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Templated synthesis of mesoporous superparamagnetic polymers

AuthorsFuertes Arias, Antonio Benito ; Sevilla, Marta; Álvarez García, Sonia ; Valdés-Solís, T.; Tartaj, Pedro
Issue Date2007
CitationAdvanced Functional Materials 17 (14): 2321-2327 (2007)
AbstractWe present a novel synthetic strategy for fabricating superparamagnetic nanoparticles randomly dispersed in a mesoporous polymeric matrix. This method is based on the use of mesoporous silica materials as templates. The procedure used to obtain these mesoporous magnetic polymers consisted in: a) generating iron oxide ferrite magnetic nanoparticles (FMNP) of size - 7-8 nm within the pores of the silica, b) loading the porosity of the silica/FMNP composite with a polymer (Polydivinylbenzene), c) selectively removing the silica framework from the resulting silica/FMNP/polymer composite. Such magnetic porous polymeric materials exhibit large surface areas (up to 630 m2g-1), high pore volumes (up to 0.73 cm3 g-1) and a porosity made up of mesopores. In this way, it is possible to obtain superparamagnetic mesoporous hybrid nanocomposites that are easily manipulated by an external magnetic field and display different magnetic behaviours depending on the textural properties of the template employed. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.
Identifiersdoi: 10.1002/adfm.200700073
issn: 1616-301X
Appears in Collections:(ICMM) Artículos
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