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A kind of fluorescent microsphere and its preparation method and application

A technology of fluorescent microspheres and fluorescence, applied in the field of polymers, can solve problems such as low production efficiency, gelation, and weak barrier effect

Active Publication Date: 2018-08-17
GUANGZHOU SHINE POLYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the production efficiency is not high. If the amount of catalyst and water is not greatly increased, it will be difficult to prepare particles smaller than 2 microns with this preparation method
Another disadvantage is that it is difficult to control the reaction operation. Because the barrier effect between particles is not strong under stirring, it is easy to stick during the reaction, resulting in irregular particles and even gelation.

Method used

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  • A kind of fluorescent microsphere and its preparation method and application
  • A kind of fluorescent microsphere and its preparation method and application
  • A kind of fluorescent microsphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] (1) According to the molar ratio, mix 0.25mol of 3-aminopropyltriethoxysilane and 0.21mol of the chemical formula:

[0123]

[0124] After mixing, 4 mol of ethanol was added, the temperature was raised to 80°C, and the mixture was stirred for 4 hours, and the low boilers were removed by vacuum to obtain a light yellow liquid. Its reaction process can be represented by the following formula:

[0125] +

[0126] +HCl

[0127] (2) At 25°C, add 1.12mol of methyltriethoxysilane, 0.04mol of dimethyldimethoxysilane and 0.035mol of tetramethoxysilane to a solution containing 11.2mol of deionized water and 0.001mol of hydrochloric acid In the reaction kettle, adiabatic reaction was carried out under stirring for 4 hours to obtain a transparent homogeneous hydrolyzate.

[0128] (3) Mix the solution obtained in step (1) and the solution obtained in step (2) evenly, cool down to 20°C, add 0.5mol methyl cellulose and 0.005mol sodium dodecylsulfonate, and stir after th...

Embodiment 2

[0133] (1) In molar ratio, mix 0.15mol of N-(2-aminoethyl)-3-aminopropyltriethoxysilane and 0.13mol of the chemical formula

[0134]

[0135] After mixing, 6 mol of ethanol was added, the temperature was raised to 80°C, and the mixture was stirred for 4 hours, and the low boilers were removed by vacuum to obtain a yellow liquid. Its reaction process can be represented by the following formula:

[0136] +

[0137] +HCl

[0138] (2) At 35°C, add 1 mol of methyltriethoxysilane, 0.04 mol of dimethyldimethoxysilane and 0.01 mol of tetramethoxysilane to a reaction kettle containing 20 mol of deionized water and 0.001 mol of hydrochloric acid , Adiabatic reaction under stirring for 3 hours, a transparent homogeneous hydrolyzate was obtained.

[0139] (3) Mix the solution obtained in step (1) and the solution obtained in step (2) evenly, cool down to 15°C, add 0.5mol methyl cellulose and 0.005mol sodium dodecylsulfonate, and stir after they are uniformly dispersed Add ...

Embodiment 3

[0143] (1) In molar ratio, mix 0.006mol of 3-aminopropyltriethoxysilane and 0.005mol of chemical formula

[0144]

[0145] After mixing, add 6 mol of ethanol, raise the temperature to 80°C, and react for 4 hours under stirring, and remove the low boilers by vacuum to obtain a light yellow liquid. The sample was tested by FT-IR spectroscopy (KBr tablet method), and its structural formula is:

[0146]

[0147] (2) At 25°C, add 1mol methyltrimethoxysilane, 0.05mol dimethyldimethoxysilane and 0.1mol tetraethoxysilane to a reaction kettle containing 40mol deionized water and 0.001mol hydrochloric acid , Adiabatic reaction under stirring for 4 hours, a transparent homogeneous hydrolyzate was obtained.

[0148] (3) Mix the solution obtained in step (1) and the solution obtained in step (2) evenly, cool down to 15°C, add 0.5 g of polyvinyl alcohol and 0.05 g of sodium dodecylsulfonate, and after they are uniformly dispersed, add them under stirring 2 grams of ammonia water wit...

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Abstract

The invention relates to a fluorescent microsphere and its preparation method. Particle size of the fluorescent microsphere is within the range of 0.1-10 micrometer. The fluorescent microsphere has good sphericity and narrow particle size distribution and also has fluorescent brightening groups. The fluorescent brightening groups are uniformly or randomly distributed in a polysiloxane microsphere or on the surface of the polysiloxane microsphere such that the polysiloxane microsphere has a fluorescent brightening effect, has high light fastness, has excellent heat resistance and high chemical stability, can absorb ultraviolet rays to prevent aging of a product, is especially suitable for an originally yellowish product, endows a product with bright white appearance, can make a colored product more dazzlingly beautiful when used in the colored product, and can enhance brightness of a product when used in a black product. The invention, on the other hand, provides a preparation method of the above fluorescent microsphere and a prepared photodiffusion material.

Description

technical field [0001] The invention relates to the field of macromolecules, in particular to polysiloxane microspheres which are spherical, have a very narrow particle size distribution, and have fluorescent whitening effects and a preparation method thereof. Background technique [0002] Silicone resin has good thermal stability and low photorefractive index, and can prepare polysiloxane microspheres with true spherical shape and different particle size distribution characteristics through different preparation processes, which are widely used in plastics, rubber, cosmetics and modified additives for inks. In the plastic industry, it can be used as a light diffusing agent to improve the light scattering performance, flame retardancy, impact resistance and sliding properties of transparent plastic products. However, in the existing processing technology, in order to improve the appearance or anti-ultraviolet performance of the product, additional fluorescent whitening agen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C08G77/26C08L69/00C08L83/08B01J13/14
Inventor 肖晗韩泽明石建伟
Owner GUANGZHOU SHINE POLYMER TECH
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