Lightweight Dual-Functional Segregated Nanocomposite Foams for Integrated Infrared Stealth and Absorption-Dominant Electromagnetic Interference ShieldingOACSTPCDEI
Lightweight Dual-Functional Segregated Nanocomposite Foams for Integrated Infrared Stealth and Absorption-Dominant Electromagnetic Interference Shielding
Lightweight infrared stealth and absorption-dominant elec-tromagnetic interference(EMI)shielding materials are highly desirable in areas of aerospace,weapons,military and wearable electronics.Herein,light-weight 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 supercriti-cal CO2(SC-CO2)foaming combined with hydrogen bonding assembly and compression molding strategy.The obtained lightweight segregated nano-composite foams exhibit superior infrared stealth performances benefitting from the synergistic effect of highly effective thermalinsulation 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 nano-composite 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 Ti3C2Tx 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 forinfrared stealth and absorption-dominant EMI shielding applications in aerospace,weapons,military and wearable electronics.
Zhonglei Ma;Shuhuan Yun;Guangcheng Zhang;Ruochu Jiang;Jiayao Jing;Songlei Kang;Li Ma;Kefan Zhang;Junxian Li;Yu Zhang;Jianbin Qin
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||Chongqing Innovation Center,Northwestern Polytechnical University,Chongqing 401135,People's Republic of ChinaMOE 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 ChinaCollege 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 ChinaDepartment of Mechanical and Industrial Engineering,University of Toronto,5 King's College Road,Toronto,ON M5S 3G8,Canada
Segregated nanocomposite foamsMicrocellular structuresInfrared stealthEMI shieldingLow infrared emissivity
《纳微快报（英文）》 2024 (011)
38-55 / 18
The authors gratefully acknowledge 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)and National College Students Innovation and Entrepreneurship Training Pro-gram(202310699172).
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