Morphological, Electromagnetic, and Absorbing Properties 
of POMA and PAni/Carbon Black Composites

Pinto, Simone de Souza; Rezende, Mirabel Cerqueira

doi:10.1007/s11664-017-5492-y

Cited by 9 publications

(3 citation statements)

References 30 publications

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“…The measured reflection loss of the PPCP composited with 0.2 wt.% of carbon approaches −11.16 dB at 12.4 GHz for a 7.0 mm thickness, which corresponds to ≤ −10 dB reflection loss (i.e., more than 90% absorption of the incoming radar wave). These data are comparable with those of the carbonbased radar-absorbing materials reported in the literature, such as carbon nanotube-based composites (98.54% absorption at 11.1 GHz with a thickness of 2.0 mm [12], 98.4% absorption at 8 GHz with a thickness of 4.0 mm [11]), and carbon-based composites (99.5% absorption at 11.5 GHz with a thickness of 4.0 mm [13]). Compared to the above mentioned literature data, the reflection loss of the PPCP composited with 0.2 wt.% of carbon was acceptable, because a selfsetting particle-stabilized porous ceramic panel is lowcost (the inexpensive raw materials), lightweight (the particle-stabilized pore structure), and easy to prepare (the self-setting fabrication method).…”

Section: Resultssupporting

confidence: 87%

“…In particular, carbon-based conductive particles have been widely used because of their good absorption performance in the high frequency bands [10]. These include carbon nanotube-based composites [11,12] and carbon-based composites [13,14]. Because porous ceramics are both inherently lightweight and inexpensive, it is worthwhile to study them as low-cost lightweight radar absorbing materials.…”

Section: Introductionmentioning

confidence: 99%

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A self-setting particle-stabilized porous ceramic panel prepared from commercial cement and loaded with carbon for potential radar-absorbing applications

Ryung

Lee

et al. 2018

PAC

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Porous ceramic materials are in a current research focus because of their outstanding thermal stability, chemical stability and lightweight. Recent research has widened the range of applications to radar absorption to utilize the advantages of porous ceramic materials. There has been long-standing interest in the development of lightweight radar-absorbing materials for military applications such as camouflaging ground-based facilities against airborne radar detection. Therefore, in this study, a novel lightweight radar-absorbing material for X-band frequencies was developed using a self-setting particle-stabilized porous ceramic panel composited with carbon. The panel was prepared using a commercial calcium aluminate cement (as a self-setting matrix), zeolite 13X particles with propyl gallate (as a particle-stabilized pore former) and carbon (as a radar-absorbing material). The panel contained macropores approximately 200 to 400 µm in size formed by zeolite 13X particles that are irreversibly adsorbed at liquid-gas interfaces. The self-setting particle-stabilized porous ceramic panels were characterized by scanning electron microscopy, mercury porosimetry, physisorption analysis, capillary flow porosimetry and network analysis. When 0.2 wt.% carbon was added to a selfsetting particle-stabilized porous ceramic panel to fabricate a composite 7 mm thick, the maximum reflection loss was −11.16 dB at 12.4 GHz. The effects of the amount of added carbon and the thickness variation of a self-setting particle-stabilized porous ceramic panel on the radar-absorbing properties remain important issues for further research.

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Section: Resultssupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

A self-setting particle-stabilized porous ceramic panel prepared from commercial cement and loaded with carbon for potential radar-absorbing applications

Ryung

Lee

et al. 2018

PAC

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“…Nowadays, materials with properties of reflectivity and electromagnetic interference (EMI) shielding effectiveness (SE) have attracted intensive attention in aerospace, engineering, and telecommunication areas, all with civil and military applications 1–6 . Carbon nanomaterials such as carbon nanotubes (CNT), carbon nanofibers, graphite nanoplatelets, and carbon black 3,7–12 are good candidates for developing composites that attend the technological challenges and specifications of the market demands in the mentioned areas. On the other hand, the fiber‐reinforced polymer (FRP) composites have received particular attention due to their low weight, resistance to corrosion, flexibility, and processing advantages 13–15 …”

Section: Introductionmentioning

confidence: 99%

Morphological, mechanical, and electromagnetic interference shielding effectiveness characteristics of glass fiber/epoxy resin/MWCNT buckypaper composites

