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Inorganic magnetic three-dimensional ordered macro-porous material and preparation method thereof

A three-dimensional ordered, macroporous material technology, applied in the direction of magnetic properties of inorganic materials, inorganic ineffective components, etc., can solve the problems of poor magnetic response, expensive synthetic raw materials, and high toxicity of raw materials

Inactive Publication Date: 2010-01-20
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its synthetic raw materials are expensive, the synthetic method is complicated, and the raw materials are highly toxic, which is also not suitable for the application of biological systems.
At the same time, these methods all face the characteristics of poor magnetic response.
So far, there is no report on the facile synthesis of three-dimensional ordered inorganic magnetic macroporous materials with strong magnetic response and high biological adaptability (Galloro, J.; Ginzburg, M.; Miguez, H. .; Yang, S.M.; Coombs, N.; Safa-Sefat, A.; Greedan, J.E.; Manners, I.; Ozin, G.A. Adv. Funct. Mater. 2002, 12, 382.)

Method used

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  • Inorganic magnetic three-dimensional ordered macro-porous material and preparation method thereof

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Effect test

Embodiment 1

[0015] (1) 0.2g of superparamagnetic 10nm Fe 3 o 4 Ultrasonic dispersion of nanoparticles into 20ml 2M HNO 3 Perform pretreatment in the solution for 1-2 minutes, fully wash the magnetic nanoparticles with deionized water, and then ultrasonically disperse them again in a mixed solution of 4.4 g of sodium citrate and 20 ml of deionized water. Finally, the product was separated with a magnet, and dispersed in 5 ml of deionized water to obtain a stable dispersion for later use.

[0016] (2) disperse the polymethyl methacrylate microspheres of 10g 300nm in 300g deionized water, then get 5g of this solution and the above-mentioned Fe 3 o 4 The nanoparticle solutions were mixed, and then the mixture was dried in an oven at 35°C. After drying, put it in an oven at 80°C for 24 hours. The obtained solid was immersed in a mixed solution of 0.9g TEOS, 0.1g 2M HCl, 8g ethanol and 2g deionized water, and stood until the solution evaporated to dryness. The resulting solid was placed i...

Embodiment 2

[0018] (1) 0.2g superparamagnetic 15nm γ-Fe 2 o 3 Ultrasonic dispersion of nanoparticles into 20ml 2M HNO 3 Perform pretreatment in the solution for 1-2 minutes, fully wash the magnetic nanoparticles with deionized water, and then ultrasonically disperse them again in a mixed solution of 4.4 g of sodium citrate and 20 ml of deionized water. Finally, the product was separated with a magnet, and dispersed in 5 ml of deionized water to obtain a stable dispersion for later use.

[0019] (2) Disperse 10g of 380nm polystyrene beads into 300g of deionized water, then take 5g of this solution and the above-mentioned γ-Fe 2 o 3 The nanoparticle solutions were mixed, and then the mixture was dried in an oven at 32°C. After drying, put it in an oven at 80°C for 24 hours. The obtained solid was immersed in a mixed solution of 0.9g TEOS, 0.1g 2M HCl, 8g ethanol and 2g deionized water, and stood until the solution evaporated to dryness. The resulting solid was placed in a 5 ml crucibl...

Embodiment 3

[0021] (1) 0.2g of superparamagnetic 10nm Fe 3 o 4 Ultrasonic dispersion of nanoparticles into 20ml 2M HNO 3 Perform pretreatment in the solution for 1-2 minutes, fully wash the magnetic nanoparticles with deionized water, and then ultrasonically disperse them again in a mixed solution of 4.4 g of sodium citrate and 20 ml of deionized water. Finally, the product was separated with a magnet, and dispersed in 5 ml of deionized water to obtain a stable dispersion for later use.

[0022] (2) Disperse 10g of 1μm polystyrene pellets into 300g of deionized water, and then take 5g of this solution with the above-mentioned Fe 3 o 4 The nanoparticle solutions were mixed, and then the mixture was dried in an oven at 40°C. After drying, put it in an oven at 80°C for 24 hours. The obtained solid was immersed in a mixed solution of 0.9 g TEOS, 0.1 g 2M HCl, 8 g methanol and 2 g deionized water, and stood until the solution evaporated to dryness. The resulting solid was placed in a 5 m...

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Abstract

The invention belongs to the technical field of advanced nano-composite materials and particularly provides an inorganic magnetic three-dimensional ordered macro-porous (3DOM) material and a preparation method thereof. The preparation method comprises the following steps: firstly, dispersing magnetic nano-particles and polymer microspheres in a solution, so that the gaps formed by arranging the polymer microspheres in an ordered manner can be filled with the magnetic nano-particles by the evaporation self-assembly of the solution; then, filling the remaining gaps of the polymer microsphere / magnetic nano-particle composite material with inorganic oxide sol by the nano-casting method, so that the ordered composite structure can be fixed; and finally, calcining in the presence of nitrogen to remove the polymer microspheres, so as to obtain the 3DOM material. The magnetic 3DOM material has the advantages of higher magnetic response and higher stability, and the 3DOM material is provided with ordered macro-pores which are communicated on a three-dimensional basis. Therefore, the invention is widely applicable in the aspects of bio-separation, drug delivery, catalytic loading and the like. The preparation method is simple and the materials are easily available. Therefore, the invention is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of advanced nanocomposite materials, and specifically relates to a three-dimensional ordered inorganic magnetic macroporous material and a synthesis method thereof. Background technique [0002] In recent years, three-dimensional ordered macroporous materials have become a new type of composite materials with broad application prospects due to their special structure. The three-dimensional ordered inorganic magnetic macroporous material with magnetic material doped walls has the magnetic responsiveness of the magnetic material and the structural characteristics of the three-dimensional ordered macroporous material, making it suitable for bioseparation, drug delivery, and catalytic loading. It has broad application prospects. [0003] So far, there have been some reports on the synthesis of three-dimensionally ordered magnetic macroporous materials, but in the existing reports, not only the synthesis steps a...

Claims

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Application Information

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IPC IPC(8): H01F1/01H01F1/09A61K47/02
Inventor 邓勇辉刘嘉赵东元
Owner FUDAN UNIV
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