Polystyrene coating of Fe3O4 particles using dispersion polymerization

Guo, L.; Guang-ling, Pei; Wang, Ting-Jie; Wang, Zhanwen; Ye, Jin

doi:10.1016/j.colsurfa.2006.07.008

Cited by 26 publications

(15 citation statements)

References 11 publications

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“…Fe 3 O 4 NFs are naturally hydrophilic due to plentiful hydroxyls on the particle surface. 26 The hydroxyl group in PVA can form hydrogen bonds with the hydroxyl group on Fe 3 O 4 NFs, which enables Fe 3 O 4 NFs to be well dispersed. Because of the weak static interactions between the -SO 3 group in p-TSA molecules and Fe 3 O 4 NFs, p-TSA molecules can be adsorbed on the surface of Fe 3 O 4 NFs.…”

Section: Formation Mechanismmentioning

confidence: 99%

Superparamagnetic functional C@Fe3O4 nanoflowers: development and application in acetaminophen delivery

Zhang

Teng³

et al. 2013

J. Mater. Chem. B

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Fe 3 O 4 nanoflowers (NFs) were synthesized via an aqueous solution method and coated with carbon through an in situ carbonization process. The synthesized C@Fe 3 O 4 composites were further modified with strong oxidizing agents, forming functional C@Fe 3 O 4 (FCF) flower-like composites with porous superstructure. Finally, the stable composites were used in the drug delivery test under ambient conditions; the amount of acetaminophen adsorption on the composite can weigh up to 25.07% in 3 h.The FCF composites show excellent porosity (165.23 m 2 g À1 ) and magnetic properties (24.33 emu g À1 ).The -COOH, C]O and -OH groups in the composites could be used for interaction with biomolecules that contain -OH, C]O and -NH 2 groups. Therefore, the composite exhibits a sustained release model, with release rates of 51% in the first 6 h and 73% in 12 h. This special character gives the composites potential to be used in magnetic bio-separation and drug/gene delivery. The findings in this study are useful for the engineering design of porous iron oxide coated with functional carbon that is used for medical delivery applications and other biomedical devices.

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Section: Formation Mechanismmentioning

confidence: 99%

Superparamagnetic functional C@Fe3O4 nanoflowers: development and application in acetaminophen delivery

Zhang

Teng³

et al. 2013

J. Mater. Chem. B

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show abstract

“…The polymerization is initiated in a homogeneous solution, but depending on the solvency of the medium for the resulting macromolecules, phase separation occurs 32. Most often a stabilizer is added [e.g., polyvinylpyrrolidone,27 poly(acrylic acid)],26,33 which can have the disadvantage to form very stable dispersions that cannot be filtered. Instead we avoided the use of a dispersion stabilizer to form agglomerates that are easily filtered out.…”

Section: Resultsmentioning

confidence: 99%

“…Such disadvantages can be overcome through dispersion polymerization that does not use emulsifiers 23–26. A continuous and dense polymer layer coating was demonstrated in the case of polystyrene coating of Fe 3 O 4 particles using dispersion polymerization 27. A novel phase inversion technique using DMSO as solvent was applied to produce homogeneous Al 2 O 3 /PA composites, however with modest green and sintered densities of the parts 6…”

Section: Introductionmentioning

confidence: 99%

Polystyrene‐coated alumina powder via dispersion polymerization for indirect selective laser sintering applications

Cardon¹,

Deckers²,

Verberckmoes³

et al. 2012

J of Applied Polymer Sci

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A promising method for the manufacture of complex 3D ceramic parts is selective laser sintering (SLS). SLS of alumina components can be done either directly or indirectly. In this article, the indirect method is used by using polystyrene coated alumina particles. One of the methods to produce these alumina powders is dispersion polymerization. In this research, it is described how the alumina powder has been developed and tested. The powder has been characterized to define its processability within the SLS process. Used techniques include SEM (morphology), STA/TGA (overall mass loss), DSC (glass transition temperature T g ), and laser diffraction (particle size distribution). The investigated SLS process parameters were the preheating temperature, laser power, scan spacing, and scan speed. STA/TGA has proven that polystyrene-coated alumina powders are suitable for SLS process, while DSC results were judged to be a good source of complementary data on preheating temperature of alumina/polystyrene powders. SLS experiments showed that single layer green parts can be produced. By using the optimized SLS parameters, it was demonstrated that different 3D geometries can be produced with the polystyrene coated alumina powders.

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“…doi:10.1016/j.bios.2010.11.047 relates to the realization of the steric stabilization that may increase the nano-particle stability in the biological environment for the application to biosensing. In this context, Fe 3 O 4 nanoparticles have been found to play distinct roles in chemical, medical and industrial fields (Gong et al, 2007) because of their interesting magnetic properties, biocompatibility, and potential applications in the field of clinical diagnostics (Guo et al, 2007) and sensors (Katz et al, 2005). However, their tendency to aggregate limits their biosensing applications.…”

Section: Introductionmentioning

confidence: 99%

Chitosan–iron oxide nano-composite platform for mismatch-discriminating DNA hybridization for Neisseria gonorrhoeae detection causing sexually transmitted disease

Singh

Verma

Sumana

et al. 2011

Biosensors and Bioelectronics

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Polystyrene coating of Fe3O4 particles using dispersion polymerization

Cited by 26 publications

References 11 publications

Superparamagnetic functional C@Fe3O4 nanoflowers: development and application in acetaminophen delivery

Superparamagnetic functional C@Fe3O4 nanoflowers: development and application in acetaminophen delivery

Polystyrene‐coated alumina powder via dispersion polymerization for indirect selective laser sintering applications

Chitosan–iron oxide nano-composite platform for mismatch-discriminating DNA hybridization for Neisseria gonorrhoeae detection causing sexually transmitted disease

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