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Method for preparing full color variable structural chromogenic material

A structural color-producing and variable technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment, etc., can solve the problems that hinder the large-scale production, application, complex preparation process and slow color reaction speed of structural color-producing materials and other problems, to achieve high color saturation, simple preparation process, and save energy costs

Active Publication Date: 2019-02-22
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The emulsion polymerization method mainly grows nanocrystals through the polymerization of the emulsion. Although this method can complete the preparation of the color-producing material, the color reaction speed of the prepared material is relatively slow, and it usually takes ten minutes to several minutes. Hours; Nitrogen protection method promotes the growth of colloidal nanocrystals in a nitrogen environment. Although this method improves the color reaction speed of the chromogenic material, the harsh conditions of "full nitrogen flow" required in the preparation process make The preparation process is very complicated; the high-pressure reaction method is a method of promoting the rapid growth of colloidal nanocrystals in a high-temperature and high-pressure environment to prepare chromogenic materials. The preparation process of this method is relatively simple and the reaction speed is fast, but it requires high temperature and high pressure. The environment is usually provided by a reactor, and the potential safety hazards brought about by its high temperature and high pressure conditions cannot be ignored. In addition, the corresponding energy consumption and cost issues are also important factors that hinder the use of this method for large-scale production and application of structural chromogenic materials.

Method used

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  • Method for preparing full color variable structural chromogenic material
  • Method for preparing full color variable structural chromogenic material
  • Method for preparing full color variable structural chromogenic material

Examples

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Effect test

Embodiment 1

[0032]Step 1: Add 0.8g of anhydrous ferric chloride with a purity of 99.9% to 50mL of ethylene glycol, then add 3.5g of anhydrous sodium acetate, stir at 50°C to completely dissolve it, and obtain a light brown Yellow opaque solution; then add 0.012g of ascorbic acid and stir to make it completely dissolved to obtain a dark green opaque solution; then add 0.6g of poly(4-styrenesulfonic acid-copolymerization-maleic acid) sodium salt (3:1) Add 150 μL of deionized water and stir to completely dissolve it to obtain a dark yellow-brown opaque solution; then add 0.7 g of sodium hydroxide and stir to completely dissolve it to obtain a brown-red transparent solution, and place the above mixture at 190°C for reaction After 3 hours, the lower layer was dark black and the upper layer was transparent layered reaction product; the reaction product was washed twice with absolute ethanol and deionized water respectively to obtain the desired nanoparticle colloidal product. After testing, the...

Embodiment 2

[0036] Step 1: Add 0.9g of anhydrous ferric chloride with a purity of 99.9% to 55mL of ethylene glycol, then add 4.2g of anhydrous sodium acetate, stir at 50°C to completely dissolve it, and obtain a light brown Yellow opaque solution; then add 0.014g of ascorbic acid and stir to make it completely dissolved to obtain a dark green opaque solution; then add 1.4g of poly(4-styrenesulfonic acid-copolymerization-maleic acid) sodium salt (1:1) Add 175 μL of deionized water and stir to completely dissolve it to obtain a dark yellow-brown opaque solution; add 0.8 g of sodium hydroxide and stir to completely dissolve it to obtain a brown-red transparent solution, and place the above mixture at 190°C for reaction After 6 hours, the lower layer was dark black and the upper layer was transparent layered reaction product; the product obtained from the reaction was washed three times with absolute ethanol and deionized water respectively to obtain the desired colloidal product of nanopartic...

Embodiment 3

[0040] Step 1: Add 1.0g of anhydrous ferric chloride with a purity of 99.9% to 60mL of ethylene glycol, then add 5.0g of anhydrous sodium acetate, stir at 50°C to completely dissolve it, and obtain a light brown Yellow opaque solution; then add 0.018g of ascorbic acid and stir to make it completely dissolved to obtain a dark green opaque solution; then add 2.3g of poly(4-styrenesulfonic acid-copolymerization-maleic acid) sodium salt (1:1) Mix with 200 μL of deionized water and stir to dissolve completely to obtain a dark yellow-brown opaque solution; then add 1.0 g of sodium hydroxide and stir to completely dissolve to obtain a brown-red transparent solution, and place the above mixture at 190°C for reaction After 9 hours, the lower layer was dark black and the upper layer was transparent layered reaction product; the reaction product was washed 4 times with absolute ethanol and deionized water respectively to obtain the desired nanoparticle colloidal product. After testing, t...

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Abstract

The invention provides a method for preparing a full color variable structure chromogenic material, and belongs to the technical field of preparation of structural color chromogenic materials. The preparation method provides preparation and optimization of visible light band full color variable structural chromogenic materials, and finds specific preparation processes and conditions to promote efficient high-quality growth of chromogenic material nanocrystals. The preparation method adopts a specific strong base as a material crystal growth environment. The preparation method is characterizedin that the strong base environment is utilized for preparation, the prepared chromogenic material composite particles have the particle diameter of 105-280 nm, and the color with the spectral peak inthe visible spectral range of 450-650 nm can be achieved under magnetic field control. The full color variable structural chromogenic material has the advantages of good color rendering effect and fast color reaction, and has great potential application prospects in photonic ink, anti-counterfeiting aspect, structural color printing, biological and chemical sensing and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of structural color chromogenic materials, and in particular relates to a preparation method of full-color variable structural chromogenic materials. Background technique [0002] Structural color is an optical effect produced by the selective reflection, transmission, diffraction and interference of visible light wavelengths by the microstructure of matter. Panchromatic variable structural color-producing material is a color-producing material based on the principle of structural coloration. Its special properties can make the color of this material have anisotropy, bright color, high saturation, etc. At the same time, it has many characteristics that pigment-colored coloring materials do not have. As long as the structure of the material does not change, its unique color will not fade. Due to these advantages of full-color variable color-generating materials, it has great potential applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C3/06C09C3/08C09C3/10C09C3/12
CPCC09C1/24C09C3/006C09C3/063C09C3/08C09C3/10C09C3/12
Inventor 陈永利陈璐瑶田婕慧
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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