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Direct Ink Writing of Highly Conductive MXene Frames for Tunable Electromagnetic Interference Shielding and Electromagnetic Wave-Induced Thermochromism
Nano-Micro Letters ( IF 26.6 ) Pub Date : 2021-06-22 , DOI: 10.1007/s40820-021-00665-9
Xinyu Wu 1, 2 , Tingxiang Tu 1 , Yang Dai 1 , Pingping Tang 1 , Yu Zhang 1 , Zhiming Deng 2 , Lulu Li 2 , Hao-Bin Zhang 1, 2 , Zhong-Zhen Yu 2, 3
Affiliation  

Highlights

  • 3D printing of MXene frames with tunable electromagnetic interference shielding efficiency is demonstrated.

  • Highly conductive MXene frames are reinforced by cross-linking with aluminum ions.

  • Electromagnetic wave is visualized by electromagnetic-thermochromic MXene patterns.

Abstract

The highly integrated and miniaturized next-generation electronic products call for high-performance electromagnetic interference (EMI) shielding materials to assure the normal operation of their closely assembled components. However, the most current techniques are not adequate for the fabrication of shielding materials with programmable structure and controllable shielding efficiency. Herein, we demonstrate the direct ink writing of robust and highly conductive Ti3C2Tx MXene frames with customizable structures by using MXene/AlOOH inks for tunable EMI shielding and electromagnetic wave-induced thermochromism applications. The as-printed frames are reinforced by immersing in AlCl3/HCl solution to remove the electrically insulating AlOOH nanoparticles, as well as cross-link the MXene sheets and fuse the filament interfaces with aluminum ions. After freeze-drying, the resultant robust and porous MXene frames exhibit tunable EMI shielding efficiencies in the range of 25–80 dB with the highest electrical conductivity of 5323 S m−1. Furthermore, an electromagnetic wave-induced thermochromic MXene pattern is assembled by coating and curing with thermochromic polydimethylsiloxane on a printed MXene pattern, and its color can be changed from blue to red under the high-intensity electromagnetic irradiation. This work demonstrates a direct ink printing of customizable EMI frames and patterns for tuning EMI shielding efficiency and visualizing electromagnetic waves.



中文翻译:

用于可调谐电磁干扰屏蔽和电磁波诱导热致变色的高导电 MXene 框架的直接墨水书写

强调

  • 演示了具有可调电磁干扰屏蔽效率的 MXene 框架的 3D 打印。

  • 高导电性 MXene 框架通过与铝离子的交联得到加强。

  • 电磁波通过电磁热致变色 MXene 图案可视化。

抽象的

高度集成化和小型化的下一代电子产品需要高性能的电磁干扰(EMI)屏蔽材料来保证其紧密组装的组件的正常运行。然而,目前的技术不足以制备具有可编程结构和可控屏蔽效率的屏蔽材料。在此,我们展示了通过使用 MXene/AlOOH 墨水直接墨水书写具有可定制结构的坚固且高导电的 Ti 3 C 2 T x MXene 框架,用于可调 EMI 屏蔽和电磁波诱导的热致变色应用。印刷框架通过浸入 AlCl 3中进行加固/HCl 溶液去除电绝缘的 AlOOH 纳米颗粒,以及交联 MXene 片材并将灯丝界面与铝离子融合。冷冻干燥后,所得坚固且多孔的 MXene 框架在 25-80 dB 范围内表现出可调的 EMI 屏蔽效率,最高电导率为 5323 S m -1。此外,通过在印刷的 MXene 图案上涂覆和固化热致变色聚二甲基硅氧烷,组装出电磁波诱导的热致变色 MXene 图案,在高强度电磁辐射下其颜色可以从蓝色变为红色。这项工作展示了可定制的 EMI 框架和图案的直接墨水打印,用于调整 EMI 屏蔽效率和可视化电磁波。

更新日期:2021-06-22
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