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A kind of preparation method of low-angle-dependent structural chromogenic thin film

A dependent, low-angle technology, applied in the direction of microsphere preparation, microcapsule preparation, and device for coating liquid on the surface, etc., can solve the problem of structural color angle dependence and limit application, and achieve high color saturation and large application foreground effect

Active Publication Date: 2021-05-07
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the angular dependence of structural color greatly limits its practical application in the fields of color and display.

Method used

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  • A kind of preparation method of low-angle-dependent structural chromogenic thin film
  • A kind of preparation method of low-angle-dependent structural chromogenic thin film
  • A kind of preparation method of low-angle-dependent structural chromogenic thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Step 1: Add 2.5ml of tetraethyl orthosilicate to 38ml of absolute ethanol, stir for 25min to make it evenly mixed to make solution A; mix 5ml of ammonia water with a concentration of 25%-28%, 40ml of absolute ethanol and 30ml of deionized Mix with water and stir for 25 minutes to make it evenly mixed to make solution B; the prepared solutions A and B are colorless and transparent.

[0041] Step 2: Mix solution A and solution B prepared in step 1 and stir to make them evenly mixed. The mixed solution is white. Stir and react at 50°C for 4 hours at a stirring speed of 1800 rpm to obtain a reaction product. The mixed solution is a homogeneously mixed milky white solution; the reaction product cooled to room temperature is subjected to centrifugal treatment (rotating speed is 5000 rpm, and the time is 25 minutes), and the supernatant is poured off to obtain product C; Centrifuge the product C with deionized water (rotating speed is 4000 rpm, time is 30 minutes), pour off th...

Embodiment 2

[0049] Step 1: Add 0.5ml of tetraethyl orthosilicate to 35ml of absolute ethanol, stir for 30min to make it evenly mixed to make solution A; mix 3.5ml of ammonia water with a concentration of 25%-28%, 45ml of absolute ethanol and 35ml of dehydrated Mix ionic water and stir for 30 minutes to make it evenly mixed to make solution B; the prepared A and B solutions are colorless and transparent;

[0050] Step 2: Mix solution A and solution B prepared in step 1 and stir to make them evenly mixed. The mixed solution is white. Stir and react at 40°C for 5 hours at a stirring speed of 2000 rpm to obtain a reaction product. The reaction product is The mixed solution is a homogeneously mixed milky white solution; the reaction product cooled to room temperature is subjected to centrifugal treatment (rotating speed is 6000 rpm, and the time is 20 minutes), and the supernatant is poured off to obtain product C; Centrifuge the product C with deionized water (rotating speed is 5000 rpm, time...

Embodiment 3

[0057] Step 1: Add 4ml of tetraethyl orthosilicate to 40ml of absolute ethanol, stir for 28min to make it evenly mixed to make solution A; mix 2ml of ammonia water with a concentration of 25%-28%, 43ml of absolute ethanol and 32ml of deionized water Mix and stir for 28 minutes to make it evenly mixed to make solution B; the prepared A and B solutions are colorless and transparent;

[0058] Step 2: Mix solution A and solution B prepared in step 1 and stir to make them evenly mixed. The mixed solution is white. Stir and react at 30°C for 3 hours at a stirring speed of 2400 rpm to obtain a reaction product. The mixed solution is a homogeneously mixed milky white solution; the reaction product cooled to room temperature is subjected to centrifugation (rotating speed is 4000 rpm, and the time is 30 minutes), and the supernatant is poured off to obtain product C; Centrifuge product C with deionized water (rotating speed is 6000 rpm, time is 20 minutes), pour off supernatant, repeat ...

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Abstract

The invention provides a method for preparing a low-angle-dependent structural chromogenic film, and belongs to the technical field of structural chromogenic material preparation. The problem of angle dependence of structural chromogenic thin films was solved, and a specific preparation process and conditions were found to prepare high-quality chromogenic thin film materials. It provides a method for generating a specific black material in a weak alkaline environment, coating it on the surface of other materials to form a core-shell structure, and then combining various media and processes to prepare a structural color-developing film. The preparation method is characterized in that it uses a weak base environment, combines various materials and processes to form a structural color-developing film material with a specific structure, the particle size of the core-shell particles is between 135-275nm, and the peak of the film reflection spectrum is at 460-650nm between. The structural chromogenic film material prepared by the invention has many advantages such as good color rendering effect, isotropy and environmental protection, and has application value in the aspects of pigment, display, anti-counterfeiting and sensing.

Description

technical field [0001] The invention belongs to the technical field of preparation of structural chromogenic materials, in particular to a preparation method of a low-angle-dependent structural chromogenic film Background technique [0002] Structural color is a special light-color effect produced by the interaction between the microscopic structure of matter and light, such as reflection, transmission, diffraction and interference. Low-angle-dependent structural chromogenic film material is a color-producing material based on the principle of physical structure color rendering. Its special properties can make the color it presents have the characteristics of isotropy, brightness, and high saturation. , as long as the structure of the material does not change, its color will never fade. Due to these advantages of low-angle-dependent structural color materials, they have great potential application prospects in the fields of printing materials, anti-counterfeiting, display a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J7/06C09D133/12B01J13/02B05D5/06B05D7/24B05D7/04C08L27/06C08L67/02
CPCB01J13/02B05D5/065B05D7/04B05D7/24B05D2201/02B05D2203/30C08J7/04C08J7/042C08J7/06C08J2327/06C08J2367/02C08J2433/12
Inventor 陈永利王淑珍田婕慧王雪平
Owner TIANJIN UNIV OF SCI & TECH
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