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Preparation method of liquid crystal microcapsule for textile printing

A technology of microcapsules and textiles, which is applied in the fields of fine chemicals and materials science, can solve problems affecting the clarity and color of cholesteric liquid crystals, unsuitable application of capsule wall materials, and shortening the service life of liquid crystals, so as to meet the needs of clothing personalization and Requirements for diversity, bright color, narrow particle size distribution

Active Publication Date: 2017-05-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there are many methods for preparing liquid crystal microcapsules, there are still many problems in applying them to textiles: poor transparency of capsule wall materials will affect the clarity and color of cholesteric liquid crystal display; walls with poor solvent resistance or water resistance The material will cause the color to fade and shorten the life of the liquid crystal; some wall materials are not suitable for applying on textiles

Method used

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  • Preparation method of liquid crystal microcapsule for textile printing
  • Preparation method of liquid crystal microcapsule for textile printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 3g of cholesteryl nonanoate and 7g of cholesteryl oleyl carbonate and heat until they are completely dissolved and become transparent. After stirring at this temperature for 2 hours, cool down until the mixed liquid crystal appears color or turbid, and then heat up to just transparent. The temperature is the clearing point of the mixed liquid crystal, and stirred at constant temperature for 4 hours to obtain the mixed liquid crystal.

[0019] 2.5g sodium dodecylbenzene sulfonate is dissolved in 72.5g deionized water, be warmed up to the clearing point temperature of mixed liquid crystal, drop mixed liquid crystal thereinto under mechanical stirring, high-speed emulsification forms uniform liquid crystal dispersion; 2.5 1 g of n-butyl acrylate and 2.5 g of methyl methacrylate were evenly mixed and added dropwise to the liquid crystal dispersion, and the emulsification was continued for 60 minutes. Then transferred to a four-necked flask with condensing reflux and sti...

Embodiment 2

[0021] Mix 1g of cholesteryl propionate, 1.5g of cholesteryl oleate, 2g of cholesteryl benzoate, and 0.5g of cholesteryl ethyl carbonate and heat until they are completely dissolved. Stir at this temperature for 3 hours, then cool down to the mixing After the color or turbidity of the liquid crystal appears, the temperature is raised until it is just transparent. This temperature is the clearing point of the mixed liquid crystal. Stir at constant temperature for 5 hours to obtain the mixed liquid crystal.

[0022] Dissolve 0.5g OP-10 in 79.5g deionized water, heat up to the temperature of the clearing point of the mixed liquid crystal, add the mixed liquid crystal dropwise under the action of mechanical stirring, and emulsify at high speed to form a uniform liquid crystal dispersion; mix 2g styrene and 3g acrylic acid Ethyl ester was added dropwise to the liquid crystal dispersion after uniform mixing, and then added dropwise to the liquid crystal dispersion, and the emulsifica...

Embodiment 3

[0024] Mix 5g of cholesteryl carbonate, 8g of cholesteryl oleate, and 2g of cholesteryl chloride and heat until they are completely dissolved. After stirring for 3 hours at this temperature, cool down until the color or turbidity of the mixed liquid crystal appears, and then heat up to just Transparent, this temperature is the clearing point of the mixed liquid crystal, stirring at constant temperature for 5 hours, the mixed liquid crystal is obtained.

[0025]Dissolve 7.5g DNS-86 in 58.5g deionized water, heat up to the temperature of the clearing point of the mixed liquid crystal, add the mixed liquid crystal dropwise under the action of mechanical stirring, and emulsify at high speed to form a uniform liquid crystal dispersion; After the ester and 6 g of isoprene were mixed evenly, they were added dropwise to the liquid crystal dispersion, and the emulsification was continued for 45 minutes. Then transferred to a four-necked flask with condensing reflux and stirring device,...

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Abstract

The invention discloses a preparation method of a liquid crystal microcapsule for textile printing, and belongs to the technical field of fine chemical engineering and material science. The liquid crystal microcapsule suitable for textile printing is prepared through the emulsion polymerization. The shell structure of the obtained liquid crystal microcapsule can protect liquid crystal, improve water resistance and solvent resistance of the liquid crystal and can take participation in film forming, the color of the liquid crystal microcapsule is bright and varied, the original color property can still be kept after textile processing and treatment, and the liquid crystal microcapsule can better meet requirements of textiles and can meet the requirements of people for clothes personalization and diversity.

Description

technical field [0001] The invention relates to a method for preparing liquid crystal microcapsules for textile printing, which belongs to the technical fields of fine chemical industry and material science. Background technique [0002] Cholesteric liquid crystal is an organic reversible color-reversing material, which has the advantages of fast response speed, high color-changing sensitivity, bright color, rich color-changing layers, and good light stability. Cholesteric liquid crystal has no chromophoric group, but it has a helical structure in spatial structure. When light of different wavelengths is incident on cholesteric liquid crystal, most of the light will be transmitted with a certain optical rotation, and a small part Light with a wavelength equal to the pitch is reflected back, giving cholesteric liquid crystals their characteristic optical color. In addition, it belongs to biomass itself, which is harmless to the human body and has the advantage of biocompatib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/14C08F212/08C08F236/08C08F218/08B01J13/14C09K19/36C09K19/52D06P1/52D06P1/651
CPCB01J13/14C08F218/08C08F220/14C08F220/18C08F220/1804C08F220/1818C08F236/08C09K19/36C09K19/52D06P1/525D06P1/65118D06P1/65125C08F220/1808C08F212/08
Inventor 付少海关玉张丽平李敏王春霞
Owner JIANGNAN UNIV
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