Recent advances and perspectives on silver-based polymer composites for electromagnetic interference shielding

Abstract

Owing to the increasing threat of pollution by electromagnetic interference (EMI) wave pollution, it is increasingly imperative to design and validate new high-performance EMI shielding materials. In recent decades, silver/polymer...

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

“…Figure b–d shows that EMI SE is greater than 10 dB, indicating that multiple-reflection contribution can be ignored. As a result, the total EMI SE is dependent only on SE R and SE A and their values were calculated using eqs , , and . , SE normalT = 0.25em SE normalR + SE normalA = 10 log ( 1 T ) = 10 log ( 1 | S 21 | 2 ) SE normalR = 10 log ( 1 1 − R ) = 10 log ( 1 1 − | S 11 | 2 ) SE normalA = 10 log ( 1 − R T ) = 10 log ( 1 − | S 11 | 2 …”

“…Figure b–d shows that EMI SE is greater than 10 dB, indicating that multiple-reflection contribution can be ignored. As a result, the total EMI SE is dependent only on SE R and SE A and their values were calculated using eqs , , and . , …”

MXene-PEDOT:PSS Nanocomposite-Based Electromagnetic Interference Shields with Ultrahigh Absolute Shielding Effectiveness

“…Titanium aluminum carbide powder (Ti 3 AlC 2 ) was purchased from Carbon-Ukraine (Kyiv, Ukraine). Lithium fluoride (LiF, 98.5%), hydrochloric acid (HCl, 37%), poly (3,4-ethylene dioxythiophene)-polystyrenesulfonate (PEDOT:PSS) dry-redispersible pellets, and polyethylene terephthalate (PET) substrates were procured from Sigma-Aldrich. Milli-Q water was used as a solvent and also for all cleaning purposes.…”

“…The resulting electromagnetic pollution has also become a health concern, warranting steps to mitigate the potential health risks. The key criteria for selecting a shielding material include excellent electrical conductivity, high mobility, significant dielectric properties, high strength-to-weight ratio, and low fabrication cost using simple technology in order to meet or exceed the regulatory requirements for shielding effectiveness (typically stated in dB at a specified frequency range). , Metals such as steel, nickel, copper, and silver were the earliest candidates for EMI shielding; ,, however, they suffer from heavyweight, corrosion, and cumbersome processes. Other candidates have included conducting polymers and carbon-based materials such as graphene and carbon nanotubes used in their pristine forms and also as a filler in a polymer matrix. − Typically, a high loading of the filler is required to get the desired shielding effectiveness (SE), invariably resulting in very thick films and smaller values for specific shielding effectiveness (SSE).…”

Triple kill: Fabrication of composites coming from waste face masks, polystyrene microplastics, graphene, and their electromagnetic interference shielding behaviors

“…[ 1 ] Thus, to prevent the harm caused by electromagnetic pollution, it is important to develop electromagnetic interference (EMI) shielding materials. [ 2 ] Compared to metallic EMI materials, conducting polymer composites (CPCs) have become a new type of EMI materials with great application prospects because of their good processing performance, light weight, corrosion resistance, low cost, and adjustable EMI shielding effectiveness (EMI SE). [ 3 ] The manufacture of isolated structures can effectively promote electrical performance as well as EMI SE for CPC.…”