Flexible Ti_(3)C_(2)T_(x)/(Aramid Nanofiber/PVA)Composite Films for Superior Eectromagnetic Interference Shielding

作     者：Yali Zhang Zhonglei Ma Kunpeng Ruan Junwei Gu Yali Zhang;Zhonglei Ma;Kunpeng Ruan;Junwei Gu

作者机构：Shanxi Key Laboratory of Macromolecular Science and TefhnologySchool of Chemistry and Chemical EngineringNorthwestern Polytechmical UniversityXi'anShaanxi 710072China 

出 版 物：《Research》 (研究（英文）)

年 卷 期：2022年第2022卷第2期

页      面：213-224页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：support and funding from the Foundation of National Natural Science Foundation of China(51903145 and 51973173) Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province of China(2019jC-11) and Fundamental Research Funds for the Central Universities(D5000210627) Y.L.Zhang would like to thank the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2021107) This work is also financially supported by the Polymer Electromagnetic Functional Materials Innovation Team of Shaanxi Sanqin Scholars 

主　　题：composite directional film 

摘      要：Multifunctional electromagnetic interference(EMI)shielding materials would solve electromagnetic radiation and pollution problemsfrom ***,the directionalfreezedryingtechnology isutilizedtoprepare the aramid nanofber/polyvinyl alcohol aerogel with a directionally porous structure(D-ANF/PVA),and the Ti_(3)C_(2)T_(x)dispersion is fully immersed into the D-ANF/PVA aerogel via ultrasonication and vacuum-assisted ***_(3)C_(2)T_(x)/(ANF/PVA)EMI shielding composite films with directionally ordered structure(D-Ti_(3)C_(2)T_(x)/(ANF/PVA)are then prepared by freeze-drying and hot *** directionally porous structure enables the highly conductive TiCnanosheets to be wrapped on the directionally porous D-ANF/PVA framework in order arrangement and overlapped with each *** the hot pressing process effectively reduces the layer spacing between the stacked wavy D-ANF/PVA,to form a large number of TiCT T_(3)C_(2)T_(x)continuous conductive paths,which significantly improves the conductivity of the D-Ti_(3)C_(2)T_(x)/(ANF/PVA)EMI shielding composite film,When the amount of Ti_(3)C_(2)T_(x)is 80 wt%,the EMI shielding efectiveness(EMil SE)and specifc SE(SSE/t)of D-Ti_(3)C_(2)T_(x)/(ANF/PVA)EMI shielding composite film achieve 70 dB and 13790 dB-cmg(thickness and density of 120μm and 0.423g·cm^(-3))。far superior to random-structured T_(3)C_(2)T_(x)/(ANF/PVA)(R-TJCTM(ANF/PVA))composite film(46 dB and 9062 dBcm·g^(-3),respectively)via blending-freeze-drying followed by hot pressing ***,the D-TiCTJMANF/PVA)EMII shielding composite flm possesses excellent flexibility and foldability.