Color-changing particle and preparation method thereof

A particle and polymer technology, applied in the field of hybrid color-changing particles containing responsive polymers and inorganic components and their preparation, can solve problems such as limiting the scope of application, and achieve improved color-changing performance, improved color-changing performance, and easy process control. Effect

Pending Publication Date: 2021-05-25
BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As an important material with multiple photochromic characteristics, inorganic color-changing materials (such as tungsten oxide, molybdenum oxide, etc.) are used in many materials, but most of them are used in various forms (such as films) in dispersed forms. However, its regular-shaped color-changing particles have not been reported, which seriously limits its application range.

Method used

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  • Color-changing particle and preparation method thereof
  • Color-changing particle and preparation method thereof
  • Color-changing particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1, Preparation of tungsten oxide / poly(N-isopropylacrylamide) intelligent color-changing particles

[0069] Add 10 g of poly(N-isopropylacrylamide) particles (containing N N'-methylenebisacrylamide cross-linking agent in a 250 mL flask, in which N-isopropylacrylamide monomer and N N'-methylene The mass ratio of the base bisacrylamide crosslinking agent is 10:1), add 150mL of water, fully disperse, add 1g of sodium tungstate, stir for 10 minutes, add 10mL of 10M hydrochloric acid, react for 1 hour, centrifuge and wash with water Get smart color-changing particles.

[0070] figure 1 It is the SEM picture of the prepared tungsten oxide / poly(N-isopropylacrylamide) intelligent color-changing particles.

[0071] figure 2 It is a photo of the prepared tungsten oxide / poly(N-isopropylacrylamide) intelligent color-changing particles under ultraviolet irradiation and a photo of visible light irradiation.

[0072] It can be seen from the figure that the tungsten oxide / p...

experiment example 2

[0073] Experimental example 2. Preparation of tungsten oxide / poly(N-isopropylacrylamide-acrylic acid) intelligent color-changing particles

[0074] Add 1 g of poly(N-isopropylacrylamide-acrylic acid) (containing divinylbenzene crosslinking agent, the molar ratio of N-isopropylacrylamide to acrylic acid is 10:1, The addition amount of the joint agent is 2% of the total moles of the two monomers), add 200mL of water, fully disperse and add 2g of potassium tungstate, stir for 1 hour, add 10mL of 1M hydrochloric acid, react for 10 hours, centrifuge, and water Wash well to get smart granules.

[0075] image 3 For the discoloration pictures of the prepared tungsten oxide / poly(N-isopropylacrylamide-acrylic acid) intelligent discoloration particles,

[0076] It can be seen from the figure that the tungsten oxide / poly(N-isopropylacrylamide-acrylic acid) intelligent color-changing particles turn blue-blue after ultraviolet irradiation, and the parts that are not illuminated are yellow....

experiment example 3

[0077] Experimental example 3, preparation of molybdenum oxide / poly(N-isopropylacrylamide) intelligent color-changing particles

[0078] Disperse 0.1g of poly(N-isopropylacrylamide) particles in 200mL of water; then add 0.1g of potassium molybdate and 0.001g of sodium zincate, stir and add 10mL of 1M hydrochloric acid, react for 1 hour and then separate and wash to obtain smart Discoloration particles.

[0079] The color of the molybdenum oxide / poly(N-isopropylacrylamide) particles obtained by irradiating with ultraviolet light changes from yellow to dark blue.

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Abstract

The invention discloses a color-changing particle and a preparation method thereof. The particle comprises a substrate polymer particle and an inorganic component, and the particle is responsive to ultraviolet light, visible light and temperature. The preparation method of the particle comprises the following steps: adding responsive polymer particles into a solvent, adding an inorganic precursor, and then adding a catalyst to deposit inorganic matters in the particles. The particle provided by the invention can be used for intelligent color-changing surfaces, color-changing fibers or clothes, flexible display and the like, and has wide application prospects in various fields of art, anti-counterfeiting, military camouflage, sensing and the like, and the preparation method is simple, convenient, easy to control, universal and suitable for mass production and application.

Description

technical field [0001] The invention relates to a color-changing particle and a preparation method thereof, in particular to a hybrid color-changing particle containing a responsive polymer and an inorganic component and a preparation method thereof. Background technique [0002] In the field of material chemistry, the development of smart materials has aroused widespread interest, among which the wide application of color-changing materials in art design, military camouflage, anti-counterfeiting, sensing and display has become one of the research hotspots. At present, color-changing materials are mainly divided into two categories: inorganic color-changing materials and organic color-changing materials. Among them, inorganic color-changing materials such as silver chloride, tungsten oxide, molybdenum oxide, titanium dioxide, etc., but the color-changing efficiency is low; Although fulgides and the like have high discoloration efficiency, they have poor stability. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/24C08K3/24C08K3/22C08L25/08
CPCC08K3/24C08K3/22C08K2003/2258C08K2003/2255C08K2003/2237
Inventor 刘继广张启
Owner BEIJING INSTITUTE OF CLOTHING TECHNOLOGY
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