TY - JOUR
T1 - Superior electromagnetic wave absorption performance of Fe3O4 modified graphene assembled porous carbon (mGAPC) based hybrid foam
AU - Bhaskara Rao, B. V.
AU - Jena, Maheswar
AU - Aepuru, Radhamanohar
AU - R, Udayabhaskar
AU - Ramalinga Viswanathan, Mangalaraja
AU - Gonzalez, Rodrigo Espinoza
AU - Kale, Sangeeta N.
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/10/15
Y1 - 2022/10/15
N2 - High performance Fe3O4 modified graphene assembled porous carbon (mGAPC) based epoxy paint coated on Polyethylene (PE) foam is realized by spray technique to fabricate light weight electromagnetic absorbers. The mGAPC as a pigment in a standard composition of commercial paint was optimized and the influence of solvent and additives are studied to achieve X-band (8.2–12.4 GHz) electromagnetic wave absorption (EA) in the hybrid foam (HF). From the comparative studies, the hybrid foams obtained from epoxy paint with toluene as solvent (without Mn-octate as additive) showed a Reflection Loss (RL) −19 dB (in the range of 8.3–8.7 GHz), which was further increased with the coating cycles up to −43 dB (in 10.2–11.2 GHz).The observed rise is attributed to increase in localized interfacial polarization that arises at the combined interfaces of mGAPC. The result showed 99% loss, which projects a promising EA paint for practical applications. Further thickness dependent studies of EA in Paint Coat HF1, reveals that with increasing thickness from 0.3 to 2 mm, the RL also increases from −19 to −43 dB with changing absorption band. The superior EA properties are correlated to the percolation threshold, pigment dispersibility and further correlated to the strong absorption, destructive interference, multiple internal reflections and interfacial polarization of the radiation in the hybrid foam. Moreover, considering the paint lowest thickness ∼0.3 mm with −19 dB of RL, the hybrid foam promises a cost-effective, fine, light-weight EA/RL material for secure electronic devices and packaging in civil and defence applications.
AB - High performance Fe3O4 modified graphene assembled porous carbon (mGAPC) based epoxy paint coated on Polyethylene (PE) foam is realized by spray technique to fabricate light weight electromagnetic absorbers. The mGAPC as a pigment in a standard composition of commercial paint was optimized and the influence of solvent and additives are studied to achieve X-band (8.2–12.4 GHz) electromagnetic wave absorption (EA) in the hybrid foam (HF). From the comparative studies, the hybrid foams obtained from epoxy paint with toluene as solvent (without Mn-octate as additive) showed a Reflection Loss (RL) −19 dB (in the range of 8.3–8.7 GHz), which was further increased with the coating cycles up to −43 dB (in 10.2–11.2 GHz).The observed rise is attributed to increase in localized interfacial polarization that arises at the combined interfaces of mGAPC. The result showed 99% loss, which projects a promising EA paint for practical applications. Further thickness dependent studies of EA in Paint Coat HF1, reveals that with increasing thickness from 0.3 to 2 mm, the RL also increases from −19 to −43 dB with changing absorption band. The superior EA properties are correlated to the percolation threshold, pigment dispersibility and further correlated to the strong absorption, destructive interference, multiple internal reflections and interfacial polarization of the radiation in the hybrid foam. Moreover, considering the paint lowest thickness ∼0.3 mm with −19 dB of RL, the hybrid foam promises a cost-effective, fine, light-weight EA/RL material for secure electronic devices and packaging in civil and defence applications.
KW - Electromagnetic wave absorption (EA)
KW - FeO modified graphene assembled porous carbon (mGAPC)
KW - Reflection loss (RL)
UR - http://www.scopus.com/inward/record.url?scp=85135298542&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2022.126512
DO - 10.1016/j.matchemphys.2022.126512
M3 - Article
AN - SCOPUS:85135298542
SN - 0254-0584
VL - 290
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
M1 - 126512
ER -