Jiang Haojie, Yuan Bin, Guo Hongtao, Pan Fei, Meng Fanmao, Wu Yongpeng, Wang Xiao, Ruan Lingyang, Zheng Shuhuai, Yang Yang, Xiu Zheng, Li Lixin, Wu Changsheng, Gong Yongqing, Yang Menghao, Lu Wei
Shanghai Key Lab. of D&A for Metal Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, China.
School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Nat Commun. 2024 Jul 20;15(1):6138. doi: 10.1038/s41467-024-50541-4.
Integration of functional fillers into liquid metals (LM) induces rheology modification, enabling the free-form shaping of LM at the micrometer scale. However, integrating non-chemically modified low-dimensional materials with LM to form stable and uniform dispersions remain a great challenge. Herein, we propose a solvent-assisted dispersion (SAD) method that utilizes the fragmentation and reintegration of LM in volatile solvents to engulf and disperse fillers. This method successfully integrates MXene uniformly into LM, achieving better internal connectivity than the conventional dry powder mixing (DPM) method. Consequently, the MXene/LM (MLM) coating exhibits high electromagnetic interference (EMI) shielding performance (105 dB at 20 μm, which is 1.6 times that of coatings prepared by DPM). Moreover, the rheological characteristic of MLM render it malleable and facilitates direct printing and adaptation to diverse structures. This study offers a convenient method for assembling LM with low-dimensional materials, paving the way for the development of multifunctional soft devices.
将功能性填料融入液态金属（LM）可引起流变学改性，从而实现微米级液态金属的自由成型。然而，将未经化学改性的低维材料与液态金属整合以形成稳定且均匀的分散体仍然是一个巨大的挑战。在此，我们提出一种溶剂辅助分散（SAD）方法，该方法利用液态金属在挥发性溶剂中的破碎和再整合来包裹和分散填料。该方法成功地将MXene均匀地融入液态金属中，与传统的干粉混合（DPM）方法相比，实现了更好的内部连通性。因此，MXene/液态金属（MLM）涂层表现出高电磁干扰（EMI）屏蔽性能（在20μm时为105dB，是通过DPM制备的涂层的1.6倍）。此外，MLM的流变特性使其具有可塑性，并便于直接打印和适应各种结构。本研究提供了一种将液态金属与低维材料组装的便捷方法，为多功能软器件的开发铺平了道路。
