Lightweight Dual‑Functional Segregated Nanocomposite Foams for Integrated Infrared Stealth and Absorption‑Dominant Electromagnetic Interference Shielding  

作　　者：Zhonglei Ma Ruochu Jiang Jiayao Jing Songlei Kang Li Ma Kefan Zhang Junxian Li Yu Zhang Jianbin Qin Shuhuan Yun Guangcheng Zhang 

机构地区：[1]MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions,Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710072,People’s Republic of China [2]College of Chemistry and Chemical Engineering,Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry,Ministry of Education,Shaanxi University of Science and Technology,Xi’an 710072,People’s Republic of China [3]Department of Mechanical and Industrial Engineering,University of Toronto,5 King’s College Road,Toronto,ON M5S 3G8,Canada [4]Chongqing Innovation Center,Northwestern Polytechnical University,Chongqing 401135,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第11期38-55,共18页纳微快报（英文版）

基　　金：the National Natural Science Foundation of China (52273083, 51903145);Key Research and Development Project of Shaanxi Province (2023-YBGY-476);Natural Science Foundation of Chongqing,China (CSTB2023NSCQ-MSX0691);National College Students Innovation and Entrepreneurship Training Program (202310699172)

摘　　要：Lightweight infrared stealth and absorption-dominant electromagnetic interference(EMI)shielding materials are highly desirable in areas of aerospace,weapons,military and wearable electronics.Herein,lightweight and high-efficiency dual-functional segregated nanocomposite foams with microcellular structures are developed for integrated infrared stealth and absorption-dominant EMI shielding via the efficient and scalable supercritical CO_(2)(SC-CO_(2))foaming combined with hydrogen bonding assembly and compression molding strategy.The obtained lightweight segregated nanocomposite foams exhibit superior infrared stealth performances benefitting from the synergistic effect of highly effective thermal insulation and low infrared emissivity,and outstanding absorption-dominant EMI shielding performances attributed to the synchronous construction of microcellular structures and segregated structures.Particularly,the segregated nanocomposite foams present a large radiation temperature reduction of 70.2℃ at the object temperature of 100℃,and a significantly improved EM wave absorptivity/reflectivity(A/R)ratio of 2.15 at an ultralow Ti_(3)C_(2)T_(x) content of 1.7 vol%.Moreover,the segregated nanocomposite foams exhibit outstanding working reliability and stability upon dynamic compression cycles.The results demonstrate that the lightweight and high-efficiency dual-functional segregated nanocomposite foams have excellent potentials for infrared stealth and absorption-dominant EMI shielding applications in aerospace,weapons,military and wearable electronics.

关 键 词：Segregated nanocomposite foams Microcellular structures Infrared stealth EMI shielding Low infrared emissivity 

分 类 号：TB34[一般工业技术—材料科学与工程]