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Gel preparation method of fluorescent pigment

A technology of fluorescent pigments and fluorescent dyes, applied in luminescent materials, pigment pastes, chemical instruments and methods, etc., can solve the problems of affecting product performance, easy to produce color bleeding, etc., to achieve difficult color bleeding, good acid and alkali resistance, The effect of strong adsorption

Inactive Publication Date: 2020-06-16
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the strong hydrophilicity of the polymer surface in the printing and dyeing and coating application process of fluorescent pigments prepared by emulsion polymerization in the prior art, and the dyes in the polymer are easy to dissolve into water or other media, thereby Affect the performance of the product, easy to produce problems such as bleeding, provide a gel preparation method for fluorescent pigments, adsorb fluorescent dye molecules through sodium alginate gel with strong adsorption force on dye molecules, and convert the gel layer into The inorganic salt protective layer further covers and fixes the dye molecules, improves the acid and alkali resistance of the protective layer, and the prepared fluorescent pigment is not easy to bleed, has strong acid and alkali resistance, and has good performance

Method used

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  • Gel preparation method of fluorescent pigment
  • Gel preparation method of fluorescent pigment

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A gel preparation method for fluorescent pigments, comprising the steps of:

[0028] (1) 50g smectite and 0.2g rhodamine B are mixed and ground to obtain mixed powder;

[0029] (2) Dissolve 10g of sodium alginate in 200mL of warm water at 50°C, stir at high speed until there are no massive aggregates in the liquid, then add the mixed powder into the slurry, and continue to stir evenly for 2 hours to obtain a mixed slurry;

[0030] (3) Add 5.5g calcium chloride anhydrous to the mixed slurry while stirring, gel flocs appear rapidly in the slurry, continue to stir until the flocs disappear, form a uniform gel, and obtain a gel intermediate;

[0031] (4) Add 5g of sodium carbonate to the gel intermediate, the color of the solution changes, stir until the color is uniform and then precipitate, wash the product without floating, then centrifugally dry and grind it into powder to obtain the fluorescent pigment.

Embodiment 2

[0033] A gel preparation method for fluorescent pigments, comprising the steps of:

[0034] (1) Mix and grind 50g kaolinite and 0.5g solvent yellow 172 to obtain mixed powder;

[0035] (2) Dissolve 20g of sodium alginate in 200mL of warm water at 50°C, stir at high speed until there are no massive aggregates in the liquid, then add the mixed powder into the slurry, and continue to stir evenly for 1 hour to obtain a mixed slurry;

[0036] (3) Add 11g of anhydrous calcium chloride to the mixed slurry while stirring, gel flocs appear rapidly in the slurry, continue to stir until the flocs disappear, form a uniform gel, and obtain a gel intermediate;

[0037] (4) Add 10 g of sodium carbonate to the gel intermediate, the color of the solution changes, stir until the color is uniform and then precipitate, wash the resulting product until there is no floating color, then centrifugally dry and grind it into powder to obtain the fluorescent pigment.

Embodiment 3

[0039] A gel preparation method for fluorescent pigments, comprising the steps of:

[0040] (1) 15g saponite, 35g montmorillonite and 0.15g rhodamine 6G are mixed and ground to obtain mixed powder;

[0041] (2) Dissolve 25g of sodium alginate in 350mL of warm water at 40°C, stir at high speed until there are no massive aggregates in the liquid, then add the mixed powder into the slurry, and continue stirring for 1 hour to obtain a mixed slurry;

[0042] (3) Add 6.5g calcium chloride anhydrous to the mixed slurry while stirring, gel flocs appear rapidly in the slurry, continue to stir until the flocs disappear, form a uniform gel, and obtain a gel intermediate;

[0043] (4) Add 6g of sodium carbonate to the gel intermediate, the color of the solution changes, stir until the color is uniform and then precipitate, wash the product obtained until there is no floating color, then centrifugally dry and grind it into powder to obtain the fluorescent pigment.

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Abstract

The invention relates to the technical field of fluorescent pigment preparation, and discloses a gel preparation method of fluorescent pigment which comprises the following steps: (1) mixing and grinding inorganic silicate and fluorescent dye to obtain mixed powder; (2) adding sodium alginate into water, stirring until the sodium alginate is completely dissolved, adding the mixed powder, and uniformly stirring to obtain mixed slurry; (3) adding anhydrous calcium chloride into the mixed slurry, and uniformly stirring to obtain a gel intermediate; and (4) adding sodium carbonate into the gel intermediate, performing uniform stirring and precipitating, washing the obtained product until no flooding exists, and drying the product to obtain the fluorescent pigment. Fluorescent dye molecules areadsorbed through sodium alginate gel, and the gel layer is converted into an inorganic salt protective layer, so that the fluorescent pigment is not prone to bleeding, has good acid and alkali resistance and is more stable.

Description

technical field [0001] The invention relates to the technical field of fluorescent pigment preparation, in particular to a method for preparing a fluorescent pigment gel. Background technique [0002] After the fluorescent pigment absorbs visible light and ultraviolet light, it can convert the ultraviolet light that the human eye cannot perceive into a certain color of visible light, which is superimposed with the conventional reflected light. The total reflected light intensity is higher than that of ordinary pigments, forming very bright colors. . And these fluorescent pigments are often inherently deficient in properties such as light resistance and solvent resistance, so they are generally fused into the framework of polymer materials by chemical or physical methods, and then further processed into pigments. [0003] At present, domestic environment-friendly fluorescent liquid pigments are generally produced by emulsion polymerization. For example, the "preparation meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D17/00C09B67/08C09K11/06
CPCC09B67/0013C09D17/003C09K11/06
Inventor 童东绅房凯杨海燕俞卫华周春晖
Owner ZHEJIANG UNIV OF TECH
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