Ammonium Bicarbonate Templated 3D PDMS/rGO@CoFe2O4 Composite Foams for Effective Electromagnetic Interference Shielding and Thermal Insulation

In the past 50 years, the electronic and communication industries have grown exponentially, which has caused major concerns about electromagnetic (EM) pollution. In recent years, more thrust has been given to development of polymer composites to lessen electromagnetic interference (EMI) pollution. I...

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Veröffentlicht in:Advanced engineering materials 2024-05, Vol.26 (9), p.n/a
Hauptverfasser: Prabagar, C. Joseph, Anand, S., Mary Martina, M., Asisi Janifer, M., Pauline, S.
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container_issue 9
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creator Prabagar, C. Joseph
Anand, S.
Mary Martina, M.
Asisi Janifer, M.
Pauline, S.
description In the past 50 years, the electronic and communication industries have grown exponentially, which has caused major concerns about electromagnetic (EM) pollution. In recent years, more thrust has been given to development of polymer composites to lessen electromagnetic interference (EMI) pollution. In the present work, porous polydimethylsiloxane (PDMS) composite foams based on cobalt ferrite (CoFe2O4) and reduced graphene oxide (rGO) are produced through the ammonium bicarbonate template approach. The resulting foams possess increased EMI shielding effectiveness via the absorption‐dominated mechanism due to the fact that PDMS foam functions as a three‐dimensional (3D) network, rGO offers the requisite conductive channel, and CoFe2O4 produces the necessary magnetic loss. The total EMI shielding effectiveness (SE) of PDMS/rGO composite foams without CoFe2O4 is 24 dB, however, with different weight percentages of CoFe2O4 added (3%, 6%, and 9%), the EMI SE increases to 41 dB for 3 mm thickness. The heat insulation performance of the material is also studied, and the measured thermal conductivity is 0.0391 Wm−1 K−1, which is very low value. The attributes of the composite foam underscore its excellent thermal insulation performance and its capacity for EMI shielding, rendering it highly suitable for diverse applications across various fields. Reduced graphene oxide (rGO) and cobalt ferrite based polydimethylsiloxane (PDMS) composite foams are prepared via simple ammonium bicarbonate template method. The composite foams demonstrate strong electromagnetic interference (EMI) shielding effectiveness (SE) (41 dB) and low thermal conductivity (0.0391 W m−1 K−1), enhancing their utility for various applications requiring both properties.
doi_str_mv 10.1002/adem.202302162
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The total EMI shielding effectiveness (SE) of PDMS/rGO composite foams without CoFe2O4 is 24 dB, however, with different weight percentages of CoFe2O4 added (3%, 6%, and 9%), the EMI SE increases to 41 dB for 3 mm thickness. The heat insulation performance of the material is also studied, and the measured thermal conductivity is 0.0391 Wm−1 K−1, which is very low value. The attributes of the composite foam underscore its excellent thermal insulation performance and its capacity for EMI shielding, rendering it highly suitable for diverse applications across various fields. Reduced graphene oxide (rGO) and cobalt ferrite based polydimethylsiloxane (PDMS) composite foams are prepared via simple ammonium bicarbonate template method. 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subjects ammonium bicarbonate template
CoFe2O4
EMI shielding
thermal insulation
title Ammonium Bicarbonate Templated 3D PDMS/rGO@CoFe2O4 Composite Foams for Effective Electromagnetic Interference Shielding and Thermal Insulation
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