摘要:
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.
摘要翻译:本发明涉及用于在低温下简单或混合获得由有机分子官能化的纳米颗粒磁性铁氧体,用于在极性或非极性介质中分散这些纳米颗粒的分散在液体介质中的同样的颗粒的创新方法,也已知 作为铁磁流体。 本发明能够获得简单铁氧体(MFe2O4或MFe12O19)和混合铁氧体(Nx M(1-x)Fe 2 O 4或N 1 -Y M x + Y Fe(2-x)O 4)作为实例),其中M和N可以是金属 通过共聚沉淀法制得的Sm,La,Bi,Ba,Mo,Sr,Ni,Fe,Mn,Cr等,由聚合物或长链酸或短链的含有羧基的有机分子官能化 酸,其包含单极,二或三羧酸基团和/或醇,其在极性或非极性介质中的分散性得到改善。 本发明还可以通过所获得的磁性颗粒与合适的液体载体的混合物获得铁磁流体。 铁氧体中一些元素的取代可以产生特定的机械,光学和/或磁性。
摘要:
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.
摘要翻译:本发明涉及用于在低温下简单或混合获得由有机分子官能化的纳米颗粒磁性铁氧体,用于在极性或非极性介质中分散这些纳米颗粒的分散在液体介质中的同样的颗粒的创新方法,也已知 作为铁磁流体。 本发明能够获得简单铁氧体(MFe2O4或MFe12O19)和混合铁氧体(Nx M(1-x)Fe 2 O 4或N 1 -Y M x + Y Fe(2-x)O 4)作为实例),其中M和N可以是金属 通过共聚沉淀法制得的Sm,La,Bi,Ba,Mo,Sr,Ni,Fe,Mn,Cr等,由聚合物或长链酸或短链的含有羧基的有机分子官能化 酸,其包含单极,二或三羧酸基团和/或醇,其在极性或非极性介质中的分散性得到改善。 本发明还可以通过所获得的磁性颗粒与合适的液体载体的混合物获得铁磁流体。 铁氧体中一些元素的取代可以产生特定的机械,光学和/或磁性。