Ferromagnetic multiporous silica gel microsphere and its preparation method

A technology of porous silica gel and ferromagnetism, applied in the direction of magnetism of inorganic materials, liquid separation into beads and granulation, etc., can solve the problems of small specific surface area and unsuitable for application, and achieve large specific surface area, easy industrialization, and easy control of conditions Effect
CN1480251AInactive Publication Date: 2004-03-10TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2004-03-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

A ferromagnetic porous silica gel microsphere with 100-450 sq.m / g is composed of microspheric SiO2 particles as basic material and superparamagnetic Fe2O3 nanoparticles dispersed in said basic material. Its preparing process includes preparing Fe2O3 sol, preparing Fe2O3 / SiO2 sol, preparing composite microspheres, and preparing magnetic porous silica gel.
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Description

Technical field

[0001] The invention relates to a method for preparing ferromagnetic porous silica microspheres, which belongs to the preparation technology of magnetic porous silica microspheres. Background technique

[0002] The transmission and separation system controlled by the magnetic field has many applications in the fields of medicine, biology and chemistry, so it has achieved rapid development in recent years. In these systems, an external magnetic field is usually used to control the directional movement of magnetically responsive particles, so it can be used to directionally release specific therapeutic drugs to a certain part of the body, selectively separate cancer cells from bone marrow cells, Extract target molecules from complex biological samples and other fields. The fluidized bed technology controlled by the magnetic field has become a powerful tool in biotechnology. In the preparation and separation, the magnetic support medium can be immobilized relatively ...

Claims

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