电磁干扰
材料科学
电磁屏蔽
复合数
电磁干扰
复合材料
导电体
自愈水凝胶
光电子学
纳米技术
吸收(声学)
电信
计算机科学
高分子化学
作者
Yunyi Zhu,Ji Liu,Tong Guo,Jing Jing Wang,Xiu‐Zhi Tang,Valeria Nicolosi
出处
期刊:ACS Nano
[American Chemical Society]
日期:2021-01-05
卷期号:15 (1): 1465-1474
被引量:231
标识
DOI:10.1021/acsnano.0c08830
摘要
The fast development of terahertz technologies demands high-performance electromagnetic interference (EMI) shielding materials to create safe electromagnetic environments. Despite tremendous breakthroughs in achieving superb shielding efficiency (SE), conventional shielding materials have high reflectivity and cannot be re-edited or recycled once formed, resulting in detrimental secondary electromagnetic pollution and poor adaptability. Herein, a hydrogel-type shielding material incorporating MXene and poly(acrylic acid) is fabricated through a biomineralization-inspired assembly route. The composite hydrogel exhibits excellent stretchability and recyclability, favorable shape adaptability and adhesiveness, and fast self-healing capability, demonstrating great application flexibility and reliability. More interestingly, the shielding performance of the hydrogel shows absorption-dominated feature due to the combination of the porous structure, moderate conductivity, and internal water-rich environment. High EMI SE of 45.3 dB and broad effective absorption bandwidth (0.2–2.0 THz) with excellent refection loss of 23.2 dB can be simultaneously achieved in an extremely thin hydrogel (0.13 mm). Furthermore, such hydrogel demonstrates sensitive deformation responses and can be used as an on-skin sensor. This work provides not only an alternative strategy for designing next-generation EMI shielding material but also a highly efficient and convenient method for fabricating MXene composite on macroscopic scales.
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