Progress in Electrospun Polymer Composite Fibers for Microwave Absorption and Electromagnetic Interference Shielding

Abstract

Advancements in technology and widespread usage of electronic equipment have led to a vast hike in electromagnetic pollution such as electromagnetic interference (EMI). This has resulted in major concerns regarding human health and improper functioning of electronic devices. Therefore, high-performance EMI shielding materials are necessary to ensure human well-being and protect systems in domestic, civil, or military applications. Earlier, metals and alloys of metals served as EMI shielding materials. But due to their heavy weight, low corrosion resistance, and advancements in miniaturization of electronic devices, currently, metals have only restricted applications in EMI shielding. Thus, flexible, lightweight, and high-performance EMI shielding materials assume great significance. Polymer composites have emerged as a better alternative to EMI shielding materials because of their light weight, corrosion resistance, and ease of fabrication. This article reviews the important literature on electrospun polymer composite fibers for EMI shielding applications. Fabrication methods and different types of fillers and their influence on EMI shielding properties are discussed in detail. The article tries to highlight the huge potential of the electrospinning technique toward the development of specialty materials for EMI shielding.

Electrospinning: The Technique and Applications

“…The diameter of these fibers ranges from nanometers to a few micrometers (μm). One of the primary advantages of electrospinning is its adaptability in processing, which allows it to create fibers with a variety of configurations and morphological structures [19,28]. Figure 1 represents the schematic diagram of the basic electrospinning set-up.…”

“…To understand the basic principle of the electrospinning process, consider a spherically charged droplet of a low-molecular-weight conducting liquid that is placed in a vacuum. The liquid droplet experiences two forces: (1) disintegrative repulsive Basic setup of electrospinning [28].…”

Flexible N-Doped Carbon Nanofiber-Polydimethylsiloxane Composite Containing La0.85Sr0.15CoO3−δ Nanoparticles for Green EMI Shielding

“…Due to their combined electrical conductivity, magnetic characteristics, and in particular, the nanofibrous structure, 1D electromagnetic nanofibrous composites can be used as effective electromagnetic shields. 22 However, only a few studies have reported the use of such materials as EMI shields. 27 Im et al 28 achieved maximum overall shielding effectiveness of 50 dB for fluorinated carbon black/CNF composites with 0.5 mm thick samples in the frequency range of 800 MHz−4 GHz.…”

“…One of the effective ways to incorporate metal oxide nanoparticles into 1D CNFs is electrospinning. Electrospinning is a fiber-spinning method that employs electrostatic forces to make long and continuous fibers of diameters in the nanometer to micrometer range. − Nanofibers from polymer solutions or melts can be conveniently produced using this technique. Metal and metal oxide NPs can be incorporated into the nanofibers through electrospinning.…”

Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

“…CMS effectually constrains the polysulfides using chemical interactions and enhances the reaction kinetics of polysulfide conversion. Additionally, the carbon nanotubes augment the electronic conductivity of the system, provide structural stability, and render physical entrapment of polysulfides. , Consequently, the cell demonstrated enhanced charge storage capability and electrochemical results with negligible self-discharge.…”