Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature
This paper presents the dielectric characteristics of nanocomposite films of poly(vinyl alcohol) (PVA) embedded with silver (Ag) nanoparticles and graphene oxide(GO). The nanocomposite films were fabricated by using the solvent casting approach. The morphological analysis was carried out through sca...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-02-01
|
Series: | Polymers |
Subjects: | |
Online Access: | https://www.mdpi.com/2073-4360/12/2/374 |
id |
doaj-01d553d172f340fb8be4da95e14419e7 |
---|---|
record_format |
Article |
spelling |
doaj-01d553d172f340fb8be4da95e14419e72020-11-25T00:36:20ZengMDPI AGPolymers2073-43602020-02-0112237410.3390/polym12020374polym12020374Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and TemperatureGaneswar Sahu0Mamata Das1Mithilesh Yadav2Bibhu Prasad Sahoo3Jasaswini Tripathy4School of Applied Sciences (Chemistry), Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, IndiaSchool of Applied Sciences (Chemistry), Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, IndiaDepartment of Chemistry, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for study and Research, V.B.S. Purvanchal University Jaunpur, Jaunpur 222003 U.P., IndiaSchool of Applied Sciences (Chemistry), Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, IndiaSchool of Applied Sciences (Chemistry), Kalinga Institute of Industrial Technology, Bhubaneswar, Odisha 751024, IndiaThis paper presents the dielectric characteristics of nanocomposite films of poly(vinyl alcohol) (PVA) embedded with silver (Ag) nanoparticles and graphene oxide(GO). The nanocomposite films were fabricated by using the solvent casting approach. The morphological analysis was carried out through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The dielectric relaxation behavior of nanocomposite films was analyzed in the frequency range of 10<sup>1</sup> to 10<sup>6</sup> Hz, by varying GO loading. The temperature effect was investigated over the temperature range of 40 to 150 °C. The effect of ionic liquid (IL) was also explored by comparing the dielectric behavior of films fabricated without using ionic liquid. The conductive filler loading variation showed a significant effect on dielectric permittivity(ε′), complex impedance (Z*) and electric conductivity (σ<sub>ac</sub>)<sub>.</sub> The obtained results revealed that the dielectric permittivity (ε′) increased by incorporating Ag nanoparticles and increasing GO loading in PVA matrix. An incremental trend in dielectric permittivity was observed on increasing the temperature, which is attributed to tunneling and hopping mechanism. With an increase in nanofiller loading, the real part of impedance (Z′) and imaginary part of impedance (Z″) were found to decrease. Further, the semicircular nature of Nyquist plot indicated the decrease in bulk resistivity on increasing GO loading, temperature and incorporating ionic liquid. On the basis of above findings, the obtained GO-Ag-PVA nanocomposite films can find promising applications in charge storage devices.https://www.mdpi.com/2073-4360/12/2/374dielectric permittivitygraphene oxidepoly(vinyl alcohol)polymer nanocomposite |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ganeswar Sahu Mamata Das Mithilesh Yadav Bibhu Prasad Sahoo Jasaswini Tripathy |
spellingShingle |
Ganeswar Sahu Mamata Das Mithilesh Yadav Bibhu Prasad Sahoo Jasaswini Tripathy Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature Polymers dielectric permittivity graphene oxide poly(vinyl alcohol) polymer nanocomposite |
author_facet |
Ganeswar Sahu Mamata Das Mithilesh Yadav Bibhu Prasad Sahoo Jasaswini Tripathy |
author_sort |
Ganeswar Sahu |
title |
Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature |
title_short |
Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature |
title_full |
Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature |
title_fullStr |
Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature |
title_full_unstemmed |
Dielectric Relaxation Behavior of Silver Nanoparticles and Graphene Oxide Embedded Poly(vinyl alcohol) Nanocomposite Film: An Effect of Ionic Liquid and Temperature |
title_sort |
dielectric relaxation behavior of silver nanoparticles and graphene oxide embedded poly(vinyl alcohol) nanocomposite film: an effect of ionic liquid and temperature |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2020-02-01 |
description |
This paper presents the dielectric characteristics of nanocomposite films of poly(vinyl alcohol) (PVA) embedded with silver (Ag) nanoparticles and graphene oxide(GO). The nanocomposite films were fabricated by using the solvent casting approach. The morphological analysis was carried out through scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The dielectric relaxation behavior of nanocomposite films was analyzed in the frequency range of 10<sup>1</sup> to 10<sup>6</sup> Hz, by varying GO loading. The temperature effect was investigated over the temperature range of 40 to 150 °C. The effect of ionic liquid (IL) was also explored by comparing the dielectric behavior of films fabricated without using ionic liquid. The conductive filler loading variation showed a significant effect on dielectric permittivity(ε′), complex impedance (Z*) and electric conductivity (σ<sub>ac</sub>)<sub>.</sub> The obtained results revealed that the dielectric permittivity (ε′) increased by incorporating Ag nanoparticles and increasing GO loading in PVA matrix. An incremental trend in dielectric permittivity was observed on increasing the temperature, which is attributed to tunneling and hopping mechanism. With an increase in nanofiller loading, the real part of impedance (Z′) and imaginary part of impedance (Z″) were found to decrease. Further, the semicircular nature of Nyquist plot indicated the decrease in bulk resistivity on increasing GO loading, temperature and incorporating ionic liquid. On the basis of above findings, the obtained GO-Ag-PVA nanocomposite films can find promising applications in charge storage devices. |
topic |
dielectric permittivity graphene oxide poly(vinyl alcohol) polymer nanocomposite |
url |
https://www.mdpi.com/2073-4360/12/2/374 |
work_keys_str_mv |
AT ganeswarsahu dielectricrelaxationbehaviorofsilvernanoparticlesandgrapheneoxideembeddedpolyvinylalcoholnanocompositefilmaneffectofionicliquidandtemperature AT mamatadas dielectricrelaxationbehaviorofsilvernanoparticlesandgrapheneoxideembeddedpolyvinylalcoholnanocompositefilmaneffectofionicliquidandtemperature AT mithileshyadav dielectricrelaxationbehaviorofsilvernanoparticlesandgrapheneoxideembeddedpolyvinylalcoholnanocompositefilmaneffectofionicliquidandtemperature AT bibhuprasadsahoo dielectricrelaxationbehaviorofsilvernanoparticlesandgrapheneoxideembeddedpolyvinylalcoholnanocompositefilmaneffectofionicliquidandtemperature AT jasaswinitripathy dielectricrelaxationbehaviorofsilvernanoparticlesandgrapheneoxideembeddedpolyvinylalcoholnanocompositefilmaneffectofionicliquidandtemperature |
_version_ |
1725305862330777600 |