Preparation method and application of water-soluble natural pigment microcapsule

A natural pigment, water-soluble technology, applied in natural dyes, chemical instruments and methods, azo dyes, etc., can solve the problems of losing color rendering ability, affecting color fastness, etc., and achieve energy saving, environmental protection, color fastness, and bright colors. , good weather resistance effect

Active Publication Date: 2018-05-04
ZHONGYUAN ENGINEERING COLLEGE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because some natural pigments are relatively lively and chemically reactive, light and heat can promote their oxidative decomposition and lose their color rendering ability, which seriously affects the color fastness of coloring. The need for large-scale promotion in other fields needs to be resolved urgently

Method used

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  • Preparation method and application of water-soluble natural pigment microcapsule

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing water-soluble natural pigment microcapsules, comprising the following steps: adding 90mL of water, 1g of gardenia blue pigment, 0.6g of Span60, and 0.4g of Tween80 into a three-necked flask with a capacity of 250mL, heating up to 65°C at 400r / min Stir for 20 minutes to obtain a gardenia blue pigment microemulsion, add dropwise 4 g of methyl methacrylate, add 0.05 g of benzoyl peroxide, and react at a constant temperature of 80 ° C for 2 h. Then 1 g of acrylamide was added dropwise and reacted at a constant temperature of 80° C. for 3 hours to obtain gardenia blue pigment microcapsules with an average particle size of 6.331 μm.

Embodiment 2

[0027] A preparation method of water-soluble natural pigment microcapsules, comprising the following steps: adding 60mL of water, 2g of Suaeda sweet red pigment, 0.3g of Span60, 0.2g of Tween80 into a three-necked flask with a capacity of 250mL, heating up to 70°C at 500r / m Stir for 20 min to obtain Suaeda sweet red pigment microemulsion, add dropwise 4 g of methyl methacrylate, add 0.08 g of azobisisobutyronitrile, and react at a constant temperature of 85 ° C for 3 h. Add 2 g of acrylic acid dropwise, and react at a constant temperature of 85° C. for 3 hours to obtain Suaeda sweet red pigment microcapsules with an average particle size of 2.562 μm.

Embodiment 3

[0029] A method for preparing water-soluble natural pigment microcapsules, comprising the following steps: adding 80mL of water, 1.5g of chrysanthemum yellow, 0.6 span80 and 0.4 tween60 to a three-necked flask with a capacity of 250mL, heating up to 60°C and stirring at 600r / min for 10min To obtain a chrysanthemum yellow pigment microemulsion, add 4 g of methyl methacrylate dropwise, add 0.07 g of benzoyl peroxide, and react at a constant temperature of 80° C. for 2 h. Add 2 g of acrylic acid dropwise and react at a constant temperature of 80°C for 2 hours to obtain chrysanthemum yellow pigment microcapsules with an average particle size of 1.164 μm.

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Abstract

The invention discloses a preparation method of a water-soluble natural pigment microcapsule. The preparation method comprises the following steps: with methyl methacrylate and acrylic acid or acrylamide as a wall material and a water-soluble natural pigment as a core material, adding an emulsifying agent and an initiator, mixing at a certain condition to prepare an emulsion, and carrying out polymerization, so as to obtain the microcapsule. The preparation method has the beneficial effects that the preparation process is environment-friendly, the operation is simple and convenient, and the prepared microcapsule is excellent in stability, acid-base resistance and light resistance and can be used as color paste to be applied to the field of textile.

Description

technical field [0001] The invention belongs to the technical field of textile raw materials, and in particular relates to a preparation method and application of water-soluble natural pigment microcapsules. Background technique [0002] Natural pigments generally come from animal and plant tissues, so generally speaking, they are relatively safe for human health. Some natural pigments are themselves a kind of nutrient, which has nutritional effects, and some of them also have certain pharmacological effects. Natural pigments can also better imitate the color of natural objects, and the color tone is more natural when colored. However, because it is extracted from natural products, it is sometimes affected by its coexisting components or has peculiar smell itself, and the concentration of pigments is generally small, and the dyeing property is poor. Some natural food coloring agents even have chemical reactions with food raw materials. It changes color due to reaction, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B61/00C09B67/02
CPCC09B61/00C09B67/0097
Inventor 郑瑾王帅王杨柳焦明立张晓莉刘凡
Owner ZHONGYUAN ENGINEERING COLLEGE
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