Magnetic inorganic nano-particle/ordered meso-porous silica core-shell microspheres and preparation thereof
A technology of mesoporous silica and amorphous silica, applied in the direction of fibrous fillers, etc., can solve the problems of poor magnetic response effect of composite materials, uneven shape and disorder of composite materials, etc.
Inactive Publication Date: 2008-06-25
FUDAN UNIV
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Abstract
The invention belongs to the nano-composite material technology field, in particular to a magnetic inorganic nano-particle/ordered mesoporous silica core-shell microsphere and a preparation method thereof. The invention first utilizes sol-gel chemical synthesis method, coats a layer of amorphous silica on the surface of a plurality of magnetic inorganic nano-particles, then utilizes self-assembly of an organic surfactant as structure-directing agent and inorganic species in the solution, coats a layer of ordered meso-structured silica/surfactant composite material on the surface of the magnetic inorganic nano-particle/ silica composite microsphere, removes the surfactant through solvent extraction, and obtains the ordered mesoporous magnetic inorganic nano-particle/silica core-shell structure composite microsphere material. The composite microsphere has high specific surface area, strong magnetic responsiveness, and wide application prospect in bioseparation and bioabsorption. The invention is simple in method, easy in obtaining raw materials, and suitable for large scale production.
Application Domain
Pigmenting treatment
Technology Topic
Chemical synthesisSol-gel +12
Examples
- Experimental program(4)
Example Embodiment
Example Embodiment
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PUM
Property | Measurement | Unit |
Magnetic saturation | 40.8 | emu/g |
Particle size | 410.0 | nm |
Mesopore diameter | 2.1 | nm |
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