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Photochromic nano composite microsphere and application thereof

A photochromic and nano-composite technology, applied in the direction of color-changing fluorescent materials, optics, optical components, etc., can solve the problems of shrinking color-changing coating space, reduced color-changing space, and low color-changing efficiency

Active Publication Date: 2018-04-13
JIANGSU SHIKEXINCAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spin coating method is to add the prepared discoloration solution into the tank of the spin coater after the substrate is made, and after fully mixing, fix the substrate on the spin coater for centrifugal rotation and solidify it to form a discoloration effect. Compared with the substrate method, the spin-coating method has the advantage of high technical content. In theory, any product can be made, and the color difference of the product is small. The disadvantage is that the space of the color-changing coating is relatively reduced, and the color-changing space is reduced. Therefore, the development of lens coating technology with high photochromic efficiency is an important development direction in the future

Method used

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  • Photochromic nano composite microsphere and application thereof
  • Photochromic nano composite microsphere and application thereof
  • Photochromic nano composite microsphere and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1: Preparation of photochromic nanocomposite microspheres, photochromic coating liquid and photochromic lens

[0077] (1) Preparation of photochromic nanocomposite microspheres:

[0078] (1) Add 9.7g of zinc nitrate hexahydrate to 1600g of ethylene glycol, stir evenly, add 1.6g of sublimated sulfur powder, heat up to 150°C for 24 hours, cool to 55°C, add 85g of mercaptoethanol dropwise and stir; Then add 6.7 g of the spiropyran photochromic compound represented by formula III, stir vigorously for 30 minutes, continue to cool to room temperature, filter and wash the precipitate, and dry it in a vacuum oven at 65°C for 8 hours to obtain spiropyran coating Zinc sulfide nanospheres;

[0079] (2) Add 8g of spiropyran-coated zinc sulfide nanospheres and 8.2g of diphenylmethane-4,4'-diisocyanate (MDI) to 1000g of butyl acetate solvent, stir well, and then add 7g to mix the reaction agent (1.2g n-butanol, 5.8g polytetrahydrofuran ether glycol), 18g Tween80, the tem...

Embodiment 2

[0094] (1) Preparation of photochromic nanocomposite microspheres:

[0095] (1) Add 6.5g of zinc nitrate to 1600g of ethylene glycol, stir evenly, add 1.7g of sublimated sulfur powder, heat up to 150°C for 24 hours, cool to 55°C, add 70g of mercaptoethanol dropwise and stir; then add 3.5 g of spiropyran photochromic compound (I), vigorously stirred for 30 minutes, cooled to room temperature, filtered and washed the precipitate, and dried in a vacuum oven at 65° C. for 8 hours to obtain spiropyran-coated zinc sulfide nanospheres;

[0096] (2) Get 5.5g spiropyran-coated zinc sulfide nanospheres, 5g MDI is added in 1000g butyl acetate solvent, after stirring evenly, add 5.5g mixed reactants (1.0g n-butanol, 4.5g polytetrahydrofuran ether) Diol), 20g Tween80, keep the temperature at 25°C, prepolymerize at 500r / min for 50min, add 6g chain extender (4.5g ethylene glycol, 1.5g ethylenediamine), 0.1g DBTL, heat to 65°C Polymerization chain extension reaction was carried out for 15 mi...

Embodiment 3

[0105] (1) Preparation of photochromic nanocomposite microspheres:

[0106] (1) Add 11g of zinc nitrate hexahydrate to 1600g of ethylene glycol, stir evenly, add 3g of sulfur powder, heat up to 145°C for 24 hours, cool to 50°C, add 92g of mercaptoethanol dropwise and stir; then add 8g The spiropyran photochromic compound (I), vigorously stirred for 35 minutes, continued to cool to room temperature, filtered and washed the precipitate, and dried in a vacuum oven at 60°C for 9 hours to obtain spiropyran-coated zinc sulfide nanospheres;

[0107] (2) Get 10g spiropyran-coated zinc sulfide nanospheres, 10.8g m-xylylene diisocyanate (XDI) and join in 1000g butyl acetate solvent, after stirring evenly, add 7.4g mixed reaction agent (1.0 g n-butanol, 6.4g polytetrahydrofuran ether glycol), 16g Tween80, keep the temperature at 25°C, prepolymerize at 600r / min for 60min, add 8g chain extender (5.5g ethylene glycol, 2.5g ethylenediamine) , 0.2g DBTL, heated to 60°C for polymerization cha...

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Abstract

The invention discloses a photochromic nano composite microsphere and an application thereof. The photochromic composite microsphere has a three-layer composite core-shell structure, an inner core isa zinc sulfide mesoporous nano microsphere, a middle layer is a photochromic layer formed by a spiropyran compound, and an outer layer is polyurethane; and the outer diameter of the composite microsphere is 50-350nm, wherein the diameter of the zinc sulfide mesoporous nanosphere is 30-250nm, the thickness of the middle layer is 5-25nm, and the thickness of the outer shell is 5-25nm. The photochromic composite microsphere provided by the invention can be used to prepare a photochromic coating or doped into a resin optical material to prepare a photochromic material. The material can be changedfrom colorless to colored under the irradiation of ultraviolet rays, and after the ultraviolet rays disappear, the material can be quickly faded into colorless, and has the advantages of strong fatigue resistance, good stability, a fast color change speed and the like.

Description

technical field [0001] The invention belongs to the technical field of photochromism, and in particular relates to a photochromic nanocomposite microsphere used in optical materials and an application thereof. Background technique [0002] Photochromism refers to certain compounds under the action of light of a certain wavelength and intensity, as the absorption spectrum changes, the molecular structure of the material changes, resulting in a change in the absorbance and color of the material, and this change is generally reversible , a functional material that can automatically return to its original state when the light is stopped, as a new material in the subdivision of optical materials, it has important roles in high-tech fields such as optical lenses, optical information storage, molecular switches, and anti-counterfeiting identification. Value. It has been more than 100 years since human beings discovered the phenomenon of photochromism. The first successful commerc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/02C09D5/29G02B1/04G02C7/10
CPCC09D5/29C09K9/02C09K2211/1029C09K2211/1088G02B1/04G02C7/102
Inventor 王明华乔振安张鹤军纪立军范为正张倩司云凤王志飞刘洋薛晓花吴潇郑永华
Owner JIANGSU SHIKEXINCAI CO LTD
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