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Poly(vinylpyrrolidone)/tetrabutyl titanate (PVP/ [CH3(CH2)3O]4Ti) composite nanofibres are prepared by elec- trospinning. After calcining parts of composite nanofibres in air at 700 C, petal-like TiO2 nanostructures are obtained. The characterizations of composite nanofibres and TiO2 nanostructures are carried out by a scanning electron micro- scope, an x-ray diffractometer, and an infrared spectrometer. Electrospun nanofibres are pressed into pellets under different pressures in order to explore their dielectric properties. It is found that the dielectric constants decrease with frequency increasing. The dielectric constant of the composite nanofibre pellet increases whereas its dielectric loss tangent decreases due to the doped titanium ions compared with those of pure PVP nanofibre pellets. In addition, it is observed that the dielectric constant of the composite nanofibre pellet decreases with the increase of the pressure applied in pelletization.
Polyvinylpyrrolidone / tetrabutyl titanate (PVP / [CH3 (CH2) 3O] 4Ti) composite nanofibers are prepared by elec- trospinning. After calcining parts of composite nanofibers in air at 700 C, petal-like TiO2 nanostructures are obtained. The characterizations of composite nanofibers and TiO2 nanostructures are carried out by a scanning electron micro-scope, an x-ray diffractometer, and an infrared spectrometer. It is found that the dielectric constants decrease with frequency increasing. The dielectric constant of the composite nanofibre pellet increases and its dielectric loss tangent increases due to the doped titanium ions compared with those of pure PVP nanofibre pellets. In addition, it is observed that the dielectric constant of the composite nanofibre pellet decreases with the increase of the pressure applied in pelletization.