Flexible Nanocomposite Conductors for Electromagnetic Interference Shielding

Abstract

Highlights Convincing candidates of flexible (stretchable/compressible) electromagnetic interference shielding nanocomposites are discussed in detail from the views of fabrication, mechanical elasticity and shielding performance. Detailed summary of the relationship between deformation of materials and electromagnetic shielding performance. The future directions and challenges in developing flexible (particularly elastic) shielding nanocomposites are highlighted. Abstract With the extensive use of electronic communication technology in integrated circuit systems and wearable devices, electromagnetic interference (EMI) has increased dramatically. The shortcomings of conventional rigid EMI shielding materials include high brittleness, poor comfort, and unsuitability for conforming and deformable applications. Hitherto, flexible (particularly elastic) nanocomposites have attracted enormous interest due to their excellent deformability. However, the current flexible shielding nanocomposites present low mechanical stability and resilience, relatively poor EMI shielding performance, and limited multifunctionality. Herein, the advances in low-dimensional EMI shielding nanomaterials-based elastomers are outlined and a selection of the most remarkable examples is discussed. And the corresponding modification strategies and deformability performance are summarized. Finally, expectations for this quickly increasing sector are discussed, as well as future challenges.

Tailoring Interfaces of All-Carbon Electromagnetic Interference Shielding Materials for Boosting Comprehensive Performance

“…All in all, the CMC demonstrates excellent stability and diverse substrate choices, which can satisfy the requirements in various complex scenarios. 13 Photothermal and Joule Heating Properties. With continuous development, not only excellent EMI shielding performance but also other integrated functions are demanded for EMI shielding material.…”

“…While the CMC sample grown on WCNT paper and carbon nanotube film is rigid. All in all, the CMC demonstrates excellent stability and diverse substrate choices, which can satisfy the requirements in various complex scenarios …”

“…In recent years, various materials i.e. carbon materials, transition-metal carbide (MXenes), metal oxide nanoparticles, liquid metal (LM), and conducting polymers have been intensively investigated as promising alternatives to traditional metal-based EMI materials. ,,, Among them carbon nanotube sponges (CNTS) with tunable porous structures, lightweight, high conductivity, corrosion resistance, and excellent processability have been considered as an excellent fundamental platform to construct multifunctional EMI shielding materials. , Moreover, compared to dense and layered materials like graphene or MXene, porous CNTS-based EMI shielding materials exhibit high absorption and low reflection characteristics, which will significantly minimize the secondary electromagnetic pollution and provide further convenience to arrange devices. Unfortunately, the limited total shielding ability of CNTS (less than 50 dB) always impedes the application as compared to other high-shielding materials.…”

Carbon Nanofibrous Aerogels Derived from Electrospun Polyimide for Multifunctional Piezoresistive Sensors

“…Their potential applications in human health monitoring, electronic skin, intelligent hyperthermia, and human–computer interaction have garnered considerable attention. − Various sensing techniques have been utilized to successfully construct flexible strain sensors based on capacitance type, piezoresistive type, piezoelectric type, triboelectric type, and etc . Among these, the piezoresistive-based flexible strain sensor exhibits sophisticated elastic capabilities and a straightforward production method in locations that conventional metal or semiconductor sensors might not be able to reach. , Wearable piezoresistive sensors have a significant influence on personal safety and health due to their ability to monitor and quantify physiological data produced by human movements and activities. − Simultaneously, it is noteworthy that electromagnetic interference (EMI) derived from a wearable device has a substantial impact on the functionality of wearable electronic devices and robot systems, particularly those comprising very sensitive and precise components. − Hence, there is a pressing demand to develop and produce multifunctional wearable materials with capabilities of capturing human physiological information and shielding the harmful effects of electromagnetic radiation. , …”

MoS2-Based Nanocomposites for Microwave Absorption: A Review

“…In recent years, with the rapid development of the 5G and 6G era of communication technology, widely used electronic products and devices receive extra attention. − At the same time, the use of electronic equipment has caused many problems, such as serious electromagnetic radiation pollution. − As shown in Figure , the electromagnetic radiation generated by various electronic devices not only surrounds people’s daily life but also brings electromagnetic interference between devices, damage to human health, and information security and other problems. − …”