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Responsive photonic crystal film with wide temperature induction interval and preparation method thereof

A magnetic photonic crystal and photonic crystal technology, applied in the direction of coating, etc., can solve the problems of easy to be changed, low saturation, and easy destruction of ordered structure, and achieve the effect of good order and high saturation

Active Publication Date: 2021-04-02
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gel obtained by directly immobilizing the ordered micro-nano structure formed by monodisperse colloidal nanoparticles on the gel matrix preparation method, the change of the lattice spacing is synchronized with the deformation of the hydrogel, which is easy to be changed, so that In a very short temperature range, the color change range spans the entire visible light, even red shift / blue shift to infrared / ultraviolet region and lose color
In addition, when the volume of the gel senses external stimuli to change, the ordered structure is easily destroyed, and the saturation of the membrane is not high.
These problems, such as low saturation and difficult to adjust the color, also make this kind of photonic crystal hydrogel have certain limitations in the application of sensing and self-adaptive camouflage materials.

Method used

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  • Responsive photonic crystal film with wide temperature induction interval and preparation method thereof
  • Responsive photonic crystal film with wide temperature induction interval and preparation method thereof
  • Responsive photonic crystal film with wide temperature induction interval and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Fe 3 o 4@PVP colloidal nanoparticles (particle size of 160nm) are dispersed into 2-hydroxyethyl methacrylate (HEMA), acrylic acid (AA), cross-linking agent ethylene glycol dimethacrylate (EGDMA), photoinitiated agent 2-hydroxy-2-methyl-1-phenylacetone (HMPP) with ethylene glycol (EG) and water to obtain a mixed solution. The particle concentration is 0.8g / mL, the total concentration of HEMA and AA is 0.05g / mL, the amount of HMPP is 2% of the total mass of HEMA and AA, the quality of EGDMA is 1% of the total mass of HEMA and AA, and the amount of HEMA and AA The molar ratio is 1:1, and the volume ratio of EG and water is 6:1.

[0032] (2) Place the uniformly dispersed mixed solution under a magnetic field of 250Gs, and cure it with an ultraviolet lamp for 3 minutes. After the reaction is completed, add ethanol, and settle under a magnetic field for washing to obtain magnetic photonic crystal elastic nanochains.

[0033] (3) The magnetic photonic crystal elastic na...

Embodiment 2

[0038] (1) Fe 3 o 4 @PVP colloidal nanoparticles (particle size of 160nm) are dispersed into 2-hydroxyethyl methacrylate (HEMA), acrylic acid (AA), cross-linking agent ethylene glycol dimethacrylate (EGDMA), photoinitiated agent 2-hydroxy-2-methyl-1-phenylacetone (HMPP) with ethylene glycol (EG) and water to obtain a mixed solution. The particle concentration is 0.8g / mL, the total concentration of HEMA and AA is 0.05g / mL, the amount of HMPP is 2% of the total mass of HEMA and AA, the quality of EGDMA is 3% of the total mass of HEMA and AA, and the amount of HEMA and AA The molar ratio is 1:1, and the volume ratio of EG and water is 6:1.

[0039] (2) Place the uniformly dispersed mixed solution under a magnetic field of 250Gs, and cure it with an ultraviolet lamp for 3 minutes. After the reaction is completed, add ethanol, and settle under a magnetic field for washing to obtain magnetic photonic crystal elastic nanochains.

[0040] (3) The magnetic photonic crystal elastic n...

Embodiment 3

[0045] (1) Fe 3 o 4 @PVP colloidal nanoparticles (particle size of 80nm) are dispersed into 2-hydroxyethyl methacrylate (HEMA), acrylic acid (AA), cross-linking agent ethylene glycol dimethacrylate (EGDMA), photoinitiated In a solution composed of 2-hydroxy-2-methyl-1-phenylacetone (HMPP), ethylene glycol (EG) and water, a mixed solution is formed. The particle concentration is 0.4g / mL, the concentration of HEMA-co-AA is 0.100g / mL, the mass of HMPP is 1% of the mass of monomer HEMA-co-AA, and the mass of EGDMA is 1% of the mass of monomer HEMA-co-AA 6%, the molar ratio of HEMA to AA is 1:1, and the volume ratio of EG to water is 6:1.

[0046] (2) Place the uniformly dispersed mixed solution under a magnetic field of 150Gs, and cure it with an ultraviolet lamp. The curing time is 3 minutes. After the reaction is completed, add ethanol, and settle under the magnetic field for washing to obtain elastic magnetic photonic crystal elastic nanoparticles. chain.

[0047] (3) The o...

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Abstract

The invention relates to the field of display materials, in particular to a responsive photonic crystal film with a wide temperature induction interval and a preparation method of the responsive photonic crystal film. Theresponsive photonic crystal film comprises a substrate and a temperature-sensitive responsive photonic crystal gel film bound on the substrate, and the temperature-sensitive responsive photonic crystal gel film is composed of a temperature-sensitive responsive gel matrix and a magnetic photonic crystal elastic nano chain fixed in the temperature-sensitive responsive gel matrix. The color of the photonic crystal film changes in two color systems along with the temperature change. In the temperature induction interval, the color is basically unchanged; and after the intervalis induced, the photonic band gap is subjected to blue shift along with temperature rise, and the color of the photonic band gap is changed to another color system until volume phase change occurs and the color disappears. According to the preparation method disclosed by the invention, the magnetic photon nano elastic chain is dispersed in the temperature-sensitive responsive gel prepolymer solution and coats the surface of the substrate, and the gel film bound by the substrate is obtained by combining a magnetic orientation technology and a curing reaction, so that the preparation period isshort, and the method is simple and easy to operate.

Description

technical field [0001] The invention relates to the technical field of display material preparation, in particular to a responsive photonic crystal film with a wide temperature induction range and a preparation method thereof. Background technique [0002] The photonic crystal film based on intelligent responsive hydrogel fixes the ordered micro-nano structure formed by monodisperse colloidal nanoparticles in the intelligent responsive hydrogel, and utilizes the perception of the external environment of the hydrogel to make the photonic crystal lattice The distance and refractive index are changed, so that the response signal is converted into a color signal visible to the naked eye, and it has a wide range of applications in sensing, detection, anti-counterfeiting and other fields. For example, "American Chemical Society-Applied Materials and Interfaces" (ACS Appl.Mater.Interfaces 2017, Volume 9, Page 27927) fixes PS nanoparticles in PNIPAM films, and uses the deformation o...

Claims

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Application Information

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IPC IPC(8): C03C17/00C03C17/32C09D4/02C09D4/06C09D7/62C08J3/075C08L51/00C08K9/10C08K3/22C08F265/04C08F265/02C08F220/54C08F220/58C08F222/38
CPCC03C17/009C03C17/32C09D4/06C09D7/62C09D7/68C08J3/075C08F265/04C08F265/02C08J2351/00C08K9/10C08K2003/2275C08K2201/005C08K2201/011C08F220/54C08F220/58C08F222/385
Inventor 马会茹闫鹤轩李刚陈继涛罗巍官建国
Owner WUHAN UNIV OF TECH
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