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Templated Synthesis of Mesoporous Superparamagnetic Polymers
Author(s) -
Fuertes A. B.,
Sevilla M.,
Álvarez S.,
ValdésSolís T.,
Tartaj P.
Publication year - 2007
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200700073
Subject(s) - materials science , superparamagnetism , mesoporous material , mesoporous silica , polymer , porosity , nanoparticle , nanocomposite , composite number , chemical engineering , magnetic nanoparticles , template , nanotechnology , mesoporous organosilica , iron oxide , composite material , magnetization , magnetic field , organic chemistry , catalysis , chemistry , physics , quantum mechanics , engineering , metallurgy
We 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 m 2 g –1 ), high pore volumes (up to 0.73 cm 3 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.