材料科学
电磁屏蔽
电磁干扰
复合材料
聚二甲基硅氧烷
MXenes公司
渗流阈值
电磁干扰
红外线的
光电子学
纳米技术
电阻率和电导率
电子工程
光学
电气工程
物理
工程类
作者
Zijie Xu,Xin Ding,Shikuo Li,Fangzhi Huang,Yan Wang,Shipeng Wang,Xian Zhang,Fenghua Liu,Hui Zhang
标识
DOI:10.1021/acsami.2c05544
摘要
To effectively avoid the drawbacks of conventional metal-based electromagnetic interference (EMI) shielding materials such as high density and susceptibility to corrosion, a multifunctional melamine foam (MF) consisting of MXene/polydimethylsiloxane (PDMS) layers with ultralow percolation thresholds was designed through the electrostatic self-assembly and impregnation strategies. The prepared lightweight foams simultaneously show multifunctional properties including EMI shielding, infrared (IR) stealth, oxidation-resistance, and compression stability. Typically, this multifunctional foam exhibits an excellent EMI shielding efficiency (EMI SE) of 45.2 dB at X-band (8.2-12.4 GHz) with only 1.131 vol % MXene filler. Moreover, the temperature difference between the upper and lower surfaces of the foam can be maintained at 45 °C due to its unique three-dimensional (3D) porous structure and low infrared emissivity. The MF skeleton with MXene/PDMS (MFMXP) displays high hydrophobicity, which remains stable in EMI SE after 60 days of exposure to air. Additionally, it shows outstanding mechanical stability after 100 cycles of compression experiments. The lightweight stealth nanocomposite foams can operate stably in complex environments and show high potential for applications in high-tech fields such as wearable electronics, the military, and semiconductors, etc.
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