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Magnetic responsive photonic crystal, and simple large-scale preparation method and application thereof

A magnetically responsive, photonic crystal technology, applied in the field of nanomaterials, which can solve problems such as application limitations

Inactive Publication Date: 2020-02-14
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, Yin Yadong and others at the University of California, Riverside synthesized polyacrylic acid (PAA)-modified Fe for the first time by high-temperature hydrolysis. 3 o 4 Colloidal nanocrystal cluster particles (Fe 3 o 4 CNCs), when these particles are dispersed in an aqueous solution, they can be arranged into a one-dimensional stable nano-chain structure under the action of an external magnetic field to diffract visible light, and can achieve full-spectrum reversible discoloration (450-730nm) (Angew.Chem.Int. Ed.2007,46,7428); but the material can only develop color in aqueous solution, so its application is greatly limited
In 2016, He Le of Soochow University and others used PAA as a stabilizer to synthesize Fe with an adjustable particle size between 100 and 160 nm by a one-step solvothermal method. 3 o 4 Colloidal nanoparticles, and the particles of a specific size can also achieve full-spectrum reversible discoloration (470-780nm) in aqueous solution; in addition, this method is easy to scale up, and the single-batch yield can reach nearly 1.9g (Nanoscale, 2016 ,8,19036), but the material synthesized by this method can only change color in aqueous solution

Method used

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  • Magnetic responsive photonic crystal, and simple large-scale preparation method and application thereof
  • Magnetic responsive photonic crystal, and simple large-scale preparation method and application thereof
  • Magnetic responsive photonic crystal, and simple large-scale preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Add 40mL of ethylene glycol to a 100mL three-necked flask, add 0.5g of PSSMA (3:1) under mechanical stirring (1180rpm) and continue stirring for 10 minutes, then add 1.084g of ferric chloride hexahydrate and continue stirring for 10 minutes. Immediately afterwards, 3.0 g of sodium acetate trihydrate was added and stirring was continued for 30 minutes. After the solution changed from yellow to brownish red, the reaction solution was transferred to a 100 mL reactor and reacted in a closed manner at 200° C. for 10 h. After the reaction, it was cooled to room temperature, and the product was washed and magnetically separated with deionized water three times, and then dispersed in 20 mL of deionized water (concentration: 13.68 mg / mL). The solid product in the solution was 273.5 mg.

Embodiment 2

[0088] The difference between this example and Example 1 is that the dosage of PSSMA (3:1) is 1.5g. The prepared product was washed with deionized water and magnetically separated for three times, and then dispersed in 20 mL of deionized water (concentration: 13.03 mg / mL). The solid product in the solution was 260.6 mg.

Embodiment 3

[0090] The difference between this example and Example 1 is that the dosage of PSSMA (3:1) is 2.5g. The prepared product was washed with deionized water and magnetically separated for three times, and then dispersed in 20 mL of deionized water (concentration: 11.18 mg / mL). The solid product in the solution was 223.6 mg.

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Abstract

The invention discloses a magnetic responsive photonic crystal, and a simple large-scale preparation method and an application thereof. The structure of the magnetic responsive photonic crystal comprises a one-dimensional stable nano-chain structure assembled by Fe3O4 colloidal nanoparticles under the action of an external magnetic field; the Fe3O4 colloidal nanoparticles comprise aggregated Fe3O4nanocrystals, the surfaces of the Fe3O4 colloidal nanoparticles are covered with poly(4-styrenesulfonic acid-co-maleic acid) sodium salt (the molar ratio of benzenesulfonic acid to maleic acid is 3:1), and the highest Zeta potential value of the surfaces of the Fe3O4 colloidal nanoparticles is not less than -40 mV. The PSSMA-modified Fe3O4 colloidal nanoparticles are synthesized by a one-step solvothermal method, can be well dispersed in water and various non-aqueous solvents, can realize full-spectrum reversible discoloration under the action of an externally added magnetic field, and are brighter in color. And the preparation method is easy to amplify, and the amplified and synthesized Fe3O4 colloidal photonic crystal can still realize full-spectrum discoloration.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and relates to a magnetically responsive photonic crystal and its simple large-scale preparation method and application, in particular to a photonic crystal based on superparamagnetic ferric iron tetroxide colloidal nanocrystal clusters, and its simple scale Chemical preparation methods and applications. Background technique [0002] Magnetically responsive photonic crystals refer to photonic crystal materials whose photonic bandgap can change with the change of the applied magnetic field. It has the characteristics of convenient external field application, fast response speed, wide bandgap control range, continuous and reversible structural color change, and beautiful colors, so it has broad application prospects in the fields of color rendering technology, anti-counterfeiting, sensing, and imaging. In recent years, ferric oxide (Fe 3 o 4 ) The study of magnetically responsive photonic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00C01G49/08
CPCB01J13/00C01G49/08
Inventor 程昌敬潘丽婷彭焯余海溶梁婷
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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