Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/43284
標題: Conducting and magnetic behaviors of monodispersed iron oxide/polypyrrole nanocomposites synthesized by in situ chemical oxidative polymerization
作者: Wu, T.M.
吳宗明
Yen, S.J.
Chen, E.C.
Sung, T.W.
Chiang, R.K.
關鍵字: conductivity
iron oxide
morphology
nanocomposite
nanoparticles
polypyrroles
structure
carbon nanotube composites
electrical-properties
miniemulsion
polymerization
colloidal dispersions
polypyrrole
nanoparticles
particles
nanocables
sensor
期刊/報告no:: Journal of Polymer Science Part a-Polymer Chemistry, Volume 45, Issue 20, Page(s) 4647-4655.
摘要: This study describes the preparation of nanocomposites fabricated from monodispersed iron oxide (Fe(3)O(4)) and polypyrrole (PPy) by in situ chemical oxidative polymerization. The monodispersed 4 nm Fe(3)O(4) nanoparticles which served as cores were synthesized using the thermal decomposition of a mixture of Iron (III) acetylacetonate and oleic acid in the presence of high boiling point solvents. The resulting nanoparticles were further dispersed in an aqueous solution with anionic surfactant sodium bis(2-ethylhexyl) sulfosuccinate to form micelle/Fe(3)O(4) spherical templates that avoid the aggregation of Fe(3)O(4) nanoparticles during the further preparation of the nanocomposites. The Fe(3)O(4)/PPy nanocomposites were then synthesized via in situ chemical oxidative polymerization on the surface of the spherical templates. Both field-emission scanning electron microscopy (FESEM) and high-resolution transmission electron microscopy (HRTEM) images indicate that the resulting Fe(3)O(4) nanoparticles are close to spherical dots with a particle size of about 4 nm and a standard deviation of less than 5% (4 +/- 0.2 nm). Structural and morphological analysis using FESEM and HRTEM showed that the fabricated Fe(3)O(4)/PPy nanocomposites are core (Fe(3)O(4))-shell (PPy) structures. Morphology of the nanocomposites shows a remarkable change from spherical to tube-like structures as the content of monodispersed Fe(3)O(4) nanoparticles increases from 9% up to 24 wt %. The conductivities of these Fe(3)O(4)/PPy nanocomposites are about six times higher than those of PPy without Fe(3)O(4). (c) 2007 Wiley Periodicals, Inc.
URI: http://hdl.handle.net/11455/43284
ISSN: 0887-624X
文章連結: http://dx.doi.org/10.1002/pola.22211
Appears in Collections:材料科學與工程學系

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