中国物理B ›› 2010, Vol. 19 ›› Issue (2): 28102-028102.doi: 10.1088/1674-1056/19/2/028102

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Dielectric properties of electrospun titanium compound/polymer composite nanofibres

张志明1, 李蒙蒙2, 龙云泽2, 尹红星2, 隋万美2, 谭金山3   

  1. (1)College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China; (2)College of Physics Science, Qingdao University, Qingdao 266071, China; (3)Laboratory of Fibre Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China
  • 收稿日期:2009-05-05 修回日期:2009-07-07 出版日期:2010-02-15 发布日期:2010-02-15
  • 基金资助:
    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).

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)   

  1. 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
  • Received:2009-05-05 Revised:2009-07-07 Online:2010-02-15 Published:2010-02-15
  • Supported by:
    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).

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摘要： 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.

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.

Key words: composite nanofibres, electrospinning, dielectric properties

中图分类号:  (Permittivity (dielectric function))

  • 77.22.Ch
81.16.-c (Methods of micro- and nanofabrication and processing) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC)) 61.05.cp (X-ray diffraction) 78.30.-j (Infrared and Raman spectra) 78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)