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A photochromic microcapsule with controllable response time and its preparation method and application

A photochromic and response time technology, applied in microcapsule preparations, microsphere preparation, color-changing fluorescent materials, etc., to achieve the effect of expanding the scope of application

Active Publication Date: 2019-10-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there have been a lot of researches on the technology of synthesizing photochromic microcapsules, but there are few reports on photochromic microcapsules with controllable response time.

Method used

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  • A photochromic microcapsule with controllable response time and its preparation method and application
  • A photochromic microcapsule with controllable response time and its preparation method and application
  • A photochromic microcapsule with controllable response time and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A photochromic microcapsule with controllable response time, the preparation method of which is as follows:

[0049] (1) Add carboxyspiropyran, bisphenol A, and tetradecyl alcohol into a three-neck flask according to the mass ratio of 1:1:100 and mix them, heat up to 40°C, stir and react for 90 minutes at a speed of 200r / min, and then make a reversible photochromic Dye complexes.

[0050] (2) Add formaldehyde and urea into a three-necked flask at a mass ratio of 1:1 and mix, adjust the pH of the solution to 8 with a triethanolamine solution, then raise the temperature to 70°C, stir and keep warm at a speed of 300r / min for 1 hour, and add 1 volume deionized water to obtain urea-formaldehyde prepolymer.

[0051](3) Take 5.625 g of the reversible photochromic compound made in step (1) and 22.5 g of urea-formaldehyde prepolymer obtained in step (2) and mix them in a three-necked flask, and adjust the temperature of the mixture with ammonium chloride solution. When the pH ...

Embodiment 2

[0054] (1) Add carboxyspiropyran, bisphenol A, and tetradecyl alcohol into a three-neck flask according to the mass ratio of 1:20:100 and mix them, heat up to 80°C, stir and react at a speed of 200r / min for 90min, and then make a reversible photochromic Dye complexes.

[0055] (2) Add formaldehyde and urea into a three-necked flask and mix them according to the mass ratio of 10:1, adjust the pH of the solution to 8 with triethanolamine solution, then raise the temperature to 70°C, stir and keep warm at a speed of 300r / min for 1h, and add 100 times the volume deionized water to obtain urea-formaldehyde prepolymer.

[0056] (3) Take 1 g of the reversible photochromic compound prepared in step (1) and 100 g of the urea-formaldehyde prepolymer obtained in step (2) and mix them in a three-necked flask, and adjust the pH value of the mixture with ammonium chloride solution to 2, and then emulsified under an emulsifier with a rotating speed of 3000r / min. During the emulsification pr...

Embodiment 3

[0059] (1) Add carboxyspiropyran, bisphenol A, and tetradecyl alcohol into a three-necked flask according to the mass ratio of 1:4:40 and mix them, heat up to 90°C, stir and react for 150 minutes at a speed of 200r / min, and then make a reversible photochromic Dye complexes.

[0060] (2) Add formaldehyde and urea into a three-necked flask according to the mass ratio of 20:1 and mix them, adjust the pH of the solution to 8 with triethanolamine solution, then raise the temperature to 70°C, stir and keep warm at a speed of 300r / min for 1 hour, and add 5 times the volume deionized water to obtain urea-formaldehyde prepolymer.

[0061] (3) Take 5.625 g of the reversible photochromic compound made in step (1) and 33.75 g of urea-formaldehyde prepolymer obtained in step (2) and mix them in a three-necked flask, and adjust the temperature of the mixture with ammonium trichloride solution. When the pH value reaches 4, emulsify under an emulsifier with a rotational speed of 14000r / min, ...

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Abstract

The invention relates to a photochromic microcapsule with controllable response time, as well as a preparation method and application thereof. The preparation method comprises the following steps of (1) after uniformly mixing carboxyl spiropyran, bisphenol A and tetradecyl alcohol , and carrying out stirring reaction at 40 to 90 DEG C to obtain a reversible photochromism dye compound; (2) after uniformly mixing formaldehyde and urea, adjusting pH to be 7 to 9, then carrying out stirring reaction at 60 to 80 DEG C, and adding water to obtain a urea-formaldehyde prepolymer; (3) after uniformly mixing the reversible photochromism dye compound prepared in the step (1) and the urea-formaldehyde prepolymer prepared in the step (2), adjusting pH to be 2 to 5, adding an emulsifier for emulsifying,and vacuum drying to obtain the photochromic microcapsule with controllable response time. The photochromic microcapsule with controllable response time provided by the invention has the characteristic of controllability of photochromic recovery time length, and can be applied to the fields such as counterfeiting prevention and textiles.

Description

technical field [0001] The invention belongs to the technical field of microcapsule preparation, in particular to a photochromic microcapsule with controllable response time, a preparation method and application thereof. Background technique [0002] Microcapsules are tiny containers made of natural or synthetic polymers. Microcapsule technology includes the preparation technology and application technology of microcapsules, that is, using specific methods and specific equipment to make polymer materials encapsulate drugs, coatings and reaction reagents to make microcapsules, and then pass the prepared microcapsules through Some other processes, and then made into products with excellent characteristics. Broadly speaking, microcapsules have the ability to improve and enhance the appearance and properties of substances. More precisely, microcapsules are able to store substances in a microscopic state and release them when needed. Microcapsules can also change the color, sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K9/02B01J13/18
Inventor 王斌贾剑陈克复李金鹏
Owner SOUTH CHINA UNIV OF TECH