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Method for preparing high-dispersibility polystyrene magnetic microsphere

A technology of magnetic microspheres and polystyrene, which is applied in the field of preparation of highly dispersed polystyrene magnetic microspheres, and can solve the problems of poor crystallinity, low dispersion and weak magnetic response of magnetic polymer microsphere nanoparticles , to achieve good magnetic response properties, uniform particle size distribution, and high dispersion

Inactive Publication Date: 2017-03-08
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Document 1 (Yang Xu, Li Xin, Pan Fusheng, etc. Preparation and Characterization of Magnetic Polymer Microspheres Containing Carboxyl Groups on the Surface[J]. Chemical World, 2006(5):276-280.) and Document 2 (Jin Yanqiao, Li Xi, Zhang Chaocan. Preparation of polystyrene magnetic microspheres by microsuspension polymerization[J]. Polymer Materials Science and Engineering, 2006,22(6):87-89.) Magnetic polymer microspheres prepared by etc. Nanoparticles have poor crystallinity, weak magnetic response, large particle size distribution, and low dispersion, which limits their use

Method used

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  • Method for preparing high-dispersibility polystyrene magnetic microsphere
  • Method for preparing high-dispersibility polystyrene magnetic microsphere
  • Method for preparing high-dispersibility polystyrene magnetic microsphere

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: polystyrene wraps magnetic Fe 3 o 4 preparation of

[0022] Dissolve 2.74g of carbon disulfide, 10.75g of chloroform, 5.23g of acetone and 0.241g of tetrabutylammonium bisulfate in 12mL of toluene, and slowly add 20.16g of 50% sodium hydroxide (10-15min) under stirring in an ice-water bath in a nitrogen atmosphere, After the sodium hydroxide was added dropwise, react for 12 hours to obtain a yellow solid, add 90mL deionized water to dissolve it, let stand to separate and take the water phase, add 12mL concentrated hydrochloric acid under nitrogen protection, stir and react for 30min, obtain a yellow precipitate, wash, filter, Dry to constant weight to get S, S'-di(ɑ,ɑ'-dimethyl-ɑ"-acetic acid) trithiocarbonate (CTA). The reaction principle is as follows figure 1 shown.

[0023] 10.8g FeCl 3 ·6H 2 O, 3.9 g FeCl 2 4H 2 O was dissolved in 200mL of deionized water, 3.5g of oleic acid (OA) was weighed and dissolved in 120mL of acetone, and then the two p...

Embodiment 2

[0027] Embodiment 2: polystyrene encapsulation magnetic Fe 3 o 4 preparation of

[0028] 8.00g styrene, 0.40g hexadecane, 0.64g OA wrapped Fe 3 o 4 , 0.08g CTA, and 0.12g azobisisobutylamidine hydrochloride were added into a three-necked flask and ultrasonicated for 5 minutes to make an oil phase; 0.16g ILs was dissolved in 48.0g deionized water to make an aqueous phase; then the two phases Mix and react under vigorous stirring (600 rpm) under nitrogen atmosphere for 1 h. Then sonicate in an ice-water bath for 60 minutes, and then stir (400rpm) at 70°C for 20 hours. After the reaction is completed, cool to room temperature to obtain khaki microspheres, which are washed with deionized water to obtain polystyrene-coated magnetic Fe. 3 o 4 Microspheres.

[0029] The magnetic properties and stability of the microspheres were determined by using a magnetic field. Depend on Figure 4 b and Figure 5 It can be seen that the latex has high magnetic response, good stability, c...

Embodiment 3

[0030] Embodiment 3: polystyrene encapsulation magnetic Fe 3 o 4 preparation of

[0031] 8.00g styrene, 0.40g hexadecane, 0.64g OA wrapped Fe 3 o 4 , 0.08g CTA, 0.016g azobisisobutylimidazoline hydrochloride were added into a three-necked flask and ultrasonically 10min to make an oil phase; 0.16g ILs was dissolved in 64.0g deionized water to make an aqueous phase; then the two They were mixed together and reacted for 1 h under vigorous stirring (600 rpm) under a nitrogen atmosphere. Then sonicate in an ice-water bath for 60 minutes, and then stir (400rpm) at 70°C for 20 hours. After the reaction is completed, cool to room temperature to obtain khaki microspheres, which are washed with deionized water to obtain polystyrene-coated magnetic Fe. 3 o 4 Microspheres.

[0032] The magnetic properties and stability of the microspheres were determined by using a magnetic field. Depend on Figure 4 c and Figure 5 It can be seen that the latex has high magnetic response, good s...

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Abstract

The invention discloses a method for preparing high-dispersibility polystyrene magnetic microsphere. The method takes Fe3O4 nanoparticles as a magnetic carrier and takes styrene as a raw material, S,S'-bi(alpha, alpha'-dimethyl-alpha''-acetic acid) trithiocarbonate is a reversible addition-fracture chain transferring agent, and the polystyrene-Fe3O4 magnetic microsphere is prepared by a reversible addition-fracture chain transfer free radical microemulsion polymerization method. Through analysis on the form, particle size, magnetism and stability of the magnetic microsphere, the prepared polystyrene-Fe3O4 magnetic microsphere takes Fe3O4 as a core and PS as a shell, the polystyrene-Fe3O4 magnetic microsphere is the coated nanoparticles with the core and the shell connected by a covalent bond, the average diameter is about 200 nm, the polystyrene-Fe3O4 magnetic microsphere has good magnetism, stability and high dispersibility, and can be dispersed in an aqueous solution in a stable mode for long-term.

Description

technical field [0001] The invention relates to the field of synthesis of inorganic nano and high molecular polymers, in particular to a preparation method of highly dispersed polystyrene magnetic microspheres. [0002] technical background [0003] Magnetic polystyrene microspheres belong to magnetic polymer microspheres. They are a new type of composite material that combines inorganic magnetic particles with polymer materials. The many properties make it more widely used in composite materials, medicine, environmental protection, fine chemicals and other fields. Among them, magnetic polymer materials, especially inorganic iron oxide materials, are used in magnetic memory materials, biosensors, cell and protein separation markers, and pharmaceuticals. Carriers, magnetic resonance imaging and other aspects have been widely used, and have received great attention from scientists at home and abroad. [0004] Document 1 (Yang Xu, Li Xin, Pan Fusheng, etc. Preparation and Chara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F112/08C08J3/12C08F2/44C08K9/04C08K3/22
Inventor 熊琰董伟潘夕郝
Owner NANJING UNIV OF SCI & TECH
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