Corredor

Santos

Botelho

et al. 2021

J of Applied Polymer Sci

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Glass fiber/epoxy resin composites (GF/EP) using one and three multi-walled carbon nanotube buckypapers (BP) were obtained and their complex parameters, reflectivity, and electromagnetic interference (EMI) shielding effectiveness (SE) at X-band (8.2-12.4 GHz) and Ku-band (12.4-18 GHz) were evaluated. The preparation of BP used polyacrylonitrile (PAN) nanofibers (PF These composites show both large storage and energy loss capacity in both bands revealing promising results related to EMI SE applications. Besides, a high attenuation of around 67% and 72% were achieved for BP based composites. The cross-section view of the buckypaper and the laminates was analyzed by scanning electron microscopy (SEM). The incorporation of the CNT film into the laminates showed no improvements in the elastic properties through dynamic mechanical analyses (DMA). Nevertheless, a decrease in the shear properties by the compression shear test (CST) and interlaminar shear strength (ILSS) has been observed. GF/EP/BP/PF composite presented a reduction of 29 and 39% in its ILSS properties compared to the base laminate (GF/EP). Also, the decrease was even more significant, revealing a steep reduction in its CST properties. On the other hand, the removal of the pan nanofiber (PF) led to better mechanical properties for GF/EP/BP/RPF composites. Results have shown ILSS values of 47.4 ± 2.2 MPa which are close to the base laminate (52.4 ± 3.1 MPa). The removal of the PF provided larger porous in the CNT network, making the impregnation by epoxy easier in the BP/RPF which resulted in improved shear properties compared to GF/EP/BP/PF samples. K E Y W O R D S composites, graphene, and fullerenes, mechanical properties, nanotubes, thermosets 1 | INTRODUCTION Nowadays, materials with properties of reflectivity and electromagnetic interference (EMI) shielding effectiveness (SE) have attracted intensive attention in aerospace, engineering, and telecommunication areas, all with civil and military applications. 1-6 Carbon nanomaterials such as carbon nanotubes (CNT), carbon nanofibers, graphite nanoplatelets, and carbon black 3,7-12 are good candidates for developing composites that attend the technological

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S‐parameters, electrical permittivity, and absorbing energy measurements of carbon nanotubes‐based composites in X‐band

Silva

Rezende

2020

J of Applied Polymer Sci

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Composites based on carbon nanotubes (CNT) have recently received great attention as a possible new generation of radar absorbing materials (RAM), due to their efficient microwave attenuation capacity and low density. However, RAM performance can vary significantly depending on the CNT being used. Aiming to directly show the influence of CNT from two different suppliers, both multi‐walled and non‐functionalized (CNT‐B and CNT‐K), the electromagnetic behaviors of RAM processed in epoxy resin are compared. Scattering parameters (S‐parameters), complex electrical permittivity and magnetic permeability, and absorbed energy of the composites in the X‐band (8.2–12.4 GHz) are evaluated. The results clearly show the influence of the two different CNT on the electromagnetic characteristics of composites. CNT‐B based composites behave as broadband RAM with the tendency of better attenuation results above 12.4 GHz. On the other hand, CNT‐K based composites show good attenuation results in the X‐band (>99%). Undoubtedly, the results confirm that the longer length of CNT‐K favored the interconnection among the filaments, as well as, the formation of compact agglomerates surrounded by resin rich regions, which favored the impedance matching and mechanisms of losses in the processed RAM.

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Morphological, Electromagnetic, and Absorbing Properties of POMA and PAni/Carbon Black Composites

Cited by 9 publications

References 30 publications

A self-setting particle-stabilized porous ceramic panel prepared from commercial cement and loaded with carbon for potential radar-absorbing applications

A self-setting particle-stabilized porous ceramic panel prepared from commercial cement and loaded with carbon for potential radar-absorbing applications

Morphological, mechanical, and electromagnetic interference shielding effectiveness characteristics of glass fiber/epoxy resin/MWCNT buckypaper composites

S‐parameters, electrical permittivity, and absorbing energy measurements of carbon nanotubes‐based composites in X‐band

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