Dielectric properties of electrospun titanium compound/polymer composite nanofibres  

作　　者：李蒙蒙 龙云泽 谭金山 尹红星 隋万美 张志明 

机构地区：[1]College of Physics Science,Qingdao University [2]Laboratory of Fibre Materials and Modern Textile,the Growing Base for State Key Laboratory,Qingdao University [3]College of Chemistry and Chemical Engineering,Ocean University of China

出　　处：《Chinese Physics B》2010年第2期498-503,共6页中国物理B（英文版）

基　　金：supported by the Program for New Century Excellent Talents in University of China (Grant No. NCET-07-0472);the National Natural Science Foundation of China (Grant No. 10604038)

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.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.

关 键 词：composite nanofibres ELECTROSPINNING dielectric properties 

分 类 号：TB383.1[一般工业技术—材料科学与工程]