Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
PROCESS FOR OBTAINING FUNCTIONALIZED NANOPARTICULATE MAGNETIC FERRITES FOR EASY DISPERSION
The present invention refer to a innovative process for obtaining nanoparticulate magnetic ferrites, at low temperatures, simple or mixed, functionalized by organic molecules, for dispersion of these nanoparticles in polar or nonpolar media, and the same particles dispersed in a liquid medium, also known as ferrofluids. The present invention enables obtaining both simple ferrites (MFe2O4 or MFe12O19) and mixed ferrites (Nx M(1-x) Fe2O4 or N1-Y Mx+Y Fe(2-x) O4; as example) where M and N can be metals, such as Sm, La, Bi, Ba, Mo, Sr, Ni, Fe, Mn, Cr, etc., through the coprecipitation method, functionalized by organic molecules containing carboxylic groups, which are polymers, or long chain acids or short chain acids, containing mono, di or tricarboxylic groups and/or alcohols, whose dispersion in polar or nonpolar media is improved. The present invention enables also obtaining ferrofluids, through the mixture of the obtained magnetic particles with an appropriate liquid carrier. The substitution of some elements in the ferrites may yield specific mechanical, optical and/or magnetic properties.
PROCESS FOR OBTAINING FUNCTIONALIZED NANOPARTICULATE MAGNETIC FERRITES FOR EASY DISPERSION
The present invention refer to a innovative process for obtaining nanoparticulate magnetic ferrites, at low temperatures, simple or mixed, functionalized by organic molecules, for dispersion of these nanoparticles in polar or nonpolar media, and the same particles dispersed in a liquid medium, also known as ferrofluids. The present invention enables obtaining both simple ferrites (MFe2O4 or MFe12O19) and mixed ferrites (Nx M(1-x) Fe2O4 or N1-Y Mx+Y Fe(2-x) O4; as example) where M and N can be metals, such as Sm, La, Bi, Ba, Mo, Sr, Ni, Fe, Mn, Cr, etc., through the coprecipitation method, functionalized by organic molecules containing carboxylic groups, which are polymers, or long chain acids or short chain acids, containing mono, di or tricarboxylic groups and/or alcohols, whose dispersion in polar or nonpolar media is improved. The present invention enables also obtaining ferrofluids, through the mixture of the obtained magnetic particles with an appropriate liquid carrier. The substitution of some elements in the ferrites may yield specific mechanical, optical and/or magnetic properties.
PROCESS FOR OBTAINING FUNCTIONALIZED NANOPARTICULATE MAGNETIC FERRITES FOR EASY DISPERSION
VERFAHREN ZUR GEWINNUNG FUNKTIONALISIERTER NANOPARTIKULÄRER MAGNETFERRITE FÜR LEICHTE DISPERSION
PROCÉDÉ POUR OBTENIR DES FERRITES MAGNÉTIQUES NANOPARTICULAIRES FONCTIONNALISÉES SE DISPERSANT FACILEMENT
CONTADINI JOSE FERNANDO (Autor:in) / MOHALLEM TARIK DELLA SANTINA (Autor:in) / DE SOUZA TAIANE GUEDES FONSECA (Autor:in)
29.07.2020
Patent
Elektronische Ressource
Englisch
IPC:
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C04B
Kalk
,
LIME
/
H01F
MAGNETS
,
Magnete
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