3D printing of resilient, lightweight and conductive MXene/reduced graphene oxide architectures for broadband electromagnetic interference shielding

Abstract

Lightweight and conductive macroscopic MXene-based architectures receive tremendous attention for various potential applications. However, conventional methods are incapable of producing customized structures with controllable functionality and performances. Herein, we demonstrate...

Recent advances in 3D printed structures for electromagnetic wave absorbing and shielding

“…Dai et al employed DIW 3D printing techniques to construct lightweight, resilient, and conductive MXene-based scaffolds, which delivered an excellent electrical conductivity of 1013 S m À1 and a broadband tunable shielding efficiency of above 60 dB. 165 Wang and co-workers prepared highly stretchable and conductive graphene/polydimethylsiloxane lattices by DIW 3D printing. 119 The printed structure exhibited an excellent stretchability of 130% along with a tunable EMI shielding effectiveness (SE) of 45 dB.…”

Flexible Sandwich-Structured Silicone Rubber/MXene/Fe3O4 Composites for Tunable Electromagnetic Interference Shielding

“…With the advent of 5G, miniaturized, portable, and multifunctional communication electronic devices have developed rapidly. However, smartphones with high-frequency, high-speed communication generate a lot of electromagnetic radiation during operation, which impacts the normal operation of adjacent components and devices. − It also damages human health. − To address these problems, conductive polymer composites have been used for electromagnetic interference (EMI) shielding in next-generation communication electronic devices due to their corrosion resistance, low mass, and ease of processing. − Enhancing the electrical conductivity of conductive polymer composites is one of the main strategies used to improve the EMI shielding effectiveness (EMI SE) in the current study. − Constructing a 3D conductive network in the polymer matrix can both ensure the excellent conductivity of the composite material and reduce the amount of filler. − However, high conductivity can cause severe impedance mismatch between the incident electromagnetic wave and the shielding material, resulting in increased electromagnetic wave reflection. − When researchers raised the content of multilayered carbon nanotubes (MWCNTs) in the waterborne polyurethane (WPU)/MWCNTs composite to 72.6 wt %, the surface conductivity of the composite reached 2100 S/m, and the reflection coefficient (R) became as high as 0.97, although EMI SE was also up to 62 dB in the X-band . In a practical device, this 97% electromagnetic wave reflection would cause serious secondary pollution and complicate the electromagnetic environment.…”

Reduced graphene oxide layers full of bubbles for electromagnetic interference shielding

“…Dai et al developed a 3D printing approach to fabricate lightweight 3D MXene scaffolds with a high EMI shielding performance. 23 The controllable hierarchical structures formed a dense conductive network that could attenuate electromagnetic waves. Lai et al prepared a versatile RGO-PAA/CS/ACC hydrogel and its SE T was dramatically increased because of the conductive network formed by the introduced rGO nanosheets.…”