Abstract
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.
基金项目
National Natural Science Foundation of China(52203145)
National Natural Science Foundation of China(12204383)
Young Talent Fund of Association for Science and Technology in Shaanxi China(20230428)
Qinchuangyuan Citing Highlevel Innovation and Entrepreneurship Talent Projects(QCYRCXM-2022-190)
Key Research and Development Program of Shaanxi Province(2021SF-296)
NETL
NSTL
万方数据