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Thermochromic photonic crystal film in body temperature region and preparation method thereof

A technology of photonic crystals and thermochromism, applied in optics, nonlinear optics, instruments, etc., can solve the problems of temperature-sensitive photonic crystals detecting temperature lower than human body temperature, inaccurate measurement results, judging body temperature, etc., and achieving good results Good application prospects, good naked-eye recognition, and easy-to-operate effects

Active Publication Date: 2020-01-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the detection temperature of the temperature-sensitive photonic crystals currently prepared is lower than that of the human body, which limits its application in the human body environment and other fields.
Moreover, the thermochromic temperature measuring stickers currently on the market have inaccurate measurement results, and it is impossible to judge the body temperature based on the displayed color.

Method used

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  • Thermochromic photonic crystal film in body temperature region and preparation method thereof
  • Thermochromic photonic crystal film in body temperature region and preparation method thereof
  • Thermochromic photonic crystal film in body temperature region and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Fe 3 o 4 The dispersion of @PVP colloidal nanoparticles (particle size is 120nm) is composed of N-isopropylacrylamide (NIPAM), N-methylolacrylamide NHMA, cross-linking agent N, N'-methylenebisacrylamide (BIS), photoinitiator 2-hydroxyl-2-methyl-1-phenylacetone (HMPP), and in the solution that water forms, the concentration of NIPAM-co-NHMA is 0.083g / mL, the concentration of HMPP is NIPAM -3% of the mass of co-NHMA monomer, the concentration of BIS is 1.25% of the mass of NIPAM-co-NHMA comonomer, the mass ratio of NIPAM to NHMA is 17:3, and the volume of water is 1.2ml.

[0031] (2) Place the hydrophilic glass sheet loaded with the pre-polymerization solution under a magnetic field of 200Gs, and cure it with a UV lamp for 5 minutes. After the reaction is completed, the obtained photonic crystal film is washed with water and swelled at room temperature Equilibrium, showing Fe 3 o 4 Intrinsic color of @PVP colloidal nanoparticles.

[0032] (3) Soak the thermochrom...

Embodiment 2

[0038] (1) Fe 3 o 4 @PVP colloidal nanoparticles (particle size of 120nm) are dispersed into N-isopropylacrylamide (NIPAM), N-methylolacrylamide (NHMA), cross-linking agent N, N'-methylenebisacryl Amide (BIS), photoinitiator 2-hydroxyl-2-methyl-1-phenylacetone (HMPP), and in the solution that water forms, the concentration of NIPAM-co-NHMA is 0.083g / mL, the concentration of HMPP is The mass of NIPAM-co-NHMA comonomer is 3%, the concentration of BIS is 1.25% of the mass of NIPAM-co-NHMA comonomer, the mass ratio of NIPAM to NHMA is 3:1, and the volume of water is 1.2ml.

[0039] (2) Place the glass sheet loaded with the pre-polymerization solution under an external magnetic field of 200Gs, and cure it with an ultraviolet lamp for 5 minutes. After the reaction, a thermochromic photonic crystal film in the body temperature zone is obtained.

[0040] (3) Soak the thermochromic photonic crystal film in the body temperature zone in a circulating constant temperature water bath. When...

Embodiment 3

[0043] (1) Fe 3 o 4 @PVP colloidal nanoparticles (particle size of 180nm) are dispersed into N-isopropylacrylamide (NIPAM), N-methylolacrylamide NHMA, cross-linking agent N, N'-methylenebisacrylamide ( BIS), photoinitiator 2-hydroxyl-2-methyl-1-phenylacetone (HMPP), and in the solution that water forms, the concentration of NIPAM-co-NHMA is 0.083g / mL, the concentration of HMPP is NIPAM- The mass of co-NHMA comonomer is 3%, the concentration of BIS is 1.25% of the mass of NIPAM-co-NHMA comonomer, the mass ratio of NIPAM to NHMA is 17:3, and the volume of water is 1.2ml.

[0044] (2) Place the glass substrate loaded with the pre-polymerization solution under an external magnetic field of 300Gs, and cure it with an ultraviolet lamp for 5 minutes. After the reaction, a thermochromic photonic crystal film in the body temperature zone is obtained.

[0045] (3) Soak the thermochromic photonic crystal film in the body temperature zone in a circulating constant temperature water bath...

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Abstract

The invention relates to the field of display material preparation, in particular to a thermochromic photonic crystal film in a body temperature area and a preparation method thereof. The photonic crystal film is of a 1D chain-shaped photonic structure formed by taking hydrophilic glass as a substrate and temperature-sensitive responsive gel as a matrix and embedding monodisperse Fe3O4-coated PVPcolloid nanoparticles into the matrix for magnetic assembly. The technical characteristics and excellent effects of the thermochromic photonic crystal film are as follows: 1) the preparation method issimple and easy to operate; 2) the photonic crystal film can be used as a naked eye observation criterion before temperature detection of the body temperature area; 3) the thermochromic photonic crystal film in the body temperature area is prepared; the color-changing temperature ranges from 36.0 DEG C to 42.0 DEG C, the covering temperature range is wide, corresponding changes of the structuralcolor can be caused by changes of the temperature of 1 DEG C, and the thermochromic photonic crystal film has the advantages of being high in temperature perceptibility and good in naked eye recognizability and has good application prospects in the fields of body temperature detection, disease diagnosis and the like.

Description

technical field [0001] The invention relates to the field of display material preparation, in particular to a thermochromic photonic crystal film in a body temperature range and a preparation method thereof. Background technique [0002] Thermochromic photonic crystals are a sensor for temperature detection that combines photonic crystal structures and thermosensitive hydrogels. PNIPAM hydrogel undergoes reversible hydrophilic / hydrophobic and chain stretching / curling volume phase transition properties at about 32 °C, and has a good response to ambient temperature. This particular material has attracted widespread interest in the fields of biosensing, drug payload delivery, gene delivery, chemical analysis, and surface wettability. At present, thermochromic photonic crystals based on PNIPAM hydrogel have made great research progress, such as [The Journal of Physical Chemistry B.2000, volume 104, page 6327] using PNIPAM-co with a particle size of 210nm -AA monodisperse micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F220/54C08F2/48C08J5/18C08L51/10G02F1/01
CPCC08F2/48C08F292/00C08J5/18C08J2351/10G02F1/0147C08F220/54
Inventor 马会茹陈继涛李刚邓鹏罗巍官建国
Owner WUHAN UNIV OF TECH
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