Hydrophobic, Flexible, and Lightweight MXene Foams for High‐Performance Electromagnetic‐Interference Shielding

• DOI: 10.1002/adma.201702367
• Publication Date: 2017-08-11T10:54:38Z
• Authors: Ji Liu; Hao‐Bin Zhang; Renhui Sun; Yafeng Liu; Zhangshuo Liu; Aiguo Zhou; Zhong‐Zhen Yu
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Ultrathin, lightweight, and flexible electromagnetic‐interference (EMI) shielding materials are urgently required to manage increasingly serious radiation pollution. 2D transition‐metal carbides (MXenes) considered promising alternatives graphene for providing excellent EMI‐shielding performance due their outstanding metallic electrical conductivity. However, the hydrophilicity of MXene films may affect stability reliability when applied in moist or wet environments. Herein, first time, an efficient facile approach is reported fabricate freestanding, flexible, hydrophobic foam with reasonable strength by assembling sheets into followed a hydrazine‐induced foaming process. In striking contrast well‐known hydrophilic materials, foams surprisingly exhibit surfaces water resistance durability. More interestingly, much enhanced effectiveness ≈70 dB achieved lightweight as compared its unfoamed film counterpart (53 dB) highly wave attenuation favorable porous structure. Therefore, hydrophobic, applications aerospace portable wearable smart electronics.