仿生构筑超薄MXene/CNC电磁屏蔽复合薄膜  

Bioinspired Ultrathin MXene/CNC Composite Film for Electromagnetic Interference Shielding

作　　者：刘张硕 刘骥 戴洋 李晓锋 于中振[1] 张好斌[1] LIU Zhang-Shuo;LIU Ji;DAI Yang;LI Xiao-Feng;YU Zhong-Zhen;ZHANG Hao-Bin(College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029)

机构地区：[1]北京化工大学材料科学与工程学院

出　　处：《无机材料学报》2020年第1期99-104,共6页Journal of Inorganic Materials

基　　金：国家自然科学基金项目(51673015,51373011,51533001);中央高校基本业务费项目(BHYC1707B)~~

摘　　要：高强电磁屏蔽薄膜材料在柔性器件、汽车电子和航空航天等领域具有广泛应用前景,受珍珠母微纳米结构及其优异机械性能的启发,利用简单的溶液共混及真空抽滤方法,将纤维素纳米晶(CNC)和MXene混合,经层层组装制备了高性能MXene基复合薄膜。结果表明:薄膜的机械性能有了显著提高,拉伸强度从18 MPa提高到57 MPa,韧性从70 kJ/m^3提高到313 kJ/m^3,同时保留了复合薄膜的高电导率(104 S/m)和优异的电磁屏蔽性能,厚度8μm时可达40 dB以上。Electromagnetic interference(EMI)shielding films with excellent mechanical properties are highly promising for applications in flexible devices,automotive electronics and aerospace.Inspired by the excellent mechanical properties of nacre derived from its micro/nanoscale structure,high-performance MXene/Cellulose nanocrystals(CNC)composite films were prepared by simple solution blending and followed vacuum-assisted filtration process.The presence of CNC significantly improves the mechanical properties with tensile strength increasing from 18 MPa to 57 MPa and toughness improving from 70 kJ/m^3 to 313 kJ/m^3.Meanwhile,the composite film still exhibits high electrical conductivity(up to 104 S/m)and excellent EMI shielding efficiency(over 40 dB)with a small thickness of 8μm.

关 键 词：MXene 力学性能 电磁屏蔽 

分 类 号：TB321[一般工业技术—材料科学与工程]