Akaganeite polymer nanocomposites

An “in situ” method for the production of akaganeite polymer nanocomposites is described. A controlled precipitation is achieved by using a polymer matrix, polyvinylpyridine, containing N-base functional groups that form coordination bonds with iron ions. The resulting materials have permitted the o...

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Bibliographic Details
Published in:Polymer (Guilford) 2009-02, Vol.50 (5), p.1088-1094
Main Authors: Millan, A., Urtizberea, A., Natividad, E., Luis, F., Silva, N.J.O., Palacio, F., Mayoral, I., Ruiz-González, M.L., González-Calbet, J.M., Lecante, P., Serin, V.
Format: Article
Language:English
Subjects:
Akaganeite
Applied sciences
Composites
Exact sciences and technology
Forms of application and semi-finished materials
Magnetic nanoparticles
Polymer industry, paints, wood
Polymer nanocomposite
Technology of polymers
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Summary:An “in situ” method for the production of akaganeite polymer nanocomposites is described. A controlled precipitation is achieved by using a polymer matrix, polyvinylpyridine, containing N-base functional groups that form coordination bonds with iron ions. The resulting materials have permitted the observation of two sources of magnetic moment in akaganeite nanoparticles: (1) finite size effects with a characteristic blocking temperature below 2K; and (2) a deficient Cl− occupancy, with a characteristic blocking temperature around 18K. Moreover, the nanocomposites can be dissolved in slightly acidic media to obtain stable aqueous nanoparticle dispersions that could be useful in biomedical applications. [Display omitted]
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2009.01.034