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Flexible,breathable,and reinforced ultra-thin Cu/PLLA porous-fibrous membranes for thermal management and electromagnetic interference shielding

查看全文 作　　者：Jinlin [1]Chang;Chen [1]Meng;Bowen [1]Shi;Wenyuan [1]Wei;Renzhi [1]Li;Jinmin [1]Meng;Haobin [2]Wen;Xiangyu [3]Wang;Jun [4]Song;Zhirun [5]Hu;Zekun [1,6]Liu;Jiashen [1]Li 高影响力作者 机构地区：[1]Department of Materials,The University of Manchester,Manchester M139PL,UK;[2]School of Mechanical,Aerospace and Civil Engineering,The University of Manchester,Manchester M139PL,UK;[3]Department of Chemistry,The University of Manchester,Manchester M139PL,UK;[4]Materdicine Lab,School of Life Sciences,Shanghai University,Shanghai 200444,China;[5]Department of Electrical and Electronic Engineering,The University of Manchester,Manchester M139PL,UK;[6]Botnar Research Center,University of Oxford,Old Road,Headington,Oxford OX37LD,UK高影响力机构 出　　处：《Journal of Materials Science & Technology》索引2023年第30期,共11页高影响力期刊 基　　金：We acknowledge the support of the Electron Microscopy Centre at The University of Manchester. 摘　　要：Electromagnetic interference shielding and thermal management by wearable devices show great po-tential in emerging digital healthcare.Conventional metal films implementing the functions must sacri-fice either flexibility or permeability,which is far from optimal in practical applications.In this work,an ultra-thin(15μm),flexible,and porous Cu/PLLA fibrous membrane is developed by depositing cop-per particles on the polymer substrate.With novel acetone&heat treatment procedure,the mem-brane is considerably stronger while maintaining the porous fibre structure.Its fantastic breathabil-ity and super high electrical conductivity(9471.8130 S/cm)enable the composites to have fast electri-cal heating characteristics and excellent thermal conductivity for effective thermal management.Mean-while,the porous polymer substrate structure greatly enhances the diffusion of conductive substances and increases the electromagnetic interference shielding effectiveness of the membranes(7797.98 dB cm^(2)/g at the H band and 8072.73 dB cm^(2)/g at the Ku band respectively).The composites present high flexibility,breathability,and strength with the functions of thermal management and electromag-netic shielding,showing great potential for future portable electronic devices and wearable integrated garments. 关 键 词：Electromagnetic interference shielding EFFECTIVENESS Thermal management Thin films Metal-matrix composites
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