyotropic liquid crystals and thermotropic liquid crystals, and thermotropic liquid crystals can be divided into nematic liquid crystals, cholesteric liquid crystals, and smectic phases according to the ordered state of their internal molecular arrangements. liquid crystal. Cholesteric liquid crystal can be considered as a special kind of nematic liquid crystal. The liquid crystal molecules are arranged in layers in the short axis direction. The molecules in...

Claims

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Application Information

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IPC IPC(8): C09K19/54C09K19/36B01J13/16
CPCB01J13/02C09K19/52
Inventor 吕继祥马超龙熊春荣高宇阳
Owner JIANGSU JICUI INTELLIGENT LCD TECH CO LTD
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