Abstract
Robust,ultra-flexible,and multifunctional MXene-based electromagnetic interference(EMI)shielding nanocomposite films exhibit enormous potential for applications in artificial intelligence,wireless telecommunication,and portable/wearable electronic equip-ment.In this work,a nacre-inspired multifunctional heterocyclic aramid(HA)/MXene@polypyrrole(PPy)(HMP)nanocomposite paper with large-scale,high strength,super toughness,and excellent tolerance to complex conditions is fabricated through the strategy of HA/MXene hydrogel template-assisted in-situ assembly of PPy.Benefiting from the"brick-and-mortar"layered structure and the strong hydrogen-bonding interactions among MXene,HA,and PPy,the paper exhibits remarkable mechanical performances,including high tensile strength(309.7 MPa),outstanding toughness(57.6 MJ m-3),exceptional foldability,and structural stability against ultrasonication.By using the template effect of HA/MXene to guide the assembly of conductive polymers,the synthesized paper obtains excellent electronic conductivity.More importantly,the highly continuous conductive path enables the nanocomposite paper to achieve a splendid EMI shielding effectiveness(EMI SE)of 54.1 dB at an ultra-thin thickness(25.4 μm)and a high specific EMI SE of 17,204.7 dB cm2 g-1.In addition,the papers also have excellent applications in electromagnetic protection,electro-/photothermal de-icing,thermal therapy,and fire safety.These findings broaden the ideas for developing high-performance and multifunctional MXene-based films with enormous application potentialin EMI shielding and thermal management.
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