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Method for preparing magnetic response photonic crystal gel through front-end polymerization

A technology of photonic crystals and front-end polymerization, applied in gel preparation, chemical instruments and methods, colloid chemistry, etc., can solve the problems of time-consuming, cumbersome steps, high energy consumption, etc. low effect

Inactive Publication Date: 2020-02-28
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, magnetically responsive photonic crystal gels are generally prepared by traditional free radical polymerization or photocuring methods. These methods have problems such as time-consuming, high energy consumption, and cumbersome steps. Therefore, a method for rapidly preparing magnetically responsive photonic crystal gels is sought. received extensive attention from researchers

Method used

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  • Method for preparing magnetic response photonic crystal gel through front-end polymerization
  • Method for preparing magnetic response photonic crystal gel through front-end polymerization
  • Method for preparing magnetic response photonic crystal gel through front-end polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 0.54g of ferrocene was dissolved in 42.5g of acetone. After ultrasonic dispersion for 30 minutes, 1.7ml of hydrogen peroxide was slowly added dropwise. After magnetic stirring for 2h, the solution was transferred to the reactor, heated and maintained at 220°C. After 72 hours, the reaction kettle was naturally cooled to room temperature, magnetized separation and drying were collected to obtain magnetic ferroferric oxide nanoparticles with a particle size of 177nm, and 0.02g of magnetic particles with an average particle size of about 177nm were dispersed in 2g of N,N-dimethyl In the base formamide solvent, ultrasonically disperse until a uniform solution is obtained. Add 2.16g of methylol acrylamide, 1.44g of N-vinylcaprolactam, 0.5g of β-cyclodextrin, and ultrasonically disperse uniformly. Continue to add 0.1g initiator benzoyl peroxide and crosslinking agent N,N'- to the above solution. 0.2g methylene bisacrylamide, shake quickly and stir evenly. The final mixture is ...

Embodiment 2

[0028] 0.54 g of ferrocene was dissolved in 42.5 g of acetone, and after ultrasonic dispersion for 30 minutes, 1.4 ml of hydrogen peroxide was slowly added dropwise, and after magnetic stirring for 2 hours, the solution was transferred to the reactor, heated and maintained at 230°C. After 60 hours, the reaction kettle was naturally cooled to room temperature, magnetic separation and drying were collected to obtain magnetic ferroferric oxide nanoparticles with a particle size of 135 nm, and 0.03 g of magnetic particles with an average particle size of about 135 nm were dispersed in 2.5 g of dimethyl sulfoxide. In the solvent, ultrasonic dispersion until a homogeneous solution is obtained. Add 2g of N,N-dimethylacrylamide, 1g of N-vinylcaprolactam, 0.6g of β-cyclodextrin, ultrasonic dispersion, continue to add the initiator 0.05g of azobisisobutyronitrile, crosslinker diethylene 0.08g of base benzene, shake quickly and stir evenly. The final mixed solution was transferred to a t...

Embodiment 3

[0030] 0.54g of ferrocene was dissolved in 42.5g of acetone, and after ultrasonic dispersion for 30 minutes, 2.1ml of hydrogen peroxide was slowly added dropwise, and after magnetic stirring for 2h, the solution was transferred to the reactor, heated and maintained at 200°C. After 80h, the reaction kettle was naturally cooled to room temperature, magnetic separation and drying were collected to obtain magnetic ferroferric oxide nanoparticles with a particle size of 215nm, and 0.02g magnetic particles with an average particle size of about 215nm were dispersed in 2.2g 1-methyl- Disperse ultrasonically in 2-pyrrolidone solvent until a uniform solution is obtained. Add 1.4g of acrylamide, 0.4g of N-isopropylacrylamide, 0.4g of β-cyclodextrin, and ultrasonically disperse uniformly. Continue the above solution to add 0.1g of initiator azobisisoheptonitrile and crosslinker of dimethacrylic acid. The ethanol ester 0.05g is quickly shaken and stirred evenly. The final mixed solution w...

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Abstract

The invention discloses a method for preparing a magnetic response photonic crystal gel through front-end polymerization. The preparation method comprises the following steps: dissolving magnetic ferroferric oxide nanoparticles, a vinyl monomer, beta-cyclodextrin, an initiator and a cross-linking agent into an organic solvent; preparing a uniform solution, transferring the uniform solution into atest tube, vertically or parallelly fixing a magnet at the bottom or the periphery of the test tube, heating the liquid level of the uniform solution in the test tube through an electric soldering iron, initiating polymerization reaction, and finally obtaining the photonic crystal gel through fixing magnetic photonic crystal structures in a gel network after front-end polymerization is finished. In the polymerization reaction process, no external heat source is needed for maintaining polymerization of the whole system, controllability is achieved, the polymerization reaction time is short, energy is saved, and pollution is avoided; through combination of magnet control and thermal polymerization, one-step rapid preparation of the photonic crystal gel is realized, a method is provided for rapid preparation of the magnetic photonic crystal, and the method has a very high application value in industrial production.

Description

Technical field [0001] The invention relates to the technical field of preparation of functional polymer materials, in particular to a method for preparing a magnetic response photonic crystal gel by front-end polymerization. Background technique [0002] Magneto-responsive photonic crystal gel materials are favored by researchers because of their rapid response to magnetic fields, remote control and convenient application of external fields. The magnetically responsive photonic crystal gel formed by magnetically induced self-assembly can quickly respond to changes in the magnetic field and achieve a huge change in diffraction color. Its development provides a new platform for the application of stimulus-responsive color-changing materials. At present, magnetically responsive photonic crystal gels are generally prepared by traditional free radical polymerization or photo-curing methods. These methods have problems such as time-consuming, high energy consumption, and cumbersome st...

Claims

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Application Information

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IPC IPC(8): C08L51/02C08K3/22B01J13/00
CPCC08K3/22B01J13/0065C08K2003/2275C08K2201/011C08K2201/003C08L51/02
Inventor 刘思思陈苏汪晓巧李晴
Owner NANJING UNIV OF TECH
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