Dielectric properties of electrospun titanium compound/polymercomposite nanofibres

• Published in: Chinese physics B no. 2; pp. 498 - 503
• Main Author: 李蒙蒙 龙云泽 谭金山 尹红星 隋万美 张志明
• Format: Journal Article
• Language: English
• Published: 2010
• Subjects: X射线衍射仪; 乙烯基吡咯烷酮; 复合介质; 复合纳米纤维; 纤维颗粒; 聚乙烯吡咯烷酮; 钛酸四丁酯; 静电性能
• ISSN: 1674-1056; 2058-3834

Poly（vinylpyrrolidone）/tetrabutyl titanate （PVP/ [CH3（CH2）3O]4Ti） composite nanofibres are prepared by electrospinning. After calcining parts of composite nanofibres in air at 700 ~℃, petal-like TiO2 nanostructures are obtained. The characterizations of composite nanofibres and TiO2 nanostructures are carried out by a scanning electron microscope, 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.