期刊
SYNTHETIC METALS
卷 126, 期 2-3, 页码 179-182出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0379-6779(01)00505-7
关键词
polypyrrole; titanium dioxide; zinc phosphate; composite films; XPS
TiO2 as well as a commercial zinc phosphate pigment were incorporated to the PPy matrix during its electropolymerisation on mild steel. Their distribution in the composite films (PPy/TiO2 and PPy/zinc phosphate) was examined by X-ray photoelectron spectroscopy(XPS) and scanning electron microscopy (SEM). Chemical and electrochemical factors had different influences on their distribution within the PPy matrix. XPS analysis showed that TiO2 is found throughout the PPy films and it is uniformly distributed onto the surface, conversely to zinc phosphate. The latter is present in two heterogeneously distributed forms; (1) a conductive soluble minority and (2) a non-conductive nonsoluble majority. The minority form is probably inserted from the soluble species in a complexed form and plays a counter-ion role. (C) 2002 Elsevier Science B.V. All rights reserved.
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