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Molecular design of Fe3O4-containing polyimide as a route to nanomagnetic materials / Süleyman Köytepe in Industrial & engineering chemistry research, Vol. 47 n°12 (Juin 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4123–4130 Titre : Molecular design of Fe3O4-containing polyimide as a route to nanomagnetic materials Type de document : texte imprimé Auteurs : Süleyman Köytepe, Auteur ; Turgay Seçkin, Auteur Année de publication : 2008 Article en page(s) : p. 4123–4130 Note générale : Bibliogr. p. 4129-4130 Langues : Anglais (eng) Mots-clés : Fe3O4-containing  polyimide;  Magnetic  properties;  X-ray  diffraction;  Scanning  electron  microscopy Résumé : γ-Fe3O4 doped polyimide films with different weight percentages (1, 5, and 10 wt % of Fe3O4) have been prepared and the effect of nonmagnetic γ-Fe3O4 content on the structural and magnetic properties has been studied. X-ray diffraction (XRD) studies revealed that the nanopowders obtained are magnetite. The calculated grain sizes from XRD data have been verified using scanning electron microscopy (SEM). SEM micrographs show that the powders consist of nanometer-sized grains. Magnetic hysteresis loops were measured at room temperature with a maximum applied magnetic field. As the γ-Fe3O4 content increases, the measured magnetic hysteresis curves become more and more narrow and the saturation magnetization and remanent magnetization both decreased. The prepared nanocomposites were identified in terms of their structure, morphology, and magnetic and thermal properties. These studies showed that the particles seem to be dispersed randomly, although the particles do appear to form aggregates at increasing particle loadings. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701690w [article] Molecular design of Fe3O4-containing polyimide as a route to nanomagnetic materials [texte imprimé] / Süleyman Köytepe, Auteur ; Turgay Seçkin, Auteur . - 2008 . - p. 4123–4130. Bibliogr. p. 4129-4130 Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 n°12 (Juin 2008) . - p. 4123–4130 Mots-clés : Fe3O4-containing  polyimide;  Magnetic  properties;  X-ray  diffraction;  Scanning  electron  microscopy Résumé : γ-Fe3O4 doped polyimide films with different weight percentages (1, 5, and 10 wt % of Fe3O4) have been prepared and the effect of nonmagnetic γ-Fe3O4 content on the structural and magnetic properties has been studied. X-ray diffraction (XRD) studies revealed that the nanopowders obtained are magnetite. The calculated grain sizes from XRD data have been verified using scanning electron microscopy (SEM). SEM micrographs show that the powders consist of nanometer-sized grains. Magnetic hysteresis loops were measured at room temperature with a maximum applied magnetic field. As the γ-Fe3O4 content increases, the measured magnetic hysteresis curves become more and more narrow and the saturation magnetization and remanent magnetization both decreased. The prepared nanocomposites were identified in terms of their structure, morphology, and magnetic and thermal properties. These studies showed that the particles seem to be dispersed randomly, although the particles do appear to form aggregates at increasing particle loadings. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie701690w