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Core-shell polygalacturonate magnetic iron oxide nanoparticles: Synthesis, characterization, and functionalities.

Navya Maryjose1, Irma Custovic2, Laroussi Chaabane1

  • 1Université de Bourgogne Franche Comté (UBFC), Institut Agro Dijon, UMR PAM A 02.102, F-21000 Dijon, France.

International Journal of Biological Macromolecules
|August 6, 2022
PubMed
Summary

Magnetic iron oxide nanoparticles coated with polygalacturonic acid (INP-polyGalA) were synthesized. These functionalized nanoparticles show potential for water pollution control and drug delivery applications.

Keywords:
AFM-IRChemical modificationNanoparticlesPolysaccharides

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Development of novel magnetic nanoparticles for environmental and biomedical applications is crucial.
  • Polygalacturonic acid (polyGalA) offers functional groups for surface modification and controlled release.
  • Iron oxide nanoparticles (INPs) provide magnetic properties for targeted applications.

Purpose of the Study:

  • To synthesize polygalacturonate-based magnetic iron oxide nanoparticles (INP-polyGalA).
  • To characterize the synthesized INP-polyGalA for their physical, chemical, and magnetic properties.
  • To explore potential applications in water pollution control and drug delivery.

Main Methods:

  • Synthesis of INP-polyGalA via diffusion of Fe2+ and Fe3+ through polyGalA solution.
  • Characterization using Dynamic Light Scattering (DLS), Transmission Electron Microscopy (TEM), Atomic Force Microscopy (AFM), and X-ray Diffraction (XRD).
  • Analysis of surface charge and functional groups (carboxylate, carboxylic) using IR mapping.

Main Results:

  • Synthesized INP-polyGalA nanoparticles (10-50 nm) with ~45% polyGalA content and negative surface charge (pH 2-7).
  • Confirmed formation of magnetite (Fe3O4) exhibiting magnetic properties.
  • PolyGalA located in the core and on the surface, with accessible carboxylate and carboxylic groups.

Conclusions:

  • INP-polyGalA nanoparticles are successfully synthesized with tunable properties.
  • The functionalized nanoparticles can bind methylene blue for potential water remediation.
  • Hydrogel beads formed via ionotropic gelation enable magnetic-field-triggered release of encapsulated molecules.