Photochromic double-shell microcapsule and preparation method and application thereof

A photochromic and photochromic material technology, applied in the field of functional polymer material preparation, can solve problems such as poor coating effect and poor stability of single-layer coating layer, and achieve narrow gaps, improved heat resistance, and compact structure Effect

Active Publication Date: 2015-05-20
CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of photochromic material microcapsules with a single-layer coating layer in the prior art, the stability of the single-layer coating layer is poor, and the coating effect is poor, a photochromic double-shell microcapsule is provided, and further provides The preparation method and application of the photochromic double-shell microcapsules

Method used

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  • Photochromic double-shell microcapsule and preparation method and application thereof
  • Photochromic double-shell microcapsule and preparation method and application thereof
  • Photochromic double-shell microcapsule and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] (1) Weigh 0.5 g of single-shell microcapsules containing bacteriorhodopsin, dissolve them in a mixed solution of 10 mL of absolute ethanol and 1 mL of water, and stir for 0.5 hours to prepare a single-shell capsule dispersion for use;

[0049] (2) Measure 10mL of absolute ethanol and 0.50mL of tetrabutyl titanate, add glacial acetic acid to adjust the pH of the solution to 5, mix them in a beaker and stir for 0.5 hours to prepare a precursor dispersion for later use;

[0050] (3) Add the precursor dispersion prepared in step (2) dropwise to the dispersion of single-shell microcapsules prepared in step (1), control the temperature of the water bath to 40°C, and react for 2 hours, Vacuum suction filtration obtains desired reaction product;

[0051] (4) After washing and filtering the obtained product, put it in an oven and dry it at 60°C for 3 hours to obtain the outer shell of TiO 2 Coated rhodopsin double-shell microcapsules.

Embodiment 2

[0053] (1) Dissolve 5 g of single-shell microcapsules containing bacteriorhodopsin in a mixed solution of 60 mL of absolute ethanol and 1 mL of water, add ammonia water to adjust the pH to 9, and make the single-shell microcapsules of bacteriorhodopsin under nitrogen protection The microcapsules are uniformly dispersed in the solution to obtain the required single-shell microcapsule dispersion of bacteriorhodopsin;

[0054] (2) Mix 3mL vinyltriethoxysilane (VTES), 2mL tetraethyl orthosilicate (TEOS) and 10mL absolute ethanol to obtain a precursor dispersion for later use;

[0055] (3) At 60°C, add the precursor dispersion dropwise to the single-shell microcapsule dispersion of bacteriorhodopsin, keep it warm for 6 hours after the addition, and finally cool to room temperature and settle for 24 hours. Filtration to obtain the desired precipitate;

[0056] (4) After washing and filtering the precipitate obtained in step (5), vacuum-dry it at 60°C to obtain an outer shell of SiO...

Embodiment 3

[0058] (1) Add 5 g of single-shell microcapsules containing bacteriorhodopsin into 10 mL of deionized water, stir and mix evenly to obtain a single-shell microcapsule dispersion of bacteriorhodopsin;

[0059] (2) Prepare an aqueous solution of silane coupling agent KH-560 with a volume concentration of 6.0% according to the conventional method as the first precursor dispersion;

[0060] (3) Prepare 4g / L sodium silicate aqueous solution as the second precursor dispersion according to the conventional method;

[0061] (4) Evenly mix the microcapsule dispersion with 50ml of the first precursor dispersion, turn on the water bath to heat and control the reaction temperature to 60°C, slowly add 4g / L sodium silicate aqueous solution to it, and control the pH of the reaction system The value is around 9.3, and the stirring speed is continuously increased with the increase of the volume of the reaction system. When the pH of the system is 9, stop adding the sodium silicate aqueous solu...

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Abstract

The invention discloses a photochromic double-shell microcapsule and a preparation method and an application thereof. The photochromic double-shell microcapsule comprises an internal shell formed by a photochromic material and a shell body coating the internal shell, the shell body comprises an internal layer shell body formed by one or more of a polymer, long-chain saturated hydrocarbon and long chain saturated aliphatic acid, the shell body also comprises an external shell body covering external part of the internal layer shell body, the external shell body is a compact layer formed by one or more of a nonmetallic oxide, a metal oxide or salt of the metal oxide; the preparation method of the photochromic double-shell microcapsule is characterized in that the prepared single-shell microcapsule dispersion liquid is mixed and reacted to a prepared dispersion liquid of alcoxyl nonmetal, alcoxyl metal or a predecessor of metal salt, and the photochromic double-shell microcapsule is prepared by further processing. The photochromic double-shell microcapsule has hear resistance and chemical stability, and especially has stability to acid, alkali and an organic solvent.

Description

technical field [0001] The invention relates to a photochromic double-shell microcapsule, a preparation method and application thereof, and belongs to the technical field of preparation of functional polymer materials. Background technique [0002] Photochromism refers to the phenomenon that the color of a substance changes reversibly under the irradiation of light of appropriate wavelength. This color change can be restored naturally at room temperature when the excitation is removed or irradiated with light of a different wavelength, or it can also be restored thermally at elevated temperatures. Bacteriorhodopsin is a special photochromic protein with extremely high photosensitivity and light cycle times, which is much superior to photochromic synthetic materials. The protein smart ink based on bacteriorhodopsin is a kind of A new type of anti-counterfeiting material, which integrates photochromism, light storage and molecular tracking, is a new technology that integrates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02C09D11/50
CPCB01J13/02C09D11/50
Inventor 李春芝曹瑜麻宝成李新宇王志强
Owner CHINA BANKNOTE SECURITY PRINTING TECH RES INST CO LTD
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