Robust liquid metal reinforced cellulose nanofiber/MXene composite film with Janus structure for electromagnetic interference shielding and electro-/photothermal conversion applications

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外文摘要：MXene-based composite films are regarded as up-and-coming multifunctional electromagnetic interfer-ence(EMI)shielding materials.However,the conflict between strong mechanical properties and high electrical conductivity hinders their application in modern integrated electronics.Herein,in virtue of density-induced sedimentation,robust and multifunctional liquid metals-reinforced cellulose nanofibers(CNF)/MXene(LMs-CNF/MXene)composite films with Janus structure are fabricated by one-step vacuum-assisted filtration method.Not only does the nacre-like structure of the CNF/MXene layer not destroy,but the deposited liquid metals(LMs)layer can serve as conductive potentiation.Due to the special Janus structure,an"absorption-reflection-reabsorption"shielding process is created in LMs-CNF/MXene composite film to strengthen EMI shielding performance.Its shielding effectiveness can reach 51.9 dB at～27 μm,and the reflection coefficient falls to 0.89,below those of reported MXene-based shielding films.Meanwhile,the CNF/MXene layer can endow composite films with excellent mechanical properties with a super tensile strength of 110.3 MPa.Notably,the LMs-CNF/MXene EMI shielding composite films also integrate outstanding photo-/electrothermal conversion performances,which can effectively deice out-doors.The robust LMs-CNF/MXene EMI shielding composite films with satisfying photo-/electrothermal performances have extensive application prospects,such as aerospace,wearable electronics,and portable electronics.

外文关键词：

MXene filmJanus structureMechanical propertiesElectromagnetic interference shieldingElectro-/photothermal conversion

作者：

Hui Zhao、Tong Gao、Jin Yun、Lixin Chen

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作者单位：

Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi'an 710072,China

Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China

School of Chemical Engineering and Clothing,Shaanxi Polytechnic Institute,Xianyang 712000,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaYoung Talent Fund of Association for Science and Technology in Shaanxi ChinaQinchuangyuan Citing Highlevel Innovation and Entrepreneurship Talent ProjectsKey Research and Development Program of Shaanxi Province

项目编号：

522031451220438320230428QCYRCXM-2022-1902021SF-296

出版年：

2024

DOI：

10.1016/j.jmst.2023.12.035

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCD

影响因子：0.657

ISSN：1005-0302

年,卷(期)：2024.191(24)