Dielectric properties of novel PVA/ZnO hybrid nanocomposite films

被引：209
|
作者：
Roy, Aashis S. [1 ,2 ]
Gupta, Satyajit [1 ,2 ]
Sindhu, S. [2 ]
Parveen, Ameena [3 ]
Ramamurthy, Praveen C. [1 ,2 ]
机构：
[1] Indian Inst Sci, Dept Mat Engn, Bangalore 560012, Karnataka, India
[2] Indian Inst Sci, Ctr Nanosci & Engn, Bangalore 560012, Karnataka, India
[3] Govt First Grade Coll, Dept Phys, Gurmethkal 585224, Yadgir, India
来源：
COMPOSITES PART B-ENGINEERING | 2013年 / 47卷
关键词：
Polymer-matrix composites (PMCs); Nanostructure; Hybrid; Electrical properties; ELECTRICAL-CONDUCTIVITY; CARBON NANOTUBES; AC CONDUCTIVITY; RELAXATION; COMPOSITES;
D O I：
10.1016/j.compositesb.2012.10.029
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the dielectric properties of PVA/ZnO nanocomposites films were evaluated. The composites were prepared by a solution casting technique. The dispersion and functionalization of the ZnO nanoparticles in the composite films were characterized by spectroscopic technique. The surface morphology of the PVA/ZnO nanocomposites films were elucidated using AFM. The charge transport properties were evaluated based on the dielectric and impedance spectroscopy techniques. Low ZnO loading composite shows low dielectric value at higher frequency and behaves as a lossless material. The complex impedance spectra suggest the change in conductivity, due to the change in bulk resistance of the materials and less relaxation time. Thus, all PVA/ZnO nanocomposites behave as lossless materials above 10(6) Hz indicating the composites are useful in microwave application. (c) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：314 / 319
页数：6
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