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A kind of solvochromic photonic crystal fabric and its preparation and application

A photonic crystal and color-changing technology, applied in textiles and papermaking, physical treatment, fiber treatment, etc., can solve the problems that photonic crystal structure is easy to be destroyed, does not have color-changing performance, and achieves sustainable use comfort and stretchability Stability, simple and practical effect

Active Publication Date: 2021-11-09
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a solvent-induced color photonic crystal fabric and its preparation and application, to overcome the defects of the prior art that the photonic crystal structure is easily destroyed and does not have color-changing performance, and the present invention provides a solvent-induced color photonic crystal fabric. The preparation method of photonic crystal fiber is to prepare core-shell microspheres by semi-continuous emulsion polymerization. The outer layer of the microspheres collapses during the process of assembling on the surface of the fabric, bonding the photonic crystal structure, which greatly improves its mechanical properties and is stable in the fabric. A layer of transparent photonic crystal film is formed on the surface of the inner fiber bundle. When exposed to a certain solvent, the photonic crystal structure on the fabric will produce a change in effective refractive index, which is manifested as a change in the color of the fabric macroscopically. The change in the effective refractive index of the photonic crystal structure is different, and the macroscopic manifestation is the difference in the color change of the fabric

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A kind of solvochromic photonic crystal fabric and its preparation and application
  • A kind of solvochromic photonic crystal fabric and its preparation and application
  • A kind of solvochromic photonic crystal fabric and its preparation and application

Examples

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Effect test

Embodiment 1

[0036]Measure 100ml of ultrapure water, 5ml of styrene, and 5ml of n-butyl acrylate into a three-necked flask, put them into an oil bath with a condensing device, set the temperature at 70°C, stir at 400rpm, and blow nitrogen for 20 minutes. Then dissolve 0.05g of potassium persulfate in 10ml of ultrapure water and add to the reaction system to initiate seed emulsion polymerization. The reaction lasts for 1h, then measure 15ml of styrene, 15ml of n-butyl acrylate, and 2ml of acrylic acid into the reaction system. After dissolving 0.2g of potassium persulfate, add it to the reaction system to initiate the next step of emulsion polymerization. The reaction lasts for 4 hours. The obtained emulsion is centrifuged and washed three times and then freeze-dried for later use. Weigh 1g of the obtained P(St-BA-AA) colloidal microspheres , ultrasonically dispersed in 3ml ultrapure water (the mass fraction of P(St-BA-AA) colloidal microspheres is 30%), then add 1.2mg of acetylene carbon bl...

Embodiment 2

[0038] Measure 100ml of ultrapure water, 5ml of styrene, and 5ml of n-butyl acrylate, weigh 0.01g of sodium dodecylbenzenesulfonate, place it in a three-necked flask, put it into an oil bath with a condensing device, and set the temperature 75°C, stirring speed 600rpm, nitrogen gas for 20min, then dissolve 0.05g potassium persulfate in 10ml ultrapure water and add to the reaction system to initiate seed emulsion polymerization, the reaction lasts 1h, then measure 15ml styrene, 15ml n-butyl acrylate, Add 2ml of acrylic acid to the reaction system, dissolve 0.2g of potassium persulfate in 20ml of ultrapure water, and then add it to the reaction system to initiate the next emulsion polymerization. The reaction lasts for 4 hours. The obtained emulsion is centrifugally washed three times and then freeze-dried for later use. Weigh 1.2 The P (St-BA-AA) colloidal microspheres that g obtains is ultrasonically dispersed in 3ml ultrapure water (the mass fraction of P(St-BA-AA) colloidal m...

Embodiment 3

[0040] Measure 100ml of ultrapure water, 5ml of styrene, and 5ml of n-butyl acrylate, weigh 0.02g of sodium dodecylbenzenesulfonate, place it in a three-necked flask, put it into an oil bath with a condensing device, and set the temperature The temperature is 80°C, the stirring speed is 800rpm, nitrogen gas is passed for 20min, and then 0.05g potassium persulfate is dissolved in 10ml ultrapure water and added to the reaction system to initiate seed emulsion polymerization. The reaction lasts for 1h, and then measure 15ml styrene, 15ml n-butyl acrylate, Add 2ml of acrylic acid to the reaction system, dissolve 0.2g of potassium persulfate with 20ml of ultrapure water, and then add it to the reaction system to initiate the next emulsion polymerization. The reaction lasts for 4 hours. The obtained emulsion is centrifugally washed three times and then freeze-dried for later use. Weigh 1.5 g obtained P (St-BA-AA) colloidal microspheres, ultrasonically dispersed in 3ml ultrapure water...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention relates to a solvent-induced photonic crystal fabric and its preparation and application. The preparation comprises: P(St-BA-AA) colloidal microspheres of core-shell structure are dispersed in water and evenly mixed with a trace amount of acetylene carbon black, and then It is evenly loaded on the surface of the fabric, and dried. The polyester fabric self-assembled by the colloidal microspheres of the present invention presents its original black color, and the color can change when it encounters water or other solvents. The color of the fabric is different when the solvent is different, and the fabric can be used without consuming external energy. It can change color under the environment, and has potential applications in humidity detection, anti-counterfeiting, hiding two-dimensional codes and other fields.

Description

technical field [0001] The invention belongs to the field of solvochromic materials and their preparation and application, in particular to a solvochromic photonic crystal fabric and its preparation and application. Background technique [0002] The advanced dyeing process of fabrics or fibers makes our world colorful. The color of fabrics is not only beautiful and fashionable, but also has extremely important uses in other fields (such as military, anti-counterfeiting, and detection fields). In the modern clothing industry, the color is to cover the surface of the fabric with the dye through the dyeing and finishing process, so that the monotonous textile material has rich colors. But once these colors are formed, it is difficult to change, let alone change according to the environment and people's will, which limits its application in more fields. In recent years, with the rise of smart clothing and wearable concepts, the intelligent color change of clothing or fabrics is...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M15/263D06M15/233D06M11/74D06M10/10D06M10/06D06M101/32
Inventor 李耀刚巩鑫波王宏志侯成义张青红
Owner DONGHUA UNIV
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