A green approach to magnetically-hard electrically-conducting polyaniline/CoFe2O4 nanocomposites (Articolo in rivista)

Type
Label
  • A green approach to magnetically-hard electrically-conducting polyaniline/CoFe2O4 nanocomposites (Articolo in rivista) (literal)
Anno
  • 2015-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.compscitech.2015.02.007 (literal)
Alternative label
  • C. Della Pina, A. M. Ferretti, A. Ponti, E. Falletta (2015)
    A green approach to magnetically-hard electrically-conducting polyaniline/CoFe2O4 nanocomposites
    in Composites science and technology
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • C. Della Pina, A. M. Ferretti, A. Ponti, E. Falletta (literal)
Pagina inizio
  • 138 (literal)
Pagina fine
  • 144 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 110 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dipartimento di Chimica, Università degli Studi di Milano, e ISTM-CNR, Via C. Golgi, 19, 20133 Milano, Italy Laboratorio di Nanotecnologie, Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, Via G. Fantoli, 16/15, 20138 Milano, Italy Laboratorio di Nanotecnologie, Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, Via G. Fantoli, 16/15, 20138 Milano, Italy Dipartimento di Chimica, Università degli Studi di Milano, e ISTM-CNR, Via C. Golgi, 19, 20133 Milano, Italy (literal)
Titolo
  • A green approach to magnetically-hard electrically-conducting polyaniline/CoFe2O4 nanocomposites (literal)
Abstract
  • Magnetically-hard, electrically-conducting polyaniline/CoFe2O4 nanocomposites were prepared by oxidative polymerization of N-(4-aminophenyl)aniline using molecular oxygen or hydrogen peroxide as the oxidants and magnetic CoFe2O4 nanoparticles, both uncoated and oleic acid-coated, with the double role of polymerization catalyst and magnetic filler. Oleic acid-coated nanoparticles showed higher catalytic activity than uncoated ones, especially under aerobic conditions. The size of the nanoparticles did not undergo significant changes during the polymerization process. The nanocomposites are magnetically hard with large remanence/saturation ratio, very large coercivity (8-15 kOe at 5 K) and do not display superparamagnetic effects even at RT. The addition of Fe3+ as a further oxidant allowed to tune the electroconductive properties of the materials, with conductivity ranging from 7.3 . 10^-5 S/cm to 5.5 . 10^-3 S/cm. (literal)
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