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Ultra-thin robust CNT@GC film integrating effective electromagnetic shielding and flexible Joule heating

查看全文 作　　者：Ding [1]Zhang;Chunhui [2]Wang;Meng [1,3]Li;Weixue [1]Meng;Shipeng [1]Zhang;Mengdan [1]Yang;Xinguang [1]Huang;Yingjiu [1]Zhang;Yuanyuan [1]Shang;Anyuan [3]Cao 高影响力作者 机构地区：[1]Key Laboratory of Materials Physics(Ministry of Education),School of Physics and Microelectronics,Zhengzhou University,Zhengzhou,450052,China;[2]Electron Microscopy Center,Yunnan University,Kunming,650091,China;[3]School of Materials Science and Engineering,Peking University,Beijing,100871,China高影响力机构 出　　处：《Nano Research》索引2024年第17卷第5期,共10页高影响力期刊 基　　金：supported by the National Key Research and Development Program of China(No.2020YFA0210702);the National Natural Science Foundation of China(No.51872267);the Natural Science Foundation of Henan Province,China(No.202300410371);Program for Science&Technology Innovation Talents in Universities of Henan Province(No.21HASTIT017). 摘　　要：The demand for lightweight,thin electromagnetic interference(EMI)shielding film materials with high shielding effectiveness(SE),excellent mechanical properties,and stability in complex environments is particularly pronounced in the realm of flexible and portable electronic products.Here,we developed an ultra-thin film(CNT@GC)in which the glassy carbon(GC)layer wrapped around and welded carbon nanotubes(CNTs)to form a core-shell network structure,leading to exceptional tensile strength(327.2 MPa)and electrical conductivity(2.87×10^(5) S·m^(−1)).The CNT@GC film achieved EMI SE of 60 dB at a thickness of 2µm after post-acid treatment and high specific SE of 3.49×10^(5) dB·cm^(2)·g^(−1),with comprehensive properties surpassing those of the majority of previous shielding materials.Additionally,the CNT@GC film exhibited Joule heating capability,reaching a surface temperature of 135℃at 3 V with a fast thermal response of about 0.5 s,enabling anti-icing/de-icing functionality.This work presented a methodology for constructing a robust CNT@GC film with high EMI shielding performance and exceptional Joule heating capability,demonstrating immense potential in wearable devices,defense,and aerospace applications. 关 键 词：core-shell structure ultra-thin lightweight film robust film electromagnetic shielding Joule heating
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