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Preparation method of chiral-magnetic hydrogel

A hydrogel and chiral technology, applied in the field of chiral-magnetic hydrogel preparation, can solve problems such as disappearance, hindering the charge transfer process of chiral materials, and weakening chirality, so as to maintain integrity, rapid preparation and The effect of simple detection and process

Pending Publication Date: 2022-04-26
WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional inorganic chiral nanomaterials are mainly constructed by introducing chiral ligands or constructing helical structures and other electric dipole moment regulation methods, but such chiral materials usually show certain environmental instability. Chirality will weaken or even disappear under the chemical environment
In addition, these chiral materials have poor conductivity due to the introduction of long-chain chiral molecules as surface ligands, which seriously hinder the charge transfer process between chiral materials and their surface reactants or electrode materials, which greatly limits their practical applications. application

Method used

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  • Preparation method of chiral-magnetic hydrogel
  • Preparation method of chiral-magnetic hydrogel
  • Preparation method of chiral-magnetic hydrogel

Examples

Experimental program
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Embodiment 1

[0038]The steps of this embodiment are as follows: at room temperature, 2mmol ferric chloride and 2mmol L-valine are dissolved together in 40mL glycerin / water mixed solvent (volume ratio is 1:3) and magnetically stirred until clarification; then in the above solution After adding 10mmol of urea in the solution, transfer it to a 100mL polytetrafluoroethylene-lined autoclave, set the reaction temperature in the oven to 200°C, and react at this temperature for 12h. After the reaction is completed, use deionized water to wash three times, and re- Dispersed in deionized water to obtain L-valine modified γ-Fe 2 o 3 Nanoparticle deionized aqueous solution (Fe element content is 4.2mg / mL); the synthesized L-valine-modified γ-Fe 2 o 3 Nanoparticle deionized aqueous solution and 20w% acrylamide AA, 1v% methylenebisacrylamide TMED, 1w% tetramethylethylenediamine NMBA and 5w% potassium persulfate KPS in volume ratio (AA:NMBA:TMED:KPS: NPs=10:3:3:4:5) mixed, and added to a four-way quar...

Embodiment 2

[0040] The steps of this embodiment are as follows: at room temperature, 2mmol ferric chloride and 2mmol L-valine are dissolved together in 40mL glycerin / water mixed solvent (volume ratio is 1:3) and magnetically stirred until clarification; then in the above solution After adding 10mmol of urea in the solution, transfer it to a 100mL polytetrafluoroethylene-lined autoclave, set the reaction temperature in the oven to 200°C, and react at this temperature for 12h. After the reaction is completed, use deionized water to wash three times, and re- Dispersed in deionized water to obtain L-valine modified γ-Fe 2 o 3 Nanoparticle deionized aqueous solution (Fe element content is 4.2mg / mL); the synthesized L-valine-modified γ-Fe 2 o 3 Nanoparticle deionized aqueous solution and 20w% acrylamide AA, 1v% methylenebisacrylamide TMED, 1w% tetramethylethylenediamine NMBA and 5w% potassium persulfate KPS in volume ratio (AA:NMBA:TMED:KPS: NPs=10:3:3:4:5) mixed, and added to a four-way qua...

Embodiment 3

[0042] The steps of this embodiment are as follows: 2mmol ferric chloride and 2mmol D-valine are dissolved together in 40mL glycerin / water mixed solvent (volume ratio is 1:3) at room temperature, and magnetically stirred until clarification; Add 10mmol urea to the solution and transfer it to a 100mL polytetrafluoroethylene-lined autoclave. Set the reaction temperature in the oven to 200°C and react at this temperature for 12h. After the reaction is completed, use deionized water to wash three times and re- Dispersed into deionized water; the synthesized D-valine modified γ-Fe 2 o 3 Nanoparticles (NPs) deionized aqueous solution with a concentration of 20wt.% AA, a concentration of 1vol.% TMED, a concentration of 1wt.% NMBA and a concentration of 5wt.% KPS aqueous solution by volume ratio (AA:NMBA:TMED: KPS:NPs=10:3:3:4:5) mixed, and added to a four-way quartz cuvette and reacted at room temperature for 10min; the quartz cuvette was placed in a 1T parallel magnetic field and m...

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Abstract

The invention relates to the technical field of optical materials, in particular to a preparation method of chiral-magnetic hydrogel, which comprises the following steps: modifying magnetic nanoparticles by using a chiral ligand to obtain chiral ligand modified magnetic nanoparticles; mixing the chiral ligand modified magnetic nanoparticles with a hydrogel monomer, a cross-linking agent, a catalyst and an initiator to prepare magnetic hydrogel; the prepared magnetic hydrogel is placed in a parallel magnetic field to be directionally magnetized, and the chiral-magnetic hydrogel is obtained. After the magnetic hydrogel prepared by the method is directionally magnetized, a local magnetic field can be formed in the hydrogel, the optical activity of the material can be adjusted by the local magnetic field, and the overall optical activity of the material also changes along with the change of the magnetic field intensity.

Description

technical field [0001] The invention relates to the technical field of optical materials, in particular to a preparation method of chiral-magnetic hydrogel. Background technique [0002] Chirality refers to the phenomenon that an object and its mirror image cannot completely coincide. As an important geometric conformation, chirality participates in the operation of the entire ecological circle as an indispensable factor in nature. In nature, biomolecules such as climbing plants, snail shells, horseshoe flowers, and proteins, amino acids, and DNA all exhibit obvious chiral characteristics. In the 19th century, Pasteur discovered that when linearly polarized light passes through a solution of tartaric acid enantiomers, the linearly polarized light will rotate in the opposite direction. This ability to rotate the plane of polarization is called optical rotation, also known as is optically active. This deflection ability is usually characterized by chiral molecules using circ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08L33/26C08K9/04C08K3/22C08F220/56C08F222/38
CPCC08J3/075C08F220/56C08J2333/26C08K2201/01C08K2201/011C08K2003/2275C08K9/04C08K2003/2272C08F222/385
Inventor 高小青孙超
Owner WENZHOU INST UNIV OF CHINESE ACAD OF SCI
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