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Inorganic-organic hybrid photoelectrochromic material as well as preparation method and application thereof

An organic hybridization and chromogenic technology, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, optics, etc., can solve the problems of low coloring efficiency, complex components, cumbersome preparation steps, etc., and achieve good photochromic effect and preparation process Simple, easy-to-composite effects

Active Publication Date: 2022-04-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the coloring efficiency of the existing photochromic devices is low, requiring higher power ultraviolet light irradiation, or a longer period of ultraviolet light irradiation to obtain a more obvious discoloration effect, so it is impossible to adjust the temperature in time in daily use. effect, and the photochromic liquid currently on the market has complex components, high cost, and cumbersome preparation steps, which restrict the development of photochromic products

Method used

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  • Inorganic-organic hybrid photoelectrochromic material as well as preparation method and application thereof
  • Inorganic-organic hybrid photoelectrochromic material as well as preparation method and application thereof
  • Inorganic-organic hybrid photoelectrochromic material as well as preparation method and application thereof

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Effect test

Embodiment 1

[0033] Dissolve 3g of sodium tungstate in 40mL of distilled water, slowly drop into 3mL of 2,6-lutidine, stir for half an hour, the solution gradually becomes clear from turbidity, then add 1mol / L hydrochloric acid drop by drop, adjust the pH to 5.6, As hydrochloric acid was dripped in, white flocs were gradually produced and dissolved by stirring. The exothermic reaction caused the temperature of the outer wall of the container to rise, and then heated to 60°C for 8 hours. The reaction precipitate was collected every 2 hours, and a total of 4 precipitates were collected. The precipitate was dried in an oven at 80°C to obtain a white powder precipitate. Dissolve 1 g of the precipitate in 10 mL of PC (propylene carbonate) and ultrasonically homogenize to obtain a color-changing liquid. Paste two pieces of glass together with double-sided tape to build an interlayer, use capillary phenomenon to fill the discoloration liquid into the interlayer and seal it to complete the package...

Embodiment 2

[0035] Dissolve 3g of sodium tungstate in 40mL of distilled water, add 10mL of 2mol / L hydrochloric acid, the solution gradually turns yellow, then add ethylenediamine dropwise to adjust the pH to 5.6, with the addition of ethylenediamine, gradually white flocculent The reaction was violently exothermic, and the temperature of the outer wall of the container rose significantly, and then heated to 60°C to react, and the reaction precipitate was collected every 2 hours, and a total of 4 precipitates were collected. The precipitate was dried in an oven at 80°C to obtain a white powder precipitate. Dissolve 1 g of the precipitate in 10 mL of PC (propylene carbonate) and ultrasonically homogenize to obtain a color-changing liquid. Paste two pieces of glass together with double-sided tape to build an interlayer, use capillary phenomenon to fill the discoloration liquid into the interlayer and seal it to complete the package. Put the packaged device under a 5W ultraviolet lamp and ir...

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Abstract

The invention discloses an inorganic-organic hybrid photoelectrochromic material as well as a preparation method and application thereof. The organic-inorganic hybrid photochromic material is obtained by reacting organic alkaline small molecules with tungstate / metatungstate under an acidic condition, separating out and drying, and the photochromic material has the characteristics of high sensitivity, high thermal stability, low cost and simple synthesis. The photochromic device can be prepared by dissolving a small amount of the material in a solvent and packaging the material in a transparent interlayer by using a capillary packaging method. The blue color can be converted into obvious blue color under the irradiation of sunlight, and the color is gradually recovered after the illumination is stopped.

Description

technical field [0001] The invention belongs to the field of photochromic technology, in particular to an inorganic-organic hybrid photochromic material and its preparation method and application. Background technique [0002] A photochromic device is a device that undergoes a significant color change when illuminated. As a non-luminous, low-power display technology, this color change is very suitable for architecture, automobiles, interior design and consumer products. There are two structures of photochromic devices. The first is to mix the photochromic material and the substrate material to make a single-layer device, and the second is to separate the photochromic material and the substrate to make a three-layer device. Over the past few decades, photochromic devices (ECDs) have been widely used in energy-efficient buildings, optical information, and other fields. However, the coloring efficiency of the existing photochromic devices is low, requiring higher power ultravi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00G02F1/1516G02F1/1524
Inventor 宁洪龙李牧云姚日晖张观广李星林邹文昕吴振宇张康平郭晨潇彭俊彪
Owner SOUTH CHINA UNIV OF TECH
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