Microwave Absorption in MWNTs-Based Soft Composites Containing Nanocrystalline Particles as Magnetic Core and Intrinsically Conducting Polymer as a Conductive Layer

Viraj Bhingardive; Tesfakiros Woldu; Sourav Biswas; Goutam Prasanna Kar; Sabu Thomas; Nandakumar Kalarikkal; Suryasarathi Bose

doi:10.1002/slct.201601056

Microwave Absorption in MWNTs-Based Soft Composites Containing Nanocrystalline Particles as Magnetic Core and Intrinsically Conducting Polymer as a Conductive Layer

Viraj Bhingardive, Tesfakiros Woldu, Sourav Biswas, Goutam Prasanna Kar, Sabu Thomas, Nandakumar Kalarikkal, Suryasarathi Bose

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Microwave absorbers derived using poly(vinylidene fluoride) (PVDF), super paramagnetic nanocrystalline calcium ferrite (CaFe₂O₄) and multiwall nanotubes (MWNTs) were developed in this study. Effect of in-situ modification of CaFe₂O₄ and MWNTs with a conducting layer, (polyaniline, PANI) on different properties of the composite has been investigated systematically. Two approaches were investigated here to gain insight into the mechanism of microwave absorption. Firstly, coating PANI onto CaFe₂O₄ and blending along with MWNTs; secondly, coating PANI onto MWNTs and blending along with CaFe₂O₄. The electrical and magnetic properties of various composites containing hybrid particles were evaluated. Interestingly, the PVDF composites containing PANI coated CaFe₂O₄ blended together with MWNTs showed excellent shielding effectiveness (-57 dB at 18 GHz) as compared to the second approach where PANI was coated onto MWNTs and blended along with CaFe₂O₄. This was discussed here with respect to the relative permittivity and permeability in a wide range of frequency.

Original language	English
Pages (from-to)	4747-4752
Number of pages	6
Journal	ChemistrySelect
Volume	1
Issue number	15
DOIs	https://doi.org/10.1002/slct.201601056
State	Published - 16 Sep 2016
Externally published	Yes

Keywords

Calcium ferrite
EMI shielding
MWNT
PVDF

ASJC Scopus subject areas

General Chemistry

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10.1002/slct.201601056

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title = "Microwave Absorption in MWNTs-Based Soft Composites Containing Nanocrystalline Particles as Magnetic Core and Intrinsically Conducting Polymer as a Conductive Layer",

abstract = "Microwave absorbers derived using poly(vinylidene fluoride) (PVDF), super paramagnetic nanocrystalline calcium ferrite (CaFe2O4) and multiwall nanotubes (MWNTs) were developed in this study. Effect of in-situ modification of CaFe2O4 and MWNTs with a conducting layer, (polyaniline, PANI) on different properties of the composite has been investigated systematically. Two approaches were investigated here to gain insight into the mechanism of microwave absorption. Firstly, coating PANI onto CaFe2O4 and blending along with MWNTs; secondly, coating PANI onto MWNTs and blending along with CaFe2O4. The electrical and magnetic properties of various composites containing hybrid particles were evaluated. Interestingly, the PVDF composites containing PANI coated CaFe2O4 blended together with MWNTs showed excellent shielding effectiveness (-57 dB at 18 GHz) as compared to the second approach where PANI was coated onto MWNTs and blended along with CaFe2O4. This was discussed here with respect to the relative permittivity and permeability in a wide range of frequency.",

keywords = "Calcium ferrite, EMI shielding, MWNT, PVDF",

author = "Viraj Bhingardive and Tesfakiros Woldu and Sourav Biswas and Kar, {Goutam Prasanna} and Sabu Thomas and Nandakumar Kalarikkal and Suryasarathi Bose",

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year = "2016",

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doi = "10.1002/slct.201601056",

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AU - Bhingardive, Viraj

AU - Woldu, Tesfakiros

AU - Biswas, Sourav

AU - Kar, Goutam Prasanna

AU - Thomas, Sabu

AU - Kalarikkal, Nandakumar

AU - Bose, Suryasarathi

PY - 2016/9/16

Y1 - 2016/9/16

N2 - Microwave absorbers derived using poly(vinylidene fluoride) (PVDF), super paramagnetic nanocrystalline calcium ferrite (CaFe2O4) and multiwall nanotubes (MWNTs) were developed in this study. Effect of in-situ modification of CaFe2O4 and MWNTs with a conducting layer, (polyaniline, PANI) on different properties of the composite has been investigated systematically. Two approaches were investigated here to gain insight into the mechanism of microwave absorption. Firstly, coating PANI onto CaFe2O4 and blending along with MWNTs; secondly, coating PANI onto MWNTs and blending along with CaFe2O4. The electrical and magnetic properties of various composites containing hybrid particles were evaluated. Interestingly, the PVDF composites containing PANI coated CaFe2O4 blended together with MWNTs showed excellent shielding effectiveness (-57 dB at 18 GHz) as compared to the second approach where PANI was coated onto MWNTs and blended along with CaFe2O4. This was discussed here with respect to the relative permittivity and permeability in a wide range of frequency.

AB - Microwave absorbers derived using poly(vinylidene fluoride) (PVDF), super paramagnetic nanocrystalline calcium ferrite (CaFe2O4) and multiwall nanotubes (MWNTs) were developed in this study. Effect of in-situ modification of CaFe2O4 and MWNTs with a conducting layer, (polyaniline, PANI) on different properties of the composite has been investigated systematically. Two approaches were investigated here to gain insight into the mechanism of microwave absorption. Firstly, coating PANI onto CaFe2O4 and blending along with MWNTs; secondly, coating PANI onto MWNTs and blending along with CaFe2O4. The electrical and magnetic properties of various composites containing hybrid particles were evaluated. Interestingly, the PVDF composites containing PANI coated CaFe2O4 blended together with MWNTs showed excellent shielding effectiveness (-57 dB at 18 GHz) as compared to the second approach where PANI was coated onto MWNTs and blended along with CaFe2O4. This was discussed here with respect to the relative permittivity and permeability in a wide range of frequency.

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Microwave Absorption in MWNTs-Based Soft Composites Containing Nanocrystalline Particles as Magnetic Core and Intrinsically Conducting Polymer as a Conductive Layer

Abstract

Keywords

ASJC Scopus subject areas

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