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Dielectric properties of electrospun titanium compound/polymer composite nanofibres |
| Li Meng-Meng(李蒙蒙)a), Long Yun-Ze(龙云泽) a)†, Tan Jin-Shan(谭金山)b), Yin Hong-Xing(尹红星)a), Sui Wan-Mei(隋万美) a), and Zhang Zhi-Ming(张志明)c) |
| a College of Physics Science, Qingdao University, Qingdao 266071, China; b Laboratory of Fibre Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China; c College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China |
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Abstract 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.
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Received: 05 May 2009
Revised: 07 July 2009
Accepted manuscript online:
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PACS:
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77.22.Ch
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(Permittivity (dielectric function))
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81.16.-c
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(Methods of micro- and nanofabrication and processing)
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68.37.Hk
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(Scanning electron microscopy (SEM) (including EBIC))
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61.05.cp
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(X-ray diffraction)
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78.30.-j
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(Infrared and Raman spectra)
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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| Fund: Project supported by the Program
for New Century Excellent Talents in University of China (Grant
No.~NCET-07-0472) and the National Natural Science Foundation of
China (Grant No.~10604038). |
Cite this article:
Li Meng-Meng(李蒙蒙), Long Yun-Ze(龙云泽), Tan Jin-Shan(谭金山), Yin Hong-Xing(尹红星), Sui Wan-Mei(隋万美), and Zhang Zhi-Ming(张志明) Dielectric properties of electrospun titanium compound/polymer composite nanofibres 2010 Chin. Phys. B 19 028102
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