Cobalt Ferrite Nanoparticles as Multifunctional Cross-Linkers in PAAm Ferrohydrogels
2011; American Chemical Society; Volume: 44; Issue: 8 Linguagem: Inglês
10.1021/ma102708b
ISSN1520-5835
AutoresRenate Messing, Natalia Frickel, L. Belkoura, R. Strey, Helene Rahn, Stefan Odenbach, Annette M. Schmidt,
Tópico(s)Advanced Sensor and Energy Harvesting Materials
ResumoFerrohydrogels are synthesized by incorporation of magnetic CoFe2O4 nanoparticles into a polyacylamide hydrogel network during the polymerization process by utilizing different cross-linking units. Conventional cross-linked ferrohydrogels, using a molecular cross-linker, are compared to those obtained by our new approach where the magnetic particles, surface-functionalized with methacylic groups, serve as sole, multifunctional cross-linkers. Both experimental series are analyzed with regard to their swelling behavior. The novel composite network is examined with respect to the cross-linkage, the network homogeneity, and the network architecture by various experimental techniques.
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