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Hollow superparamagnetic PLGA/Fe3O4 composite microspheres for lysozyme adsorption.

Qi Yang1, Yao Wu, Fang Lan

  • 1National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, People's Republic of China.

Nanotechnology
|February 5, 2014
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Summary

Uniform hollow superparamagnetic microspheres were synthesized using poly(lactic-co-glycolic acid) (PLGA) and Fe(3)O(4) nanoparticles. These magnetic microspheres demonstrate high efficiency for lysozyme adsorption.

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Nanotechnology

Background:

  • Poly(lactic-co-glycolic acid) (PLGA) is a biodegradable polymer widely used in drug delivery.
  • Iron(III) oxide (Fe(3)O(4)) nanoparticles offer unique magnetic properties.
  • Composite materials combining polymers and magnetic nanoparticles can lead to novel applications.

Purpose of the Study:

  • To synthesize uniform hollow superparamagnetic PLGA/Fe(3)O(4) composite microspheres.
  • To characterize the microspheres' properties, including size, monodispersity, magnetic responsiveness, and magnetite content.
  • To evaluate the efficiency of these microspheres for lysozyme adsorption.

Main Methods:

  • Modified oil-in-water (O/W) emulsion-solvent evaporation method.
  • Utilized Fe(3)O(4) nanoparticles as a particulate emulsifier.
  • Characterization techniques to assess microsphere properties and adsorption efficiency.

Main Results:

  • Synthesized uniform hollow microspheres with an average diameter of 2.5 μm.
  • Achieved excellent monodispersity and stability in aqueous medium.
  • Demonstrated strong magnetic responsiveness, high magnetite content (>68%), high saturation magnetization (58 emu g(-1)), and high lysozyme adsorption efficiency.

Conclusions:

  • Successfully developed novel hollow superparamagnetic PLGA/Fe(3)O(4) composite microspheres.
  • The synthesized microspheres possess desirable properties for potential applications in adsorption and separation.
  • The high efficiency in lysozyme adsorption highlights their potential in biomolecule purification.