PERSONAL DE APOYO
CAPPELLETTI Ariel Leonardo
artículos
Título:
Synthesis and characterization of thermo-sensitive magnetic maghemite nanoparticles
Autor/es:
ARIEL L. CAPPELLETTI; JULIETA I. PAEZ; MIRIAM C. STRUMIA
Revista:
Arkivoc
Editorial:
Arkat Usa, Inc.
Referencias:
Año: 2011 vol. vii p. 426 - 438
ISSN:
1424-6376
Resumen:
The modification of magnetic nanoparticles (MNPs) with a thermo-sensitive organic shell of poly(N-isopropyl acrylamide) (PNIPAm) is reported. The surface of maghemite MNPs was modified in two steps: firstly, using a silane coupling agent and leaving vinyl pending groups on the MNPs surface; and secondly, grafting PNIPAm chains from the modified MNPs via a free radical polymerization. The results found indicate that the methodology here developed for the modification of MNPs is an effective way of synthesizing thermo-responsive MNPs. They present a magnetic behavior due to the maghemite core and a thermal response based on a deswelling/swelling of their polymeric shell (PNIPAm).
