Title of article
Polypyrrole/γ-Fe2O3 magnetic nanocomposites synthesized in supercritical fluid
Author/Authors
Haldorai Yuvaraj، نويسنده , , Min Hee Woo، نويسنده , , Eun Ju Park، نويسنده , , Yeon Tae Jeong، نويسنده , , Kwon Taek Lim، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
8
From page
637
To page
644
Abstract
Polypyrrole/iron oxide (PPy/γ-Fe2O3) nanocomposites were synthesized by in situ oxidative polymerization of pyrrole in the presence of surface modified γ-Fe2O3 in supercritical carbon dioxide (scCO2). The structural properties of nanocomposite particles thus obtained were characterized by FT-IR, thermal analysis (TGA), X-ray diffraction (XRD), and transmission electron microscopy (TEM). It was found that ca. 50 nm γ-Fe2O3 nanoparticles were well dispersed in PPy powder in TEM pictures. X-ray photoelectron spectroscopy (XPS) analysis also support that all γ-Fe2O3 nanoparticles are encapsulated by PPy. Magnetic property of the nanocomposites was measured by SQUID, which indicated that the nanocomposites are superparamagnetic. The effects of different loadings of γ-Fe2O3 on the polymerization were also investigated.
Keywords
Supercritical carbon dioxide , nanocomposites , magnetic materials , Polypyrrole , ?-Fe2O3
Journal title
European Polymer Journal(EPJ)
Serial Year
2008
Journal title
European Polymer Journal(EPJ)
Record number
1227551
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