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Preparation method of reversible color-changing photonic crystal hydrogel film

A technology of photonic crystals and hydrogels, applied in the field of preparation of reversible discoloration hydrogels, can solve the problems of sensitivity, limited range of discoloration and limitations of reusability, etc., achieving strong repeatability and simple operation Effect of controlled, good mechanical properties

Active Publication Date: 2021-05-11
苏州国纳思新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, researchers have conducted extensive research on responsive photonic crystal hydrogels, and proposed a wide range of applications in the fields of temperature, humidity, pressure sensing, ion detection, color display, anti-counterfeiting, etc. , limited range of discoloration and reusability are restricted to varying degrees

Method used

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  • Preparation method of reversible color-changing photonic crystal hydrogel film
  • Preparation method of reversible color-changing photonic crystal hydrogel film
  • Preparation method of reversible color-changing photonic crystal hydrogel film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Immerse the glass slide in ethanol and ultrasonically clean it for 30 minutes, put it into a subatmospheric pressure glow discharge processor after drying, and carry out surface hydrophilic modification for 2 minutes to obtain a surface hydrophilic modified glass slide; take the poly( Styrene-acrylic acid) colloidal nanoparticle emulsion, the mass ratio of poly(styrene-acrylic acid) colloidal nanoparticle and deionized water is 0.002:1 to dilute and mix to obtain the dilute dispersion and place it in a 50mL beaker. Insert the glass slide vertically into the beaker, fix it and put it into a constant temperature and humidity box (temperature 60°C, humidity 80%) for self-assembly. After the dilute dispersion is completely volatilized, a photon with opal structure is obtained A slide-glass template for crystals, showing a vivid purple structural color;

[0031] The photonic crystal film is scanned by electron microscope, the results can be found in figure 1 , the results s...

Embodiment 2

[0039] Immerse the glass slide in ethanol and ultrasonically clean it for 30 minutes, put it into a subatmospheric pressure glow discharge processor after drying, and carry out surface hydrophilic modification to obtain a surface hydrophilic modified glass slide; Ethylene-acrylic acid) colloidal nanoparticle emulsion, the mass ratio of poly(styrene-acrylic acid) colloidal nanoparticle and deionized water is 0.001:1 dilution and mixing to obtain a dilute dispersion and placed in a 50mL beaker, the hydrophilic modified Insert the glass slide vertically into the beaker, fix it and put it in a constant temperature and humidity box (temperature 50°C, humidity 70%) for self-assembly. After the dilute dispersion is completely volatilized, a photonic crystal with an opal structure is obtained , showing a vivid blue structural color;

[0040] 0.4g of acrylamide, 0.3g of isopropylacrylamide, 0.15g of polyethylene glycol diacrylate (weight average molecular weight 575), 0.02g of N,N'-met...

Embodiment 3

[0045] Immerse the glass slide in ethanol and ultrasonically clean it for 30min, put it into a subatmospheric pressure glow discharge processor after drying, and carry out surface hydrophilic modification to obtain a surface hydrophilic modified glass slide; Ethylene-acrylic acid) colloidal nanoparticle emulsion, the mass ratio of poly(styrene-acrylic acid) colloidal nanoparticle and deionized water is 0.003:1 dilution and mixing to obtain a dilute dispersion and placed in a 50mL beaker, the hydrophilic modified Insert the glass slide vertically into the beaker, fix it and put it in a constant temperature and humidity box (temperature 70°C, humidity 90%) for self-assembly. After the dilute dispersion is completely volatilized, a photonic crystal with an opal structure is obtained , showing a vivid blue structural color;

[0046] 0.6g acrylamide, 0.5g isopropylacrylamide, 0.2g polyethylene glycol diacrylate (weight average molecular weight 575), 0.03g N,N'-methylene bisacrylami...

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Abstract

The invention relates to a preparation method of a reversible color-changing photonic crystal hydrogel film. The method comprises the following steps of: preparing a layer of uniform and bright photonic crystal film on a hydrophilic treated glass slide through vertical deposition self-assembly; uniformly mixing acrylamide, isopropylacrylamide, polyethylene glycol diacrylate and N, N'- methylene diacrylamide and a photoinitiator in an organic solvent to obtain a mixed solution; and by taking the prepared photonic crystal film as a template, infiltrating the mixed solution into gaps of the photonic crystal film by using a clamping piece method for filling, and carrying out ultraviolet-initiated polymerization to obtain the photonic crystal hydrogel film. The method is simple to operate, special equipment is not needed, and the obtained photon hydrogel film has excellent mechanical tensile property, sensitive humidity responsiveness and organic solvent responsiveness and can be applied to the fields of sensing, detection and the like.

Description

technical field [0001] The invention relates to a preparation method of a reversible discoloration hydrogel, in particular to a preparation method of a photonic crystal hydrogel with fast reversible discoloration sensitive to humidity and organic solvents. Background technique [0002] Photonic crystals refer to ordered structural materials formed by periodic arrangement of two or more substances with different refractive indices (dielectric constants). gap (similar to a forbidden band in semiconductors). The main feature of photonic crystals is the photonic band gap. When the band gap falls within the range of visible light, light waves will be reflected and refracted multiple times in the photonic crystal. The reflected light and refracted light are superimposed on each other and form Bragg diffraction. Macroscopically, it shows Bright structured colour. [0003] Responsive photonic crystals are a combination of photonic crystals and stimuli-responsive smart materials, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/56C08F220/54C08F222/38C08F2/48C08J5/18C08J3/075C08L51/08G01N21/78
CPCC08F283/065C08F2/48C08J5/18C08J3/075G01N21/78C08J2351/08C08F220/56C08F220/54C08F222/385
Inventor 陈苏郭敏
Owner 苏州国纳思新材料科技有限公司
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