The influence of morphology, structure, and weight fraction of magnetic additives on the electromagnetic characteristics of composites

Pinto, Simone de Souza; Machado, João Paulo Barros; Gomes, Newton Adriano Santos; Rezende, Mirabel Cerqueira

doi:10.1016/j.jmmm.2019.03.085

Cited by 19 publications

(6 citation statements)

References 31 publications

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“…The high aspect ratio of the nanoparticles facilitates the contacts between the tubes in the BP, promoting losses due to interfacial contact. This suggests an efficient electrical conduction mechanism, providing high microwave attenuations values in the nanostructured composite .…”

Section: Resultsmentioning

confidence: 84%

“…Thus, the reflectivity values observed for the GF/EP laminate are attributed to their transparent behavior, which favored the wave propagation through it and the wave reflection on the metallic plate positioned in the back of the sample holder (see section Electromagnetic tests). However, as previously mentioned in the literature [64], a desirable RAM laminate should comply with wider frequency bandwidths and attenuations values below −10 dB (> 90%). Therefore, the base laminate cannot be considered a good option as RAM.…”

Section: Reflectivity Measurementsmentioning

confidence: 82%

“…Such a power decrease is associated with a "perfect" reflection, which is very close to the reflection of a flat metallic plate. Therefore, the perfect reflection around 0 dB is the reference level taken for the calibration of the microwave network analyzer (PNA-L N5230C) [64]. The reflectivity curves of the reference and the BP-based laminates in the frequency range of 8.…”

Section: Reflectivity Measurementsmentioning

confidence: 99%

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Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

Ribeiro

Corredor

Costa

et al. 2020

Polymer Engineering & Sci

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In this work, multiwalled carbon nanotube buckypaper (MWCNT‐BP) was inserted at the middle‐plane of glass fiber/epoxy resin prepregs to obtain three‐phase nanostructured composite. Preliminary tests conducted by differential scanning calorimetry and thermogravimetric analyses (TGA) revealed that the proposed curing cycle to prepare the laminates in a hot compression‐molding machine was appropriated. The mechanical properties of the BP‐based composite studied by short beam shear and compression shear tests presented no improvements compared to the base laminate. On the other hand, the thermal properties of the nanostructured composite improved as demonstrated by dynamical mechanical analyses and TGA. Besides, the reflectivity results revealed an average value of −12.2 dB in the X‐band with a maximum attenuation of 99.4% of the incident wave at 9.5 GHz. The improvements in both thermal and electromagnetic properties demonstrate the potential for both structural and multifunctional applications of the obtained BP‐composite. POLYM. ENG. SCI., 60:740–751, 2020. © 2020 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 84%

Section: Reflectivity Measurementsmentioning

confidence: 82%

Section: Reflectivity Measurementsmentioning

confidence: 99%

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Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

Ribeiro

Corredor

Costa

et al. 2020

Polymer Engineering & Sci

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“…Over the past decades, the scientific community has extensively explored the development of nanomaterials and nanocomposites, researching their synthesis, manufacturing, properties, and applications [1,2]. Nanocomposites belong to a class of composite materials where the dispersed phase has at least one nanoscale dimension [3].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Thermal and Mechanical Properties of Epoxy Resin/Aluminum Nanoparticle Composites

Pinto,

Ueno

et al. 2023

J. Mater. Sci. Technol. Res.

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In this study, we explored the development of epoxy resin nanocomposites with 0.1, 0.3%, and 1.0% by weight of aluminum nanoparticles. These nanocomposites were evaluated for mechanical properties (tensile test and Izod strength test) and thermal properties (differential scanning calorimetry and thermogravimetric analyses), and their morphology was assessed using field emission gun scanning electron microscopy. Adding even small amounts of aluminum nanoparticles led to notable improvements in the mechanical and thermal resistance. Remarkably, composites with 1.0 wt% of aluminum nanoparticles presented a 25% increase in the elastic modulus, a 20 °C increase in the glass transition temperature, and a 30 °C increase in the degradation temperature. These findings hold significant promise for advancing the field of polymer-metal nanocomposites.

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“…Samples with a thickness of 3 mm have an increase in μ" values at 15.19 GHz, with a maximum value at 15.91 GHz. It is possible that there is an increase in energy loss due to dissipative mechanisms in this frequency range(15.19 to 15.91 GHz) (de Souza Pinto et al, 2019)…”

mentioning

confidence: 99%

High Sensitivity Envelope Detector Assisted by Microwave Photonics

Gonçalves¹,

Ivo²,

Coutinho³

2022

Smart Systems: Theory and Advances

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Theory and Advances is licensed under CC BY 4.0.This license requires that reuses give credit to the creator. It allows reusers to distribute, remix, adapt, and build upon the material in any medium or format, even for commercial purposes.The content of the work and its data in its form, correctness and reliability are the sole responsibility of the authors, and do not represent the official position of Amplla Publishing. Downloading and sharing of the work is permitted as long as credit is given to the authors. All rights to this edition were ceded to Editora Amplla.

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The influence of morphology, structure, and weight fraction of magnetic additives on the electromagnetic characteristics of composites

Cited by 19 publications

References 31 publications

Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

Multifunctional Characteristics of Glass Fiber‐Reinforced Epoxy Polymer Composites with Multiwalled Carbon Nanotube Buckypaper Interlayer

Evaluation of Thermal and Mechanical Properties of Epoxy Resin/Aluminum Nanoparticle Composites

High Sensitivity Envelope Detector Assisted by Microwave Photonics

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