Composite Materials for Electromagnetic Interference Shielding

Šteffan, Pavel; Stehlik, J.; Vrba, R.

doi:10.1007/978-0-387-74159-8_65

Cited by 9 publications

(5 citation statements)

References 2 publications

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“…Magnesium metal has a hexagonal crystal structure, melting at about 650 °C. [ 137 ] Magnesium is a very active metal at a temperature of about 550 °C, and in air, it ignites with the flashing flare. Li metal has a BCC lattice.…”

Section: Why Mg–li Alloys As Electromagnetic Shielding Material?mentioning

confidence: 99%

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

Ashraf,

Guo,

et al. 2023

Adv Eng Mater

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Magnesium‐alloy (Mg‐alloy) materials have attracted considerable attention recently due to their potential applications in electromagnetic interference (EMI) shielding. EMI shielding is a technique to prevent unwanted electromagnetic fields from interfering with the regular operation of electronic devices and systems. EMI shielding is essential for electronics, communication, computers, aerospace, and defence, where high performance and reliability are required. A material’s EMI shielding effectiveness (SE) depends on several factors: its conductivity, magnetic permeability, reflectivity, absorption, and multiple scattering. Mg‐alloys have several advantages over other conventional shielding materials, such as Al‐alloys. These alloys have a lower density, higher specific strength and stiffness, and a higher damping capacity. Mg‐alloys also have high conductivity and magnetic permeability, which can enhance the SE of the material. Moreover, through various methods, such as alloying, heat treatment, surface treatment, and composite fabrication, Mg alloys can be modified to improve their SE and other properties. This review summarizes the recent progress and challenges in developing Mg‐alloy materials for EMI shielding applications. We discuss the effects of different factors on Mg‐alloys’ SE, such as composition, microstructure, frequency, and thickness. Also, we discuss the importance of Mg‐Li alloys and why they are better electromagnetic shielding materials than conventional Mg alloys. Finally, we provide some perspectives and suggestions for future research directions.This article is protected by copyright. All rights reserved.

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Section: Why Mg–li Alloys As Electromagnetic Shielding Material?mentioning

confidence: 99%

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

Ashraf,

Guo,

et al. 2023

Adv Eng Mater

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“…The substantial increase in the use of electrical equipment and portable electronics has led to a surge in electromagnetic interference (EMI) pollution that affects the safety and the operation of microelectronic systems [1]. Thus, the development of EMI shielding materials has received considerable attention to mitigate interference from electronic devices [2][3][4][5]. Although traditional metal-based materials have exhibited an excellent EMI shielding performance, their practical application is limited because of their difficult processability, high density, and low corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Surface-modified carbon fiber for enhanced electromagnetic interference shielding performance in thermoplastic polyurethane composites

Yi¹,

Jeong²,

Park³

et al. 2022

Funct. Compos. Struct.

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There has been a growing interest in developing carbon-based polymer composites for electromagnetic interference (EMI) shielding materials. To achieve a high EMI shielding performance, the morphology of fillers in composites must be controlled. Although carbon fibers (CFs) have remarkable thermal and electrical properties and low density, their poor dispersion behavior within polymer matrix limits their practical applications as EMI shielding materials. In this study, we report an efficient method to disperse CFs within a thermoplastic polyurethane (TPU) matrix using pyranine-functionalized polyether (Polyether–pyranine) as a dispersing agent. Polyether–pyranine was grafted on the CF surfaces through π-π interactions between the CF and pyranine groups to produce surface-modified CFs (SCFs). Compared to CFs, the SCFs exhibited an improved dispersion stability within a TPU polymer matrix. Furthermore, a TPU composite with SCFs achieved an enhanced electrical conductivity and EMI shielding performance, which was primarily ascribed to the increased structural connectivity between the SCFs due to excellent dispersion.

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“…However, polymer-based materials give less shielding against EMI as they are less conductive and have been used in combination with other materials which comes as a good absorber for electromagnetic waves [ 44 , 45 , 46 , 47 , 48 ]. The polymer-based materials have been identified as the ideal materials for EMI shielding effectiveness [ 49 , 50 ]. With the introduction of the 5th Generation (5G) telecommunication system and high frequency range electronic interfaces, the EM pollution has been increased drastically, hence, the coupling effect of EM radiation and signals interferences requires suppressed [ 51 , 52 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene and Iron Reinforced Polymer Composite Electromagnetic Shielding Applications: A Review

et al. 2021

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With advancements in the automated industry, electromagnetic inferences (EMI) have been increasing over time, causing major distress among the end-users and affecting electronic appliances. The issue is not new and major work has been done, but unfortunately, the issue has not been fully eliminated. Therefore, this review intends to evaluate the previous carried-out studies on electromagnetic shielding materials with the combination of Graphene@Iron, Graphene@Polymer, Iron@Polymer and Graphene@Iron@Polymer composites in X-band frequency range and above to deal with EMI. VOSviewer was also used to perform the keyword analysis which shows how the studies are interconnected. Based on the carried-out review it was observed that the most preferable materials to deal with EMI are polymer-based composites which showed remarkable results. It is because the polymers are flexible and provide better bonding with other materials. Polydimethylsiloxane (PDMS), polyaniline (PANI), polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF) are effective in the X-band frequency range, and PDMS, epoxy, PVDF and PANI provide good shielding effectiveness above the X-band frequency range. However, still, many new combinations need to be examined as mostly the shielding effectiveness was achieved within the X-band frequency range where much work is required in the higher frequency range.

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Composite Materials for Electromagnetic Interference Shielding

Cited by 9 publications

References 2 publications

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

Historical Progress in Electromagnetic Interference Shielding Effectiveness of Conventional Mg Alloys Leading to Mg‐Li‐Based Alloys: A Review

Surface-modified carbon fiber for enhanced electromagnetic interference shielding performance in thermoplastic polyurethane composites

Graphene and Iron Reinforced Polymer Composite Electromagnetic Shielding Applications: A Review

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