Preparation method of multiple response core-shell structure magnetic nanometer aquagel photonic crystals

A technology of nano-hydrogel and core-shell structure, which is applied in the field of preparation of magnetic nano-hydrogel photonic crystals with multiple responsive core-shell structures, can solve problems such as limitations and complex preparation, and achieve good biocompatibility and easy raw materials Good monodisperse effect

Active Publication Date: 2018-05-01
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparations are too complicated and are basically limited to hard-sphere photonic crystals, and soft-sphere-based magnetic nanohydrogel photonic crystals have not been reported.

Method used

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  • Preparation method of multiple response core-shell structure magnetic nanometer aquagel photonic crystals
  • Preparation method of multiple response core-shell structure magnetic nanometer aquagel photonic crystals
  • Preparation method of multiple response core-shell structure magnetic nanometer aquagel photonic crystals

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Experimental program
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Effect test

Embodiment 1

[0041] (1) Dissolve 3.7681g monomer N-isopropylacrylamide NIPAM, 0.0677g crosslinking agent BIS, 0.1508g emulsifier SDS in 250mL deionized water, and blow N at room temperature 2 Deoxygenation, magnetic stirring for 30min, reaction at 70°C for 30min under nitrogen atmosphere, then dissolve 0.1687g initiator APS in 10mL deionized water, add the above solution, keep nitrogen atmosphere, continue reaction for 4h, and then use The dialysis bag was soaked in deionized water for 7 days, and the water was changed three times a day to remove the residual reaction raw materials and electrolytes in the reaction system to obtain the temperature-sensitive nano-hydrogel PNIPAM.

[0042] (2) Dilute 90 mL of PNIPAM obtained in step (1) 6 times with deionized water, add 1.8752 g of cross-linking agent BIS, magnetically stir for 30 min under nitrogen atmosphere, add 9.0658 g of monomeric acrylic acid AA under ice bath and magnetically stir for 20 min, and then With 0.6102g initiator APS, 0.610...

Embodiment 2

[0048] (1) Dissolve 3.7954g monomer N-isopropylacrylamide NIPAM, 0.0672g cross-linking agent BIS, 0.1521g emulsifier SDS in 250mL deionized water, and blow N at room temperature 2 Deoxygenation, magnetic stirring for 30min, reaction at 70°C for 30min under nitrogen atmosphere, then dissolve 0.1668g initiator APS in 10mL deionized water, add the above solution, keep nitrogen atmosphere, continue reaction for 4h, and then use The dialysis bag was soaked in deionized water for 7 days, and the water was changed three times a day to remove the residual reaction raw materials and electrolytes in the reaction system to obtain the temperature-sensitive nano-hydrogel PNIPAM.

[0049] (2) Dilute 90 mL of PNIPAM obtained in step (1) 6 times with deionized water, add 1.8321 g of cross-linking agent BIS, magnetically stir for 30 min under nitrogen atmosphere, add 8.9958 g of monomeric acrylic acid AA under ice bath and magnetically stir for 20 min, then With 0.6023g initiator APS, 0.6023g ...

Embodiment 3

[0056] (1) Dissolve 3.8156g monomer N-isopropylacrylamide NIPAM, 0.0654g crosslinking agent BIS, 0.1498g emulsifier SDS in 250mL deionized water, and blow N at room temperature 2 Deoxygenation, magnetic stirring for 30min, reaction at 70°C for 30min under nitrogen atmosphere, then dissolve 0.1654g initiator APS in 10mL deionized water, add the above solution, keep nitrogen atmosphere, continue reaction for 4h, and then use The dialysis bag was soaked in deionized water for 7 days, and the water was changed three times a day to remove the residual reaction raw materials and electrolytes in the reaction system to obtain the temperature-sensitive nano-hydrogel PNIPAM.

[0057](2) Dilute 90 mL of PNIPAM obtained in step (1) 6 times with deionized water, add 1.8547 g of cross-linking agent BIS, magnetically stir for 30 min under a nitrogen atmosphere, add 9.1246 g of monomeric acrylic acid AA for 20 min under ice bath, and then With 0.6054g initiator APS, 0.6054g catalyst Na 2 S ...

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Abstract

The invention relates to a preparation method of multiple response core-shell structure magnetic nanometer aquagel photonic crystals. The method comprises the following steps that NIPAM, crosslinkingagents, emulsifying agents and initiators are mixed for reaction to obtain PNIPAM; dilution is performed by de-ionized water; crosslinking agents, AA, initiators and catalysts are sequentially added for continuous stirring and reaction; PNIPAM/PAA of an IPN structure is obtained; concentration is performed to 1/2 of the original mass concentration; reaction is performed with Fe<2+>, NaNO2 and ammonia water to obtain IPN/Fe3O4; NIPAM, crosslinking agents and initiators are added for reaction to obtain PNIPAM@(IPN/Fe3O4); concentration is performed to 2 to 8 weight percent; self assembly is performed to obtain the multiple response core-shell structure magnetic nanometer aquagel photonic crystals. The method has the advantages that the process is simple; the raw materials can be easily obtained; the green and environment-friendly effects are achieved; the prepared product has the core-shell structure and the temperature/pH/magnetic triplex response performance; great application prospects are realized in the fields of optics and biomedicine.

Description

technical field [0001] The invention belongs to the technical field of nano hydrogel photonic crystals, in particular to a method for preparing magnetic nano hydrogel photonic crystals with multiple responsive core-shell structures. Background technique [0002] A photonic crystal is a material with a periodic structure that is composed of two or more materials with different refractive indices arranged in a certain space. This unique periodic structure will cause "Bragg scattering" of electromagnetic waves. When the refractive index of the material is large enough, light will be blocked when propagating, thus forming a "photon forbidden band". When the frequency of light waves falls in the forbidden band In the middle, light cannot propagate. [0003] A three-dimensional photonic crystal material constructed of polymer colloidal particles with stimuli-responsive properties can sense changes in the external environment sensitively and quickly. By adjusting the spatial arra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F222/38C08J3/075C08F220/06C08K3/22C08L33/24C08L33/02
CPCC08F220/06C08F220/54C08J3/075C08J2333/02C08J2333/24C08J2433/24C08K3/22C08K2003/2275C08K2201/01C08F222/385
Inventor 鲁希华李晓晓李雪婷
Owner DONGHUA UNIV
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