Humidity-sensitive color-changing microcapsule and preparation method and application thereof

A moisture-sensitive discoloration and microcapsule technology, applied in the field of fabric printing, can solve the problems of poor effect and small application range, and achieve the effects of rich pore structure, improved sensitivity and color rendering, stable thermal performance and mechanical strength.

Inactive Publication Date: 2021-11-30
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: The technical problem to be solved by the present invention is to provide a moisture-sensitive color-changing microcapsule to solve the problems in the prior art that the repeated discoloration of moisture-sensitive color-changing materials is not good and the application range is small

Method used

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  • Humidity-sensitive color-changing microcapsule and preparation method and application thereof
  • Humidity-sensitive color-changing microcapsule and preparation method and application thereof
  • Humidity-sensitive color-changing microcapsule and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Preparation of a moisture-sensitive color-changing microcapsule: Calculated according to the mass ratio of organic solvent: anthocyanin: emulsifier: color developer: accelerator: 10:1:0.5:0.3:0.3, add 1g to a 50ml beaker Dissolve anthocyanins, 0.5g sodium dodecylbenzenesulfonate, 0.3g sodium carbonate, and 0.3g ascorbic acid in 10g of absolute ethanol, then transfer to a three-necked flask, stir at 70°C and 150r / min for 1h to obtain anhydrous Ethanol / anthocyanin mixture. Take 10ml of the mixed solution, add 12ml of tetraethyl orthosilicate and 6ml of KH550 drop by drop, add diethanolamine to make the pH = 9, stir and react at 70°C and 150r / min for 1.5h, after completion, uniformly dispersed microcapsule suspension can be obtained liquid. The prepared microcapsule suspension was distilled off under reduced pressure to remove the solvent, and dried at 50°C for 12h to obtain anthocyanin / SiO 2 Microcapsules.

[0035] A moisture-sensitive color-changing microca...

Embodiment 2

[0037] Example 2: Calculated according to the mass ratio of organic solvent: anthocyanin: emulsifier: color developer: accelerator 20: 2: 0.6: 0.4: 0.4, add 2g anthocyanin, 0.6g Tween 80 to a 50ml beaker , 0.4g of sodium bicarbonate, and 0.4g of glycerin were dissolved in 20g of dichloromethane, then transferred to a three-necked flask, and stirred at 75°C and 300r / min for 2h to obtain a mixture of dichloromethane / anthocyanins. Take 10ml of the mixed solution, add 20ml of tetraethyl orthosilicate and 8ml of KH560 drop by drop, add triethanolamine to make the pH = 9, stir and react at 75°C and 300r / min for 2.5h, after completion, uniformly dispersed microcapsule suspension can be obtained liquid. The prepared microcapsule suspension was distilled off under reduced pressure to remove the solvent, and dried at 50°C for 12h to obtain anthocyanin / SiO 2 Microcapsules.

[0038] A moisture-sensitive color-changing microcapsule fabric printing process: weighing anthocyanin / SiO in a 50m...

Embodiment 3

[0039] Example 3: Calculated according to the mass ratio of organic solvent: anthocyanin: emulsifier: developer: accelerator: 15: 1.5: 0.55: 0.35: 0.35, add 1.5g anthocyanin and 0.55g Span to a 50ml beaker 80. Dissolve 0.35g of sodium carbonate and 0.35g of glycerin in 15g of absolute ethanol, then transfer to a three-necked flask, and stir at 75°C and 200r / min for 1.5h to obtain a mixture of absolute ethanol / anthocyanin. Take 10ml of the mixed solution and add 15ml of tetraethyl orthosilicate and 7ml of KH550 dropwise, add diethanolamine to make the pH = 9, stir at 70°C at 200r / min for 1.8h, and a uniformly dispersed microcapsule suspension can be obtained after completion. The prepared microcapsule suspension was distilled off under reduced pressure to remove the solvent, and dried at 50°C for 12h to obtain anthocyanin / SiO 2 Microcapsules.

[0040] A moisture-sensitive color-changing microcapsule fabric printing process: weighing anthocyanin / SiO in a 50ml beaker 2 Mix 3.5g...

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Abstract

The invention discloses a humidity-sensitive color-changing microcapsule and a preparation method. The preparation method comprises the following steps: step 1, weighing 20-40 parts by mass of anthocyanidin, 10-12 parts by mass of an emulsifier, 6-8 parts by mass of a color developing agent and 6-8 parts by mass of an accelerant, dissolving the weighed materials in an organic solvent, and stirring the materials at 70-75 DEG C and 150-300 r / min for 1-2 h to obtain an organic solvent / anthocyanidin mixed solution; step 2, dropwise adding a certain amount of tetraethyl orthosilicate and a silane coupling agent into the mixed solution in the step 1, adding a reagent for adjusting the pH value to enable the pH value to be 9, and stirring and reacting at 70-75 DEG C and 150-300r / min for 1.5-2.5 hours so as to obtain a uniformly dispersed microcapsule suspension; and step 3, removing the solvent from the microcapsule suspension prepared in the step 2 through reduced pressure distillation, and drying at 50 DEG C for 12 hours to obtain the anthocyanin / SiO2 microcapsule. The humidity-sensitive color-changing microcapsule wall material has a porous structure and a hydrophilic material, and is printed on a fabric in a screen printing manner, and the fabric is sensitive in color change when meeting humidity, high in reversible resilience and reusable.

Description

technical field [0001] The invention belongs to the printing technology and the technical field of fabric printing. Background technique [0002] In recent years, the preparation and application of microcapsule phase change materials have become a hotspot in heat storage research. A microcapsule is a tiny container with a "core-shell" structure formed by coating a dispersed solid, liquid or gas with a film-forming material. The coating film formed by the film-forming material is usually called a wall material or a capsule wall (generally Formed from natural or synthetic polymer materials), the material coated inside the film-forming material is called the core material or capsule core. Although the use of polymer materials to coat phase change materials can prevent its leakage, the mechanical properties of organic polymer wall materials are low, and the encapsulation effect is not as good as that of inorganic materials. Therefore, the use of inorganic materials to coat phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/16D06P1/00
CPCB01J13/16D06P1/0016
Inventor 殷允杰张苏文陈重宇王潮霞张金菊曾红伟
Owner JIANGNAN UNIV
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