Synthesis and Characterization of Magnetic Composites Based on Cis-Polyisoprene and CoFe(2)O(4) Nanoparticles
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2009
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Resumo |
CoFe(2)O(4) nanoparticles were obtained by the co-precipitation method. They were further modified by the adsorption of ricinoleic acid (RA). The non-modified and modified CoFe(2)O(4)/RA nanoparticles were characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman, and Fourier transform infrared (FTIR) spectroscopy. The modified particles present a mean diameter < 20 nm. The adsorption of RA on the CoFe(2)O(4) surface is characterized by the IR absorptions of the RA while in the Raman spectrum the predominant signals are those from the CoFe(2)O(4). The cis-polyisoprene (PI) composite was prepared by dissolving PI in cyclohexane followed by the addition of a magnetic fluid based on CoFe(2)O(4)/RA nanoparticles dispersed in cyclohexane. After solvent evaporation a magnetic composite was obtained and characterized by AFM, Raman, and FTIR measurements. AFM images show uniformly CoFe(2)O(4)/RA particles distributed in the PI matrix. Raman spectra obtained for the composites reveal the characteristic Raman peaks of PI and CoFe(2)O(4) nanoparticles. CNPq Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) FAPESP Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) CAPES Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) |
Identificador |
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.9, n.6, p.3617-3621, 2009 1533-4880 http://producao.usp.br/handle/BDPI/31184 10.1166/jnn.2009.NS39 |
Idioma(s) |
eng |
Publicador |
AMER SCIENTIFIC PUBLISHERS |
Relação |
Journal of Nanoscience and Nanotechnology |
Direitos |
closedAccess Copyright AMER SCIENTIFIC PUBLISHERS |
Palavras-Chave | #Cobalt Ferrite #Polyisoprene #Magnetic Fluid #Raman #AFM #COBALT-FERRITE #RAMAN-SPECTROSCOPY #POLYVINYL-ALCOHOL #PARTICLES #SIZE #PERMITTIVITY #TEMPERATURE #STABILITY #CRYSTALS #Chemistry, Multidisciplinary #Nanoscience & Nanotechnology #Materials Science, Multidisciplinary #Physics, Applied #Physics, Condensed Matter |
Tipo |
article original article publishedVersion |