Polymers, Nanocomposites and Ionic Liquids for Electrical Applications

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (28 July 2021) | Viewed by 2923

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Departamento de Engenharia Metalurgica e de Materiais, Instituto de Macromoléculas, Centro de Tecnologia, Universidade Federal do Rio de Janeiro, 21941-594 Rio de Janeiro, Brazil
Interests: polymer blends; conducting materials; nanocomposites; epoxy resins; material characterization
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Special Issue Information

Dear Colleagues,

The growing development of telecommunications and electronic devices such as cell phones, smart phones, etc. has produced an unique and invisible form of pollution in the environment known as electromagnetic radiation. These radiations affect the operation of other electronic equipments and may affect the health of the population. Thus, the development of materials capable of shielding artifacts against electromagnetic interference has been of paramount importance.

In this context, polymeric composites containing additives able to shield the devices against electromagnetic interference present the advantage of low density, excellent electromagnetic interference shielding effectiveness (EMI SE) and other important requirements such as, design facilities, processability, flexibility and the possibility of being loaded with different fillers.

Electromagnetic interference (EMI) shielding materials also display important military application on stealth technology since they can act as radar absorbing materials (RAM). Different additives can be compounded with polymeric matrices to achieve good EMI shielding effectiveness. Some of them include carbonaceous materials, conducting polymers, ferrites and also ionic liquids.

Considering the great importance of this theme, the aim of this Special Issue is to present a selection of research papers and reviews emphasizing different materials, processing techniques, new design and structures to produce polymeric composites and nanocomposites for application as EMI shielding and also Radar absorbing materials.

Prof. Dr. Bluma Guenther Soares
Guest Editor

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Keywords

  • nanocomposites
  • polymers
  • EMI shielding
  • conducting composites
  • radar absorbing materials
  • microwave absorption

Published Papers (1 paper)

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Research

12 pages, 5789 KiB  
Article
Synthesis of Nickel Spinel Ferrites Nanoparticles Coated with Thermally Reduced Graphene Oxide for EMI Shielding in the Microwave, UV, and NIR Regions
by Asim Mansha, Khadija Zubair, Zulfiqar Ahmad Rehan, H. M. Fayzan Shakir, Talha Javed, Rubab Shabbir, Syed Khalid Mustafa, Freddy Mora-Poblete, Jing-Ru Zhou, Uttam Kumar, Mohammad S. Al-Harbi and Mohamed M. Hassan
Polymers 2021, 13(19), 3316; https://doi.org/10.3390/polym13193316 - 28 Sep 2021
Cited by 11 | Viewed by 2462
Abstract
The co-precipitation and in situ modified Hummers’ method was used to synthesize Nickel Spinal Ferrites (NiFe) nanoparticles and NiFe coated with Thermally Reduced Graphene Oxide (TRGO) (NiFe-TRGO) nanoparticles, respectively. By using polyvinyl chloride (PVC), tetrahydrofuran (THF), and NiFe-TRGO, the nanocomposite film was synthesized [...] Read more.
The co-precipitation and in situ modified Hummers’ method was used to synthesize Nickel Spinal Ferrites (NiFe) nanoparticles and NiFe coated with Thermally Reduced Graphene Oxide (TRGO) (NiFe-TRGO) nanoparticles, respectively. By using polyvinyl chloride (PVC), tetrahydrofuran (THF), and NiFe-TRGO, the nanocomposite film was synthesized using the solution casting technique with a thickness of 0.12–0.13 mm. Improved electromagnetic interference shielding efficiency was obtained in the 0.1–20 GHz frequency range. The initial assessment was done through XRD for the confirmation of the successful fabrication of nanoparticles and DC conductivity. The microstructure was analyzed with scanning electron microscopy. The EMI shielding was observed by incorporating a filler amount varying from 5 wt.% to 40 wt.% in three different frequency regions: microwave region (0.1 to 20 GHz), near-infrared (NIR) (700–2500 nm), and ultraviolet (UV) (200–400 nm). A maximum attenuation of 65 dB was observed with a 40% concentration of NiFe-TRGO in nanocomposite film. Full article
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