High Dielectric Constant Study of TiO2-Polypyrrole Composites with Low Contents of Filler Prepared by In Situ Polymerization

被引：11
|
作者：
Ahmed, Khalil [1 ]
Kanwal, Farah [1 ]
Ramay, Shahid M. [2 ]
Mahmood, Asif [3 ]
Atiq, Shahid [4 ]
Al-Zaghayer, Yousef S. [3 ,5 ]
机构：
[1] Univ Punjab, Inst Chem, New Campus, Lahore 54590, Pakistan
[2] King Saud Univ, Dept Phys & Astron, Coll Sci, Riyadh 11421, Saudi Arabia
[3] King Saud Univ, Dept Chem Engn, Coll Engn, Riyadh 11421, Saudi Arabia
[4] Univ Punjab, Ctr Excellence Solid State Phys, New Campus, Lahore 54590, Pakistan
[5] King Saud Univ, Ind Catalysts Res Chair, Riyadh 11421, Saudi Arabia
来源：
ADVANCES IN CONDENSED MATTER PHYSICS | 2016年 / 2016卷
关键词：
CONDUCTIVITY; RELAXATION;
D O I：
10.1155/2016/4793434
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
TiO2/polypyrrole composites with high dielectric constant have been synthesized by in situ polymerization of pyrrole in an aqueous dispersion of low concentration of TiO2, in the presence of small amount of HCl. Structural, optical, surface morphological, and thermal properties of the composites were investigated by X-ray diffractometer, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, and thermogravimetric analysis, respectively. The data obtained from diffractometer and thermal gravimetric analysis confirmed the crystalline nature and thermal stability of the prepared composites. The dielectric constant of 5wt% TiO2 increased with filler content up to 4.3 x 10(3) at 1 kHz and then decreased to 1.25 x 10(3) at 10 kHz.
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页数：6
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