Magnetic polymers of maghemite (γ-Fe2O3) and polyvinyl alcohol

被引：41

作者：

Albornoz, C

Sileo, EE

Jacobo, SE

机构：

[1] UBA, Fac Ingn, LAFMACEL, RA-1063 Buenos Aires, Argentina

[2] UBA, Fac Ciencias Exactas & Nat, INQUIMAE, Buenos Aires, Argentina

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 354卷 / 1-4期

关键词：

nanostructures; composites; superparamagnetic particles; PVA; gamma-Fe2O3;

D O I：

10.1016/j.physb.2004.09.038

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Oxide particles synthesized and dispersed in aqueous medium, containing different polymeric forms, can be trapped in solid matrices keeping a high dispersion degree. The oxide/polymer mass ratio determines the average distance between the particles existing in the sol. In this work, ultrafine maghemite particles were prepared in aqueous solution containing different concentrations of polyvinyl alcohol (PVA). The average diameter of the obtained particles was below 20 nm. Adsorption of PVA on the surface of maghemite was examined by infrared spectra and thermogravimetric analysis. The dispersion and agglomeration of the particles were different in an aqueous solution at 4wt% because the magnetite particles were of a small diameter. Magnetic properties of these composites are preserved. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：149 / 153

页数：5

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