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Cholesteric liquid crystal structure color material, preparation method thereof and application thereof in image-text printing

A technology of cholesteric liquid crystal and structural color, which is applied in applications, household utensils, inks, etc., can solve the problems that limit the preparation and application of cholesteric liquid crystal structural color materials, poor size uniformity, etc., and achieve excellent film-forming properties, good Hydrogen bonding force, the effect of improving the adhesive force

Inactive Publication Date: 2021-04-27
GUANGDONG ZHUANGLI COLOR PRINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the liquid crystal microspheres in the obtained cholesteric liquid crystal structural color material is currently lacking in a simple and easy method to effectively control, and its size uniformity is poor; and the thickness of the shell material of the microsphere polymer needs to be controlled to be thin enough , in order to meet the selective absorption and reflection of visible light by the cholesteric liquid crystal core material, and ensure the saturation and rendering effect of the color
The above-mentioned problems of microencapsulated cholesteric liquid crystals undoubtedly greatly limit the preparation and application of cholesteric liquid crystal structural color materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this embodiment, the preparation method of the cholesteric liquid crystal structural color material comprises the following steps:

[0037] (1) Dissolve 0.62g of polyvinyl alcohol and 0.12g of cationic starch in 6.4g of deionized water (after adding polyvinyl alcohol and cationic starch, heat to 95°C and keep it warm for 30 minutes, while using a mechanical stirring device for continuous stirring (the speed of continuous stirring is 800rpm), to obtain a uniform aqueous solution of polyvinyl alcohol and cationic starch), to obtain an aqueous solution of polyvinyl alcohol and cationic starch;

[0038] (2) Adjust the polyvinyl alcohol and cationic starch aqueous solution to the set temperature (the set temperature is 60°C), then add 4.5g of cholesteric liquid crystal into the polyvinyl alcohol and cationic starch aqueous solution, and stir evenly (adding the cholesteric phase Continue to stir for 10 hours after liquid crystal, and then gradually lower the temperature to...

Embodiment 2

[0048] In this embodiment, the preparation method of the cholesteric liquid crystal structural color material comprises the following steps:

[0049] (1) Dissolve 0.64g of polyvinyl alcohol and 0.12g of cationic starch in 5.1g of deionized water (after adding polyvinyl alcohol and cationic starch, heat to 93°C and keep it warm for 50 minutes, while using a mechanical stirring device for continuous stirring (the speed of continuous stirring is 1000rpm), to obtain a uniform aqueous solution of polyvinyl alcohol and cationic starch), to obtain an aqueous solution of polyvinyl alcohol and cationic starch;

[0050] (2) Adjust the polyvinyl alcohol and cationic starch aqueous solution to the set temperature (the set temperature is 55°C), then add 5 g of cholesteric liquid crystal to the polyvinyl alcohol and cationic starch aqueous solution, and stir evenly (adding cholesteric liquid crystal Then continue to stir for 8 hours, then gradually lower the temperature to 20°C at a cooling...

Embodiment 3

[0060] In this embodiment, the preparation method of the cholesteric liquid crystal structural color material comprises the following steps:

[0061] (1) Dissolve 0.75g of polyvinyl alcohol and 0.12g of cationic starch in 6.4g of deionized water (after adding polyvinyl alcohol and cationic starch, heat to 92°C and keep it warm for 25 minutes, while using a mechanical stirring device for continuous stirring (the speed of continuous stirring is 500rpm), to obtain a uniform aqueous solution of polyvinyl alcohol and cationic starch), to obtain an aqueous solution of polyvinyl alcohol and cationic starch;

[0062] (2) Adjust the polyvinyl alcohol and cationic starch aqueous solution to the set temperature (the set temperature is 65°C), then add 5.8g of cholesteric liquid crystal into the polyvinyl alcohol and cationic starch aqueous solution, and stir evenly (adding the cholesteric phase Continue to stir for 8 hours after liquid crystal, and then gradually lower the temperature to ...

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Abstract

The invention relates to a cholesteric liquid crystal structure color material. The cholesteric liquid crystal structure color material is a sol emulsion formed by uniformly dispersing cholesteric liquid crystals in a polyvinyl alcohol and cationic starch sol system. The invention also provides a preparation method of the cholesteric liquid crystal structure color material. The invention also provides an application of the cholesteric liquid crystal structure color material in image-text printing. The cholesteric liquid crystal structure color material can form a uniformly distributed liquid crystal sol emulsion system, the preparation process is simple, the cost is low, and when the cholesteric liquid crystal structure color material is applied to printing ink, the printing ink can have excellent printability and film-forming property.

Description

technical field [0001] The invention relates to a structural color ink, in particular to a cholesteric liquid crystal structural color material, a preparation method thereof and an application in graphic printing. Background technique [0002] Structural color materials widely exist in nature. The color is derived from the Bragg diffraction and selective reflection of visible light by the photonic crystal structure. The construction of photonic crystal microstructure can be realized through the existing technical means, so that the graphic information can be transformed into a Presented in a novel way. This type of structural color material has great application prospects in the field of printing and packaging. Domestic patent documents (publication numbers CN1808214A, CN108530583A and other Chinese invention application instructions) report the application of common colloidal photonic crystals in printing and packaging, but the processing of such materials The cost is high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/03
CPCC09D11/03
Inventor 汤树海朱琦陈广学李仁爱
Owner GUANGDONG ZHUANGLI COLOR PRINTING
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