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Hollow superparamagnetic PLGA/Fe3O4 composite microspheres for lysozyme adsorption
1National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, People's Republic of China.
Nanotechnology
|February 5, 2014
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.
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.
