Multifunctional Janus-Structured Polytetrafluoroethylene-Carbon Nanotube-Fe_(3)O_(4)/MXene Membranes for Enhanced EMI Shielding and Thermal Management  

作　　者：Runze Shao Guilong Wang Jialong Chai Jun Lin Guoqun Zhao Zhihui Zeng Guizhen Wang 

机构地区：[1]Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education),Shandong University,Jinan 250061,People’s Republic of China [2]Center for Advanced Studies in Precision Instruments,Hainan University,Haikou 570228,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第6期242-263,共22页纳微快报(英文版)

基　　金：support from the National Natural Science Foundation of China(NSFC,Grant No.52175341);Shandong Provincial Natural Science Foundation(Grant No.ZR2022JQ24);Funding Project of Jinan City’s New Twenty Items for Colleges and Universities(Grant No.202333038).

摘　　要：Herein,a novel Janus-structured multifunctional membrane with integrated electromagnetic interference(EMI)shielding and personalized thermal management is fabricated using shear-induced in situ fibrillation and vacuum-assisted filtration.Interestingly,within the polytetrafluoroethylene(PTFE)-carbon nanotube(CNT)-Fe_(3)O_(4)layer(FCFe),CNT nanofibers interweave with PTFE fibers to form a stable“silk-like”structure that effectively captures Fe_(3)O_(4)particles.By incorporating a highly conductive MXene layer,the FCFe/MXene(FCFe/M)membrane exhibits excellent electrical/thermal conductivity,mechanical properties,and flame retardancy.Impressively,benefiting from the rational regulation of component proportions and the design of a Janus structure,the FCFe/M membrane with a thickness of only 84.9μm delivers outstanding EMI shielding effectiveness of 44.56 dB in the X-band,with a normalized specific SE reaching 10,421.3 dB cm^(2)g^(-1),which is attributed to the“absorption-reflection-reabsorption”mechanism.Furthermore,the membrane demonstrates low-voltage-driven Joule heating and fast-response photothermal performance.Under the stimulation of a 3 V voltage and an optical power density of 320 mW cm^(-2),the surface temperatures of the FCFe/M membranes can reach up to 140.4 and 145.7℃,respectively.In brief,the FCFe/M membrane with anti-electromagnetic radiation and temperature regulation is an attractive candidate for the next generation of wearable electronics,EMI compatibility,visual heating,thermotherapy,and military and aerospace applications.

关 键 词：MXene Polytetrafluoroethylene Fe_(3)O_(4) Janus-structured EMI shielding Thermal management MULTIFUNCTIONAL 

分 类 号：TB3[一般工业技术—材料科学与工程]