Liquid metal (LM) has become an emerging material paradigm in the electro-magnetic interference shielding field owing to its excellent electrical conductivity.However,the processing of lightweight bulk LM compos-ites with finite package without leakage is still a great challenge,due to high surface tension and pump-out issues of LM.Here,a novel confined thermal expansion strategy based on expandable microsphere (EM) is proposed to develop a new class of LM-based monoliths with 3D continu-ous conductive network.The EM/LM monolith(EM/LMm) presents outstanding performance of lightweight like metallic aerogel (0.104 g cm-1),high strength (3.43 MPa),super elasticity (90％ strain),as well as excellent tailor ability and recyclability,rely on its unique gas-filled closed-cellular structure and refined LM network.Moreover,the assembled highly conducting EM/LMm exhibits a recorded shielding effectiveness (98.7 dB) over a broad frequency range of 8.2-40 GHz among reported LM-based composites at an ultra-low content of LM,and demonstrates excellent electromagnetic sealing capacity in practical electronics.The ternary EM/LM/Ni monoliths fabricated by the same approach could be promising universal design principles for multifunctional LM composites,and applicable in magnetic responsive actuator.

Yadong Xu;Zhiqiang Lin;Krishnamoorthy Rajavel;Tao Zhao;Pengli Zhu;Yougen Hu;Rong Sun;Ching-Ping Wong

Shenzhen Institute of Advanced Electronic Materials,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,People's Republic of China;School of Materials Science and Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA

纳微快报（英文）

[1]Yadong Xu;Zhiqiang Lin;Krishnamoorthy Rajavel;Tao Zhao;Pengli Zhu;Yougen Hu;Rong Sun;Ching-Ping Wong-.Tailorable,Lightweight and Superelastic Liquid Metal Monoliths for Multifunctional Electromagnetic Interference Shielding)[J].纳微快报（英文）,2022(02):136-150

Tailorable,Superelastic,Monoliths,LMm

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