Simone de Souza Pinto
Metropolitan University
ParticleComposite numberMatrix (chemical analysis)Analytical chemistryMass fractionPermeability (electromagnetism)Thermal analysisConductivityDielectricConductive polymerElectromagnetic radiationRadiationComposite materialEpoxyMonomerPermittivityHigh-density polyethyleneAttenuationScatteringMaterials scienceAspect ratio (image)Electrical conductorDiffractionElectromagnetic shieldingParticulatesScanning electron microscopeCarbonyl ironReflection lossPolyanilineKu bandRange (particle radiation)Thermal mechanicalRadar-absorbent materialFerrite (magnet)Elastic modulusCarbon blackMicrowaveCrystallinityCarbon nanotubePolymerMetalElectrical resistivity and conductivityLinear low-density polyethyleneDissipation factor
10Publications
5H-index
36Citations
Publications 10
Newest
#1Simone de Souza Pinto (Metropolitan University)H-Index: 5
#1Simone de Souza Pinto (Metropolitan University)H-Index: 1
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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Abstract This study deals with different magnetic additives based on ferrites (MnZn, LaCa (Co and Ti)), carbonyl iron (CI), and iron filaments (IF) formulated in epoxy resin. Morphological and structural characteristics of the additives were evaluated. Based on these additives samples with both different thickness and weight fractions (1-70 wt%) were prepared. The formulated composites were analyzed considering different electromagnetic characteristics: reflectivity, shielding effectiveness, the...
9 CitationsSource
This paper presents the influence of different sizes of carbonyl iron particles on the reflectivity measurements of Radar Absorbing Material (RAM). The electromagnetic characterization was performed with a vector network analyzer and a rectangular waveguide in the frequency range of 12.4 to 18GHz (Ku Band). The influence of different parameters such as thicknesses, particle sizes and concentration of carbonyl iron were evaluated. Reflectivity results showed the influence of these parameters on t...
3 CitationsSource
#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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This work deals with the study of radar absorbing materials (RAM) based on conductive samples obtained with polyaniline (PAni) (5-20 wt%) inserted in epoxy resin matrix. SEM analyses show that the PAni presents granular morphology, with an average diameter of 5 µm, with structures evenly distributed. DRX and FT-IR analyses show that the PAni polymer was successfully obtained in its conductive form. Electrical permittivity and magnetic permeability measurements of PAni/epoxy samples were performe...
Source
#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 4 authors...
Abstract This study aims to combine dielectric and magnetic properties of different materials in an unique composite. For this, poly(o-methoxyaniline), POMA, was chemically synthesized in situ on magnetic metallic filaments (MF). The obtained composite was inserted into an epoxy resin matrix in the proportions of 40, 50 and 70%, in weight (wt%). The samples were characterized by scanning electron microscopy (SEM), X ray diffraction (XRD) and electromagnetic measurements. On the last case, the me...
5 CitationsSource
2 Citations
#1Patrick Valadão de Faria (UNIFESP: Federal University of São Paulo)H-Index: 1
#2Eduardo Henrique Backes (UFSCar: Federal University of São Carlos)H-Index: 7
Last. Fabio Roberto Passador (UNIFESP: Federal University of São Paulo)H-Index: 15
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Source
#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 4 authors...
This work aims to show the behavior of radar absorbing materials (RAM) based on magnetic metallic additives with different aspect ratios. For this, two materials, carbonyl iron, constituted of spherical iron particles, and carbon-steel filaments were used. These additives were characterized considering their morphological and structural features. X-ray diffraction analysis shows that the two additives have the same crystallographic structure, but their morphologies are quite different in microme...
2 CitationsSource
#1Fabio Roberto Passador (UNIFESP: Federal University of São Paulo)H-Index: 15
#2Patrick Valadão de Faria (UNIFESP: Federal University of São Paulo)H-Index: 1
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
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Conducting polymers have attracted a great scientific and technological interest due to their interesting properties, particularly its high electrical conductivity. The polyanilines stand out because of the ease of doping with protonic acids and their chemical stability in the doped form. The processability of conducting polymers is a crucial factor in the use of their electrical and electrochemical properties in technological applications. In this work, the processability of linear low-density ...
6 CitationsSource
#1Simone de Souza Pinto (UNIFESP: Federal University of São Paulo)H-Index: 5
#2Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 34
Last. Mirabel Cerqueira Rezende (UNIFESP: Federal University of São Paulo)H-Index: 1
view all 2 authors...
This work deals with the study of radar absorbing materials (RAM) based on conductive composites obtained by synthesis in situ of poly(o-methoxyaniline) (POMA) and polyaniline (PAni), respectively, on carbon black (CB) particles. Samples containing 20 wt.% of POMA/CB and 20 wt.% of PAni/CB in epoxy resin were prepared. Electrical conductivity results show that POMA/CB (7.9 × 10−2 S cm−1) and PAni/CB (4.1 × 10−1 S cm−1) composites present higher values than the neat POMA (5.4 × 10−4 S cm−1) and P...
6 CitationsSource
This study involves the preparation of conducting composites based on poly(o-methoxyaniline) (POMA) and carbon nanotubes (CNT) and the evaluation of them as radar absorbing materials (RAM), in the frequency range of 8.2ź12.4źGHz (X-band). The composites were obtained by synthesis in situ of POMA in the presence of CNT (0.1 and 0.5źwt% in relation to the o-methoxyaniline monomer). The resulting samplesźPOMA/CNT-0.1źwt% and POMA/CNT-0.5źwt%źwere incorporated in an epoxy resin matrix in the proport...
4 CitationsSource