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Magnetic inorganic nano corpuscle/zeolite nucleocapsid type composite microsphere and preparation method thereof

A technology of inorganic nanoparticles and magnetic nanoparticles, which is applied in the fields of magnetism of inorganic materials, treatment of inorganic pigments, chemical instruments and methods, etc., can solve the problems of no reports of inorganic magnetic nanoparticles/zeolite core-shell composite microspheres, etc., and the method is simple Rapid, high degree of crystallization, easy to obtain raw materials

Inactive Publication Date: 2008-11-05
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no report on the synthesis of inorganic magnetic nanoparticles / zeolite core-shell composite microspheres

Method used

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  • Magnetic inorganic nano corpuscle/zeolite nucleocapsid type composite microsphere and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) 0.03g of superparamagnetic 500nm NiFe 2 o 4 The nano-microspheres were ultrasonically dispersed into 5ml 1M HCl solution for pretreatment, the magnetic particles were fully washed with deionized water, and then ultrasonically dispersed into a mixture of 100g ethanol, 30g deionized water and 1g concentrated ammonia water. Subsequently, 1.0 g TEOS was added and stirred for 12 h, and finally the product was separated by a magnet, washed with water and ethanol and dispersed into deionized water to obtain a stable dispersion (4.0 wt%) for later use.

[0017] (2) 5.0g of NiFe prepared above 2 o 4 @SiO 2 Microsphere dispersion and 1.0g polydimethyldiallylammonium chloride (PDDA) (Mw=20000g / mol) 1% aqueous solution are mixed, and PDDA is adsorbed on NiFe 2 o 4 @SiO 2 surface. Washing PDDA-adsorbed NiFe with 2.0% ammonia solution 2 o 4 @SiO 2 The microspheres were separated by a magnet, and after repeated 4 times, the NiFe adsorbed PDDA 2 o 4 @SiO 2 The microsph...

Embodiment 2

[0019] (1) 400nm 0.03g superparamagnetic γ-Fe 2 o 3 The nano-microspheres were ultrasonically dispersed into 5ml 2M HCl solution for pretreatment, the magnetic particles were fully washed with deionized water, and then ultrasonically dispersed into a mixture of 100g ethanol, 30g deionized water and 1g concentrated ammonia water. Subsequently, 2.0 g TEOS was added and stirred for 12 h, and finally the product was separated by a magnet, washed with water and ethanol and dispersed in deionized water to obtain a stable dispersion (5.0 wt%) for later use.

[0020] (2) 5.0g of γ-Fe prepared above 2 o 3 @SiO 2Microsphere dispersion and 2.0g polydimethyldiallylammonium chloride (PDDA) (Mw=20000g / mol) 1% aqueous solution are mixed, and PDDA is adsorbed to Fe 3 o 4 @SiO 2 surface. Wash the PDDA-adsorbed γ-Fe with 2.0% ammonia solution 2 o 3 @SiO 2 The microspheres were separated by a magnet, and after repeated 4 times, the γ-Fe adsorbed by PDDA 2 o 3 @SiO 2 The microspheres...

Embodiment 3

[0022] (1) 0.02g superparamagnetic Fe 3 o 4 The nano-microspheres were ultrasonically dispersed into 5ml 2M HCl solution for pretreatment, the magnetic particles were fully washed with deionized water, and then ultrasonically dispersed into a mixture of 100g ethanol, 30g deionized water and 1g concentrated ammonia water. Subsequently, 1.0 g TEOS was added and stirred for 12 h, and finally the product was separated by a magnet, washed with water and ethanol and dispersed into deionized water to obtain a stable dispersion (4.0 wt%) for later use.

[0023] (2) the 5.0g of Fe obtained above 3 o 4 @SiO 2 Microsphere dispersion and 2.0g polydimethyldiallylammonium chloride (PDDA) (Mw=20000g / mol) 1% aqueous solution are mixed, and PDDA is adsorbed to Fe 3 o 4 @SiO 2 surface. Wash the PDDA-adsorbed Fe with 2.0% ammonia solution 3 o 4 @SiO 2 The microspheres were separated by a magnet, and after repeated 4 times, the Fe adsorbed on PDDA 3 o 4 @SiO 2 The microspheres were d...

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Abstract

The invention belongs to the technical field of the advanced nanometre composite material, particularly to magnetic inorganic nano-particle / zeolite putamen compound microsphere and the preparation method. The invention first adopts the collosol-gel chemical synthesis, wraps a layer of amorphous silica on the external surface of the magnetic inorganic nano-particle, then uses the layer by layer self-assembly technology to adsorb the polyelectrolyte with positive charge and the zeolite nano-particle with negtive charge on the magnetic microsphere surface with negtive charge, finally wraps a layer of zeolite materials on the exterior of the magnetic microsphere through the air-solid phase crystal transformation technology, thereby obtaining the magnetic zeolite compound microsphere with the putamen structure. The compound microsphere has strong magnetic responsibility, and the surface can adsorb a great deal of polypeptide, thereby having wide application foreground on the aspect of bioseparation and high efficiency proteid enzymolysis. The invention has simple method, easy obtaining of the raw materials, which is suitable for the enlarged production.

Description

technical field [0001] The invention belongs to the field of advanced nanocomposite materials and nanotechnology, and specifically relates to a composite microsphere of inorganic magnetic nanoparticles / zeolite with a core-shell structure and a synthesis method thereof. technical background [0002] In recent years, core-shell composite microspheres have become a new type of composite material with broad application prospects because they can simultaneously utilize the advantages of their core and shell layers. Composite microspheres that use magnetic materials as the core layer and inorganic silica molecular sieves as the shell layer, because they combine the magnetic responsiveness of magnetic materials and the characteristics of large surface area and easy functionalization of silica molecular sieve materials, are used in biological separation. , The solidification of proteins and peptides has broad application prospects. [0003] However, so far, the synthesis of core-sh...

Claims

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Application Information

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IPC IPC(8): H01F1/11B22F1/02C04B35/622C09C3/06C09C3/10
Inventor 邓勇辉刘翀刘嘉赵东元
Owner FUDAN UNIV
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