Abstract
Abstract Core-shell magnetic polymer particles were synthesized by seeded suspension polymerization. The core was made of poly(methyl methacrylate-co-divinylbenzene) and a mixture of magnetite, maghemite and goethite (P(MMA-co-DVB)-M). The shell was composed of poly(glycidyl methacrylate-co-divinylbenzene) (P(GMA-co-DVB)). These particles were characterized by infrared spectrometry (FTIR), thermal analysis (TG), scanning electron microscopy (SEM), dynamic light scattering (DLS) and vibrating sample magnetometry (VSM). The results showed the formation of core-shells with good magnetic properties (≈7.1 emu/g) and good thermal resistance (≈300 oC). The light scattering experiments showed that the particle size of these materials changed from 5-90 microns (core) to 5-120 microns (core-shell). Scanning electron microscopic images were useful to show the formation of P(GMA-co-DVB) shells on P(MMA- co-DVB)-M cores. The materials synthesized in this work have potential to be modified and employed in magnetic separation processes in the biotech and environmental fields.
Highlights
Core-shell magnetic polymer particles are typically polymer supports using styrene, methyl methacrylate, and prepared by a series of emulsion, dispersion or suspension cardanol as monomers
The organic phase (OP) was added to the aqueous phase and the suspension polymerization was conducted at 80 °C for 4 h
It is possible to visualize small agglomerated spherical particles inside the larger microsphere (Figure 1a). These morphological differences between the external surface and interior of microspheres are common features of crosslinked macroporous polymers synthesized by suspension polymerization
Summary
Core-shell magnetic polymer particles are typically polymer supports using styrene, methyl methacrylate, and prepared by a series of emulsion, dispersion or suspension cardanol as monomers. Both core and shell domains can be composed polymer particles presented the characteristic core–shell of varied materials, including polymers, inorganic solids, particle structure, with specific areas and average pore and metals[1]. The core-shell model is becoming the most sizes. They showed that the particles could be used efficient way to use magnetic polymer particles as carriers successfully for immobilization of CALB, leading to and separators in the technological field. The magnetic immobilization efficiencies and enzyme activities better nanoparticles can be shifted to the polymer core so they than the ones obtained with Accurel MP 1000 (commercial remain protected from the weather (e.g., oxidation) and support for the immobilization of enzymes)
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