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Preparation method of polymer photonic crystal with photonic band gap capable of being adjusted in wide range

A technology of photonic crystals and photonic band gaps, which is applied in the field of polymer photonic crystal preparation, can solve the problems of three-dimensional photonic crystals that are difficult to order in a large area, limited response range, and uneven material color, and achieve excellent size monodisperse properties, Easy deposition assembly, high color purity effect

Active Publication Date: 2013-07-10
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of three-dimensional photonic crystal is difficult to order in a large area, and the prepared material has uneven color, poor stability and limited response range.
At the same time, the preparation method of three-dimensional photonic crystal is complicated and the cost is high, which limits its application to a certain extent.

Method used

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  • Preparation method of polymer photonic crystal with photonic band gap capable of being adjusted in wide range
  • Preparation method of polymer photonic crystal with photonic band gap capable of being adjusted in wide range
  • Preparation method of polymer photonic crystal with photonic band gap capable of being adjusted in wide range

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Put N,N dimethylacrylamide (2mL), styrene (5mL), emulsifier (SDS, 0.05g) and deionized water (150mL) into a reaction vessel by emulsion polymerization, and put The reactor was placed in a water bath, first mechanically stirred (400r / min) at room temperature and nitrogen was blown for 30 minutes to make the micelles in the system evenly distributed. Then the temperature was raised to 70°C, and an initiator (KPS, 0.30 g) was added to react for 8 hours to obtain monodisperse hydrogel polymer microspheres with a particle size of 180 nm. The reaction product was centrifuged and washed 3 times with deionized water to remove unreacted monomer and initiator.

[0028] (2) The hydrogel polymer microspheres with uniform size obtained in step (1) are assembled into polymer photons by centrifugal deposition (through a high-speed centrifuge, centrifugal deposition at a speed of 80,000r / min for 30min) Crystals (PCCs, three-dimensional hexagonal close-packed structure, mass m≥5.0g...

Embodiment 2

[0031] (1) Through emulsion polymerization, put N isopropylacrylamide (5mL), α-methylstyrene (5mL), emulsifier (SDBS, 0.05g) and deionized water (300mL) into a reaction vessel , put the reactor in a water bath, first mechanically stir (400r / min) at room temperature and blow nitrogen for 30 minutes, so that the micelles in the system are evenly distributed. The temperature was raised to 70° C., and then an initiator (KPS, 0.45 g) was added to react for 8 hours. Monodisperse hydrogel polymer microspheres with a particle size of 150 nm were obtained, and the reaction product was centrifuged and washed 3 times with deionized water to remove unreacted monomers and initiators.

[0032] (2) The hydrogel polymer microspheres with uniform size obtained in step (1) are assembled into polymer photonic crystals by means of centrifugal deposition (through a high-speed centrifuge, centrifugal deposition at a speed of 100,000r / min for 30min) (PCCs, three-dimensional hexagonal close-packed s...

Embodiment 3

[0035] (1) Put glycidyl methacrylate (2mL), divinylbenzene (5mL) and deionized water (150mL) into a reaction vessel (SDS, 0.0g) by means of emulsion polymerization. Place the device in a water bath, first mechanically stir (400r / min) at room temperature and blow nitrogen for 30 minutes, so that the micelles in the system are evenly distributed. Afterwards, the temperature was raised to 70° C., and then an initiator (SPS, 0.30 g) was added to react for 8 hours. Monodisperse hydrogel polymer microspheres with a particle size of 200 nm were obtained, and the reaction product was centrifuged and washed 3 times with deionized water to remove unreacted monomers and initiators.

[0036] (2) The hydrogel polymer microspheres with uniform size obtained in step (1) are assembled into polymer photonic crystals by means of centrifugal deposition (through a high-speed centrifuge, centrifugal deposition at a speed of 50,000r / min for 60min) (PCCs, three-dimensional hexagonal close-packed st...

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Abstract

The invention belongs to a field of high-molecular material, and relates to a preparation method of a polymer photonic crystal with a photonic band gap capable of being adjusted in a wide range of UV-visible-near infrared. The method comprises firstly synthesizing polymer hydrogel polymer microsphere with monodisperse size, obtaining the polymer photonic crystal through centrifugation, deposition and other ways, adjusting content of injected water so that a dimensional ordered structure of the microsphere of the polymer photonic crystal occurs controllable volume expansion, and furthermore adjustability of crystal lattice period of the ordered structure becomes large, and a peak position of a diffraction spectrum occurs redshift, thereby obtaining the polymer photonic crystal with the photonic band gap in a wide range of UV-visible-near infrared. The polymer photonic crystal can be used for preparing sensitive optical path conversion devices. The material capable of rapidly responding according to external environmental stimulation and obtaining synchronous signal conversion develops a polymer responsive material system, and has important application value in aspects of sensor elements, optical information storage and regulation, and biological monitoring.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a preparation method of a polymer photonic crystal whose photon band gap can be adjusted in a wide range of ultraviolet-visible-near-infrared. Background technique [0002] Photonic crystals were independently proposed by S.John and E.Yablonovitch in 1987. They are artificial microstructures formed by periodic arrangements of media with different refractive indices. Due to the spatial periodicity of the dielectric constant, it causes the periodic change of the spatial refractive index. When the change of the dielectric constant is large enough and the change period is equivalent to the wavelength of light, the dispersion relationship of the light wave appears a band structure, that is, the photonic band structure. These prohibited frequency intervals are called "photonic frequency band gaps", and light or electromagnetic waves whose frequencies fall in the forbidden band are strict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/58C30B5/00C08F212/08C08F220/54C08F212/12C08F212/36C08F220/32C08F2/22
Inventor 林权马骋杨旭东王传洗董凤霞杨柏崔占臣
Owner JILIN UNIV
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