Abstract
AbstractBy virtue of severe electromagnetic wave pollution in modern society, it is imperative to develop the high-performance devices for effective electromagnetic interference (EMI) shielding. In this work, a novel, effective, light-weight EMI shielding membrane was demonstrated with electrospun polyurethane membranes (EPUM) as substrate. Specifically, the polyurethane (PU) polymer was fabricated into highly stretchable fibrous mats through the technique of electrospinning, and carbon nanotubes (CNTs) were embedded and interconnected onto the surface of PU nanofibers assisted by the high power ultrasonication treatment, endowing the PU nanofibers with a high conductivity. Moreover, Ag nanoparticles (AgNPs) were loaded onto the nanofibers by a chemical reduction process to further improve the conductivity. This as-prepared EPUM/CNTs/AgNPs membrane shows outstanding merits of high stretchability, good conductivity, light weight, and decent EMI shielding effectiveness of ca. 13.9 dB in the frequency range of 8.4–12.4 GHz. Attributed to the above advantages, the developed method and sample promise their high potential in the applications field of wearable electronics for effective EMI shielding.KeywordsElectromagnetic interference shieldingElectrospinningCarbon NanotubesUltrasonication treatmentAg nanoparticles
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