Recent Progress in Electromagnetic Interference Shielding Performance of Porous Polymer Nanocomposites—A Review

Abstract

The urge to develop high-speed data transfer technologies for futuristic electronic and communication devices has led to more incidents of serious electromagnetic interference and pollution. Over the past decade, there has been burgeoning research interests to design and fabricate high-performance porous EM shields to tackle this undesired phenomenon. Polymer nanocomposite foams and aerogels offer robust, flexible and lightweight architectures with tunable microwave absorption properties and are foreseen as potential candidates to mitigate electromagnetic pollution. This review covers various strategies adopted to fabricate 3D porous nanocomposites using conductive nanoinclusions with suitable polymer matrices, such as elastomers, thermoplastics, bioplastics, conducting polymers, polyurethanes, polyimides and nanocellulose. Special emphasis has been placed on novel 2D materials such as MXenes, that are envisaged to be the future of microwave-absorbing materials for next-generation electronic devices. Strategies to achieve an ultra-low percolation threshold using environmentally benign and facile processing techniques have been discussed in detail.

A comparative analysis of flexible pvdf based smart films for advanced electromagnetic shielding applications using a machine learning approach

“…So, the mobile charge carriers interact with the incoming EM wave and redistribute the charge to flow along the conductor, creating an opposing magnetic field. Therefore, the higher the material's conductivity, the better the shielding characteristics [9]. In the same manner, the absorption mechanism mainly cats on attenuating the magnetic components of the EM wave.…”

Preparation and Characteristic of the Novel Multiple-Layer Thermal Insulation Nanocomposite Materials

“…Aerogels, as a kind of emerging lightweight porous materials, , have been widely used in various fields like thermal insulation, EMI shielding, sensors, plasmonics, etc. − In particular, inorganic ceramic aerogel has unique advantages in the field of high temperature insulation. Silica oxide aerogels, as a typical inorganic ceramic aerogel, have ultralow thermal conductivity, high-temperature stability, and biodegradability. , Silica oxide aerogel is prepared by sol precursors, which include the organic and inorganic precursors. − The conventional aerogel prepared by organic precursors always produces distinct volume shrinkage during the heating treatment process above 600 °C, and the unsatisfactory thermal stability results from the particle agglomeration and pore collapse.…”

Polymeric Fe3O4 Nanoparticle/Carbon Nanofiber Hybrid Nanocomposite Coatings for Improved Terahertz Shielding

“…9 Conducting polymer nanocomposites offer potentially a cost-effective and processfriendly alternative to metals and other conventional composites. 10,11 These are attractive for several appealing reasons such as lightness, corrosion resistance, flexibility, easy processing, and broad band absorption. 9 Advanced polymer composites are designed by choosing the type, size, and shape of nanofillers as the reinforcement component in the polymer matrix.…”

“…In EMI shielding, electromagnetic waves are reflected or absorbed by a structured material to prevent unfavorable radiations. , The microstructures containing either conductive nano-inclusions or magnetic NPs or the combination of both are accustomed to tailoring the shielding effectiveness (SE) through manipulation of electrical conductivity, permittivity, and magnetic permeability . Conducting polymer nanocomposites offer potentially a cost-effective and process-friendly alternative to metals and other conventional composites. , These are attractive for several appealing reasons such as lightness, corrosion resistance, flexibility, easy processing, and broad band absorption . Advanced polymer composites are designed by choosing the type, size, and shape of nanofillers as the reinforcement component in the polymer matrix.…”