Encapsulation of magnetic nanoparticles in a pH-sensitive poly(4-vinyl pyridine) polymer: a step forward to a multi-responsive system

A multiresponsive system that consists on pH-responsive polymer microspheres with encapsulated iron oxide magnetic nanoparticles that rendered the core magnetic to enable externally controlled actuation under magnetic induction has been developed. The inorganic nanoparticles were first prepared and,...

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Bibliographic Details
Published in:Journal of experimental nanoscience 2014-07, Vol.9 (6), p.561-569
Main Authors: Arizaga, Ana, Ibarz, Gemma, Piñol, Rafael, Urtizberea, Ainhoa
Format: Article
Language:English
Subjects:
Encapsulation
Heating
Iron oxides
maghemite
Magnetic fields
Magnetic induction
microencapsulation
Nanoparticles
Nanostructure
pH-responsive
polymer
Pyridines
swelling
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Summary:A multiresponsive system that consists on pH-responsive polymer microspheres with encapsulated iron oxide magnetic nanoparticles that rendered the core magnetic to enable externally controlled actuation under magnetic induction has been developed. The inorganic nanoparticles were first prepared and, then, further encapsulated in a pH-sensitive poly(4-vinylpyridine). These spheres have been obtained by a modification of the simple, rapid and high-reproducible nanoprecipitation method. Magnetic measurements showed that the iron oxide nanoparticles are superparamagnetic and, therefore, able to undergo a local increase of the temperature when an oscillating magnetic field is applied. Magnetically triggered heating and pH sensitivity can be useful for biomedical applications.
ISSN:1745-8080
1745-8099
DOI:10.1080/17458080.2012.678393