Photochromic micro-nano capsule with solid capsule core and preparation method of photochromic micro-nano capsule

A technology for capsule preparation and capsule core, which is applied in the field of photochromic micro-nano capsules and its preparation, can solve the problems of difficult durability of weather resistance and photo-changeability, limited application occasions, and no protection treatment, and achieves improved thermal stability. , The effect of improving the discoloration performance and prolonging the weather resistance

Inactive Publication Date: 2018-03-23
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photochromic material solution in the state of emulsion is not protected, its weather resistance and light change performance are difficult to last, and its application will be limited

Method used

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  • Photochromic micro-nano capsule with solid capsule core and preparation method of photochromic micro-nano capsule
  • Photochromic micro-nano capsule with solid capsule core and preparation method of photochromic micro-nano capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025]Dissolve 2g of polylactic acid, 1g of spirooxazine organic photochromic dye, 0.5g of dibutyl hydroxytoluene, 0.3g of 2-hydroxy-4-n-octyloxybenzophenone and 0.3g of phenyl 1-hydroxy-2-naphthoate in 20g of ethyl acetate, and then added to 200g of 2wt% sodium polyacrylate copolymer aqueous solution, while adding 2g of n-amyl alcohol, and emulsified at a high speed of 5000rpm for 10min to obtain a stable oil-in-water emulsion. The particle size was measured to be 1-5 microns by optical microscope observation. The above-mentioned oil-in-water emulsion was transferred to a three-necked flask, and the pH of the emulsion was adjusted to 4, and the temperature was set to 50°C. Weigh 10g of partially methylated melamine-formaldehyde prepolymer and dilute it with 5g of distilled water to form a homogeneous solution, and add it dropwise into the homogeneous emulsion with a peristaltic pump while stirring at a speed of 350rpm. Suspension of micro-nanocapsules in liquid capsule core. ...

Embodiment 2

[0028] With 1kg thermoplastic polyurethane, 1kg spiropyran organic photochromic dye, 60g tert-butyl hydroquinone, 50g resorcinol monobenzoate and 30g dibenzyl oxalate are dissolved in 20kg toluene, then join in In 100kg sodium lauryl sulfate solution, wherein containing sodium lauryl sulfate 1kg, n-octanol 1kg, Tween 60 consumption 2kg, high-speed emulsification 60min under 9000rpm rotating speed, after making stable oil-in-water emulsion, The particle size of the emulsion droplet was observed and measured by an optical microscope to be 2-15 microns. The above-mentioned oil-in-water emulsion was transferred to a three-necked flask, and the pH of the emulsion was adjusted to 4.9, and the temperature was set to 50°C. Weigh 5kg of butylated melamine formaldehyde prepolymer and dilute it with 5kg of distilled water to form a homogeneous solution, and add it dropwise into the homogeneous emulsion with a peristaltic pump while stirring at a speed of 1000rpm. Suspension of micro-nano...

Embodiment 3

[0030] 20g of polybutylene terephthalate, 10g of 2,2-di(4-formylphenyl)naphthopyran, 0.3g of dibutylhydroxytoluene, 0.5g of 2-hydroxy-4-n-octyloxydi Dissolve benzophenone and 0.1g of 1-hydroxy-2-phenyl naphthoate in 50g of chloroform, then add to 500g of 5wt% polyacrylamide aqueous solution, and emulsify at a high speed of 10000rpm for 15min to obtain a stable oil-in-water emulsion Finally, the emulsion droplet was measured to be 0.5-5 microns by optical microscope observation, and the above-mentioned oil-in-water emulsion was transferred to a three-necked flask, and the pH of the emulsion was adjusted to 6, and the temperature was set to 30°C. Weigh 100g of phenolic resin prepolymer solution and add it dropwise into the homogeneous emulsion while stirring at a speed of 1000rpm. After dropping, the temperature is raised to 60°C and kept for 120min to obtain a suspension of micro-nanocapsules with liquid capsule cores. The suspension was suction filtered and washed to obtain a ...

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Abstract

The invention discloses a photochromic micro-nano capsule with solid capsule core and a preparation method of the photochromic micro-nano capsule. The photochromic micro-nano capsule is characterizedby using a solid photochromic composite material as the capsule core. The preparation method includes steps of 1), swelling and dissolving polymer, photochromic dye, an antioxidant, an ultraviolet light absorber and a sensitizer in an oil-soluble solvent to obtain an oil phase, adding into a water solution containing an emulsifier and a co-emulsifier, and performing shear emulsifying to obtain anoil-in-water type stable emulsion; 2), adjusting emulsion temperature to 30-70 DEG C, adjusting emulsion pH, and adding a proper amount of amino resin or etherification modified amino resin solution at constant speed; 3), heating to a certain temperature and keeping stirring to obtain the micro-nano capsule; 4), adjusting the pH value of the prepared micro-nano capsule suspension to be about 7, and performing suction filtration and washing; 5), drying and thermally treating the capsule. The photochromic micro-nano capsule and the preparation method thereof have the advantages that the thermalstability of the capsule reaches over 300 DEG C, the mechanical performance of the capsule is obviously improved, and the capsule is applicable to fields such as fiber processing, textile and garment,chemical printing and dyeing and plastic products; the preparation method is simple in process and capable of achieving industrial production.

Description

technical field [0001] The invention relates to a photochromic micro-nano capsule, in particular to a photochromic micro-nano capsule with a solid capsule core and a preparation method thereof. Background technique [0002] Photochromic material refers to a kind of intelligent material that can change color after being excited by a light source. It has been used more and more in many fields such as intelligent anti-counterfeiting, information storage, textile and clothing decoration, etc. If the photochromic dye is exposed to ultraviolet light, oxygen or free electrons for a long time, the chemical structure of the dye will inevitably change, which will cause the attenuation or instability of the color changing performance. A capsule is a tiny "container" with a core-shell structure wrapped around a capsule core by a wall material. The container can contain liquid or solid functional substances such as drugs, dyes, essences, and inks, which are used to protect or control the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02B01J13/20
CPCC09K9/02B01J13/206
Inventor 李伟王瑀耿晓叶霍晓楠边俊民
Owner TIANJIN POLYTECHNIC UNIV
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