Multi-interface structure design of bamboo-based carbon/Co/CoO composite electromagnetic wave absorber based on biomimetic honeycomb-shaped superstructure  

作　　者：Yanