Preparation method of porous magnetic polystyrene microspheres

A technology of polystyrene microspheres and polyvinylpyrrolidone is applied in the direction of magnetism of organic materials/organic magnetic materials to achieve uniform distribution, uniform distribution of micropores and good shape.
CN102964539AActive Publication Date: 2013-03-13NANJING FORESTRY UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING FORESTRY UNIV
Publication Date
2013-03-13

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Abstract

The invention discloses a preparation method of porous magnetic polystyrene microspheres. The method comprises steps of: (1) adding dry Fe3O4 magnetic nanoparticles into an aqueous ethanol solution, treating with ultrasonic, adding vinyltriethoxysilane, transferring into a reactor together, stirring under a constant temperature and a nitrogen atmosphere for aging, and then washing, drying under vacuum and grinding the obtained product into powder; (2) mixing the powder obtained in the step (1) and benzoyl peroxide, and then adding into styrene containing a pore forming agent and a cross-linking agent for the ultrasonic treating; (3) dissolving polyvinylpyrrolidone and sodium dodecyl sulfate into water by using the ultrasonic; and (4) adding the liquid obtained in the step (2) into the liquid obtained in the step (3), treating with the ultrasonic, pouring the obtained mixture into a reactor, heating for condensation reflux to obtain a suspension liquid, separating with magnet, washing with ethanol, re-separating with the magnet, re-washing with pure water, drying under vacuum and grinding to obtain claybank powdery product, extracting with a soxhlet way, and drying under vacuum to obtain the finish product.
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Description

technical field

[0001] The invention relates to a preparation method of porous magnetic polymer microspheres, in particular to a preparation method of porous magnetic polystyrene microspheres. Background technique

[0002] With the development of life sciences, rapid and efficient separation and analysis of biomacromolecules has attracted more and more attention. As a separation method developed in recent years, biomagnetic separation technology has the advantages of high efficiency, rapidity, less solvent consumption, and easy automation, and is popular in the fields of biology, biotechnology, and biomedicine. Biomagnetic separation requires magnetic balls with regular spherical shape, uniform particle size, good dispersion, strong magnetic response, and superparamagnetism. In order to make biomagnetic separation technology more widely used, magnetic spheres with carboxyl, hydroxyl, epoxy, amine and other functional groups on the surface should be prepared. Magnetic sphere...

Claims

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