Urethane bonding induced crosslinking of MXene frameworks for electrically and mechanically robust EMI shielding films
발표자
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초록
내용
MXenes are a family of 2D transition metal carbides and/or nitrides with high electrical conductivity, large surface area and solution processability. which have been utilized in various applications. Despite these merits, the limited mechanical properties of MXene films restrict further practical applications, where polymer nanocomposites have been studied to compensate this issue. In this study, inspired by the mechanically robust polymer network structures, adjacent MXene sheets were cross-linked by urethane bonds. The existence of dense functional groups on the MXene surface allows the surface modifications of active sites where covalent bonds were formed between the hydroxyl groups of MXene and diisocyanates. Compared to conventional hybrids, our urethane-crosslinked MXene frameworks show increased mechanical properties and environmental stability while largely retaining the high electrical conductivity and outstanding EMI shielding performance, even under oxidative environments.