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Photonic crystal nano-composite gel membrane with temperature/humidity dual responses and preparation method of photonic crystal nano-composite gel membrane

A photonic crystal and nanocomposite technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low resolution of optical signals, poor visualization of color changes, slow response rate, etc., to achieve High optical signal resolution, strong visibility of color changes, and bright colors

Inactive Publication Date: 2018-04-17
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of traditional sensors such as slow response rate, low mechanical toughness, poor visualization of color changes, and low resolution of optical signals, and draw lessons from the idea of ​​bionic compounding, introduce physical cross-linking agent inorganic nano-clay, and use the needle tip method to prepare photons The combination of crystals and in situ polymerization to prepare nanocomposite hydrogels enables the rapid response of photonic crystal gel films as sensors through the free movement of molecular chains between clay sheets and the fast and orderly movement of photonic crystals in the gel matrix. , high toughness and excellent optical signal resolution to achieve the purpose of quickly detecting external temperature / humidity changes through color changes

Method used

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  • Photonic crystal nano-composite gel membrane with temperature/humidity dual responses and preparation method of photonic crystal nano-composite gel membrane
  • Photonic crystal nano-composite gel membrane with temperature/humidity dual responses and preparation method of photonic crystal nano-composite gel membrane
  • Photonic crystal nano-composite gel membrane with temperature/humidity dual responses and preparation method of photonic crystal nano-composite gel membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Synthesis of monodisperse latex particles: In a four-necked flask equipped with a condenser, a heating device, a nitrogen protection and a stirring device, add 100 mL of deionized water, and after nitrogen deoxygenation for 35 min, add 5 mL of styrene with a trace amount Add the pipette dropwise into the four-necked flask, raise the temperature to 65°C, stir at constant temperature for 30min, then add 0.1g of ammonium persulfate into the reaction solution, N 2 React under protection for 6 hours. After the reaction, cool naturally to room temperature to obtain polystyrene monodisperse latex particles. Store in a brown glass bottle for later use;

[0038] (2) Preparation of 2D photonic crystals by the needle tip method: the polystyrene latex particles obtained in step (1) and isopropanol are formulated into a mixed solution with a mass fraction of 10 wt%, and after stirring at room temperature, use a syringe with a volume range of 2mL Drop the tip of the needle onto t...

Embodiment 2

[0043] (1) Synthesis of monodisperse latex particles: Add 100 mL of deionized water to a four-necked flask equipped with a condenser, a heating device, nitrogen protection and a stirring device, and after passing through nitrogen to remove oxygen for 30 min, add 4 mL of styrene with a trace amount Add the pipette dropwise into the four-necked flask, raise the temperature to 70°C, and stir at constant temperature for 30 minutes, then add 0.08g of ammonium persulfate into the reaction solution, N 2 React under protection for 6 hours. After the reaction, cool naturally to room temperature to obtain polystyrene monodisperse latex particles. Store in a brown glass bottle for later use;

[0044] (2) Preparation of 2D photonic crystals by the needle tip method: the polystyrene latex particles obtained in step (1) and n-propanol are formulated into a mixed solution with a mass fraction of 15 wt%, and after stirring at room temperature, use a syringe with a range of 2 mL Drop the tip o...

Embodiment 3

[0048] (1) Synthesis of monodisperse latex particles: Add 110mL of deionized water to a four-necked flask equipped with a condenser, heating device, nitrogen protection and stirring device, and after passing through nitrogen to remove oxygen for 30min, add 4.5mL of methacrylic acid Add the methyl ester dropwise into the four-necked flask with a micropipette, raise the temperature to 65°C, and stir at constant temperature for 30 minutes, then add 0.1 g of ammonium persulfate to the reaction solution, N 2 React under protection for 6 hours. After the reaction, naturally cool to room temperature to obtain polymethyl methacrylate monodisperse latex particles, and store them in a brown glass bottle for later use;

[0049] (2) Preparation of 2D photonic crystals by the needle tip method: the polymethyl methacrylate latex particles obtained in step (1) and n-butanol are formulated into a mixed solution with a mass fraction of 8wt%, and after stirring at room temperature, use a measuri...

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Abstract

The invention provides a photonic crystal nano-composite gel membrane with temperature / humidity dual responses. 2D colloidal photonic crystals are prepared with soap-free emulsion polymerization and needle tip flow methods, a nano-composite hydrogel pre-polymerization solution is prepared through introduction of inorganic nanoparticles as a physical crosslinking agent, finally, the 2D colloidal photonic crystals and the nano-composite hydrogel pre-polymerization solution are compounded, and the photonic crystal nano-composite gel membrane with the temperature / humidity dual responses is prepared; the photonic crystal gel membrane serving as a sensor realizes effects of fast response, high toughness and excellent optical signal resolution and achieves the purpose of rapidly detecting outsidetemperature / humidity change through color change. Preparation of the gel membrane comprises steps as follows: (1), synthesis of mono-disperse latex particles; (2), preparation of the 2D colloidal photonic crystals with the needle tip method; (3), preparation of the nano-composite hydrogel pre-polymerization solution; (4), preparation of the responsive photonic crystal nano-composite gel membrane.The preparation method is simple and convenient to operate, and the photonic crystal nano-composite gel membrane is high in color change visibility, optical signal resolution and response rate and can be applied to fast detection of temperature / humidity, metal ions, toxicants, biochemical reagents, environmental pollutants and the like.

Description

technical field [0001] The invention relates to the fields of photonic crystal sensors and nanocomposite gels, in particular to a temperature / humidity dual response photonic crystal nanocomposite gel film and a preparation method thereof. Background technique [0002] In 1987, Eli Yablonovitch (Yablonovitch E. Phys Rev Lett 1987, 58: 2059-2062) and Sajeev John (John S. Phys Rev Lett 1987, 58: 2486-2489) proposed the concept of photonic crystals simultaneously. Photonic crystal (photonic bandgap material) refers to a periodic dielectric structure with "photon bandgap", which satisfies the principle of Bragg diffraction, and light of a certain frequency is prohibited from propagating in it. If the energy of photons is within the frequency range of photon bandgap, then Cannot propagate in medium. [0003] Colloidal crystals are materials with two-dimensional or three-dimensional ordered structures formed by regular arrangement of monodisperse colloidal particles as structural ...

Claims

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Application Information

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IPC IPC(8): C08J7/04G01D21/02B82Y30/00
CPCB82Y30/00C08J7/0427C08J2325/06C08J2333/12C08J2433/02C08J2433/24C08J2433/26G01D21/02
Inventor 张青松刘亚龙穆齐锋陈云生贾舒钧杨超超刘鹏飞陈莉
Owner TIANJIN POLYTECHNIC UNIV
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