Method for preparing nano fluorescent pigment dispersion

A pigment dispersion and nano-fluorescence technology, applied in the direction of organic dyes, etc., can solve the problems of poor storage stability, uneven particle size distribution of fluorescent pigment paste, easy precipitation, etc., to achieve small particle size, avoid stability decline, and not easy Precipitation effect

Inactive Publication Date: 2015-01-07
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional method of preparing nano-fluorescent pigment dispersion is to sand-mill the powdered fluorescent pigment first, disperse it into nanoscale, and then adjust it into a color paste. However, the particle size distribution of the fluorescent pigment color paste prepared by this method is uneven, easy to precipitate, and stable in storage. poor sex

Method used

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  • Method for preparing nano fluorescent pigment dispersion
  • Method for preparing nano fluorescent pigment dispersion
  • Method for preparing nano fluorescent pigment dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 0.2 g of 11-methacryloyloxy sodium undecyl sulfate in 83.1 g of deionized water and stir until completely dissolved to obtain an aqueous phase. Take 0.1g of Fluorescent Yellow 8G in a mixed solution of 5g of styrene, 5g of methyl methacrylate and 1g of acetone, heat and stir until completely dissolved, add 0.5g of hexadecane to obtain an oil phase, and stir at a speed of 1000r / min The oil phase was added dropwise to the water phase in a device, treated in a high-speed emulsifier for 30 minutes, and then placed in an ultrasonic cell pulverizer for ultrasonic treatment in an ice-water bath for 15 minutes to obtain a fine emulsion. Transfer the fine emulsion into the reaction kettle, bring the temperature up to 80°C, slowly add ammonium persulfate (0.1g dissolved in 5g of water) dropwise, keep the reaction for 3 hours, take it out, cool to room temperature, filter with 500nm microporous filter paper to remove impurities, and then adding sodium bicarbonate to adjust th...

Embodiment 2

[0028] Take 0.3 g of sodium propyl tetradecyl maleate sulfonate in 71.5 g of deionized water, and stir until completely dissolved to obtain an aqueous phase. Take 0.1g of Fluorescent Red 5B in a mixed solution of 15g of butadiene, 5g of methyl methacrylate and 2.5g of acetone, heat until it is completely dissolved, add 0.5g of cetyl alcohol to obtain an oil phase, and heat it at a speed of 1000r / min The oil phase was added dropwise to the water phase in a stirrer, treated in a high-speed emulsifier for 30 minutes, and then placed in an ultrasonic cell pulverizer for ultrasonic treatment in an ice-water bath for 15 minutes to obtain a fine emulsion. Transfer the fine emulsion into the reaction kettle, bring the temperature up to 80°C, slowly add ammonium persulfate (0.1g dissolved in 5g of water) dropwise, keep the reaction for 3 hours, take it out, cool to room temperature, filter with 500nm microporous filter paper to remove impurities, and then adding sodium bicarbonate to a...

Embodiment 3

[0030] Take 1.2 g of 11-crotonyloxy sodium undecyl sulfate in 55.6 g of deionized water, stir until completely dissolved, and obtain an aqueous phase. Take 0.9g fluorescent yellow 8G in 20g dicyclopentadiene, 10g butyl methacrylate and 6g propanol mixed solution, heat until completely dissolved, add 1g hexadecane to obtain oil phase The oil phase was added dropwise to the water phase in a stirrer, treated in a high-speed emulsifier for 40 minutes, and then placed in an ultrasonic cell pulverizer for ultrasonic treatment in an ice-water bath for 20 minutes to obtain a fine emulsion. Transfer the fine emulsion into the reaction kettle, bring the temperature up to 80°C, slowly add ammonium persulfate (0.3g dissolved in 5g water) dropwise, keep the reaction for 3 hours, take it out, cool to room temperature, filter with 500nm microporous filter paper to remove impurities, and then adding sodium bicarbonate to adjust the pH to 7-8 to obtain nano fluorescent pigment dispersion.

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Abstract

The invention discloses a method for preparing a nano fluorescent pigment dispersion, and belongs to the field of fine chemical engineering. Through four processes of pre-emulsification, fine emulsification, induced polymerization and post-treatment, a polymerizable surfactant is adopted as an emulsifier; and due to addition of a cosolvent, the solubility of a fluorescent pigment is increased, so as to prepare the nano fluorescent pigment dispersion which is high in tinting strength and good in stability. The nano fluorescent pigment dispersion prepared by the method has the characteristics of being small in particle size, even in distribution, not easy to participate, high in fluorescence intensity and the like, and overcomes the defects of high energy consumption, serious contamination and insufficient product stability in conventional grinding.

Description

technical field [0001] The invention relates to a method for preparing a nano fluorescent pigment dispersion, which belongs to the field of fine chemical industry. Background technique [0002] Fluorescent pigments were commercially produced in the 1840s and were mainly used in paints, printing inks and plastics. With the improvement of people's living standards, the choice of commodities not only considers the use function, but also the appearance of the article. In terms of color brilliance, fluorescent pigments rank first. Now the scope of use of fluorescent pigments has been extended to safety signs, anti-counterfeiting, children's toys, plastics, printing and dyeing, coatings, textiles, packaging and other fields. Commercial fluorescent pigments are mostly in powder form. The synthesis process is generally to synthesize resin first, then disperse the fluorescent dye in the resin, and then commercialize it through crushing and other processes. The particle size distribu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/14C08F220/38C08F222/24C08F236/06C08F236/08C08F232/08C08F220/18C08F2/26C08F2/44C09B67/40D06P1/52
Inventor 付少海张丽平刘杰田安丽谭莹
Owner JIANGNAN UNIV
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