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Preparation method of epoxy functional core-shell structure magnetic polymer microsphere

A core-shell structure, epoxy function technology, applied in the field of functional materials, can solve the problems of cumbersome preparation process, time-consuming, multiple steps, etc., and achieve the effect of simple preparation process, narrow particle size distribution and uniform structure

Inactive Publication Date: 2013-09-18
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the above methods can obtain magnetic polymer microspheres with high magnetic content and structure, and controllable particle size, these methods require multiple steps, and the preparation process is cumbersome and time-consuming.

Method used

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  • Preparation method of epoxy functional core-shell structure magnetic polymer microsphere
  • Preparation method of epoxy functional core-shell structure magnetic polymer microsphere
  • Preparation method of epoxy functional core-shell structure magnetic polymer microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 To prepare magnetic polymer microspheres with a shell thickness of about 20 nm and a magnetic core particle size of about 300 nm, the specific steps are as follows:

[0023] The first step: preparation of polyethylene glycol (MW 1000) stabilized Fe3O4 nanoclusters

[0024] Take 1.5 g of iron sulfate (Fe 2 (SO 4 ) 3 ), 1.6 g of polyethylene glycol (PEG), 3.4 g of potassium acetate (KAc), dissolved in 70 ml of ethylene glycol, and then transferred to a 250 ml three-necked flask, mechanically stirred at room temperature for 1 h , the liquid in the flask was transferred to a high-pressure reactor with a capacity of 100 ml and lined with polytetrafluoroethylene, and then the reactor was placed in an oven at 180 °C for 12 h and then taken out, and cooled rapidly with tap water to At room temperature, the product is finally washed by magnetic separation, and unreacted reactants are removed by washing with absolute ethanol and deionized water, respectively, unt...

Embodiment 2

[0029] Example 2 Prepare magnetic polymer microspheres with a shell thickness of about 50 nm and a magnetic core particle size of about 300 nm. The specific steps are as follows:

[0030] The first step: the preparation of polyethylene glycol (MW 1000) stabilized Fe3O4 nanocrystal clusters is the same as that described in the first step of Example 1;

[0031] The second step: the double bond functional group on the surface of the ferroferric oxide nanocrystal cluster is the same as that described in the second step of Embodiment 1;

[0032] The third step: the preparation of epoxy functionalized core-shell magnetic polymer microspheres is the same as described in the third step of embodiment 1, the difference is that the consumption of glycidyl acrylate is 2.0 g, and the consumption of divinylbenzene is 500 mg and 50 mg of azobisisoheptanonitrile.

Embodiment 3

[0033] Example 3 Prepare magnetic polymer microspheres with a shell thickness of about 20 nm and a magnetic core particle size of about 200 nm. The specific steps are as follows:

[0034] The first step: preparation of sodium citrate-stabilized Fe3O4 nanocrystal clusters

[0035] Take 4.5 g of ferric chloride hexahydrate (FeCl 3 ·H 2 O), 1.5 g sodium citrate, 10 g sodium acetate (NaAc), dissolved in 100 ml of ethylene glycol, and then transferred to a 150 ml three-necked flask, mechanically stirred at 160 ° C for 6 h, the flask The liquid in the solution was transferred into a 150 ml high-pressure reactor with a polytetrafluoroethylene liner, and then the reactor was placed in an oven at 200 °C for 24 h, and then it was taken out and quickly cooled to room temperature with tap water. Finally, the product was washed by magnetic separation, and unreacted reactants were removed by washing with absolute ethanol and deionized water, respectively, until the supernatant was colo...

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Abstract

The invention discloses a preparation method of an epoxy functional core-shell structure magnetic polymer microsphere. The core of the core-shell structure magnetic polymer microsphere disclosed by the invention is ferroferric oxide nanometer crystal druse; the shell layer of the core-shell structure magnetic polymer microsphere is cross-linked polymer containing epoxy functional group. The preparation method comprises the following three steps of: (1), preparing the ferroferric oxide nanometer crystal druse with a high value of saturated magnetic by adopting a solvothermal method; (2), modifying the surface of the ferroferric oxide nanometer crystal druse into a dual-bond functional group by adopting a sol-gel method; (3), coating the polymer shell layer with the epoxy functional group on the surface of the ferroferric oxide nanometer crystal druse by adopting a distillation-precipitation polymerization method to obtain the epoxy functional core-shell structure magnetic polymer microsphere. The epoxy functional core-shell structure magnetic polymer microsphere is narrowly distributed in grain size, controllable in magnetic content, high in surface epoxy radial reaction activity, easy to modify the functional groups including ammonia group, hydroxyl, group, the mercapto group and the like on the surface, capable of being applied to the industrial waste water treatment field by efficiently adsorbing a plurality of heavy meals or organic pollutants, and good in application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to an epoxy functionalized core-shell magnetic polymer [0002] Preparation method of polymer microspheres. Background technique [0003] In recent years, multifunctional nanomaterials, especially magnetic polymer microspheres, have received extensive attention. Since magnetic polymer microspheres have both the magnetic responsiveness of inorganic magnetic substances and the easy-to-functionalize properties of organic polymer surfaces, they can easily, quickly and efficiently separate or enrich target substances from the medium under an external magnetic field. , protein purification, magnetically targeted drug loading, heavy metal separation and recovery, and wastewater treatment have good application prospects. From the perspective of material application, for rapid separation and efficient enrichment of target substances, ideal magnetic microspheres should have the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F2/06
Inventor 江向平李菊梅熊珊
Owner JINGDEZHEN CERAMIC INSTITUTE
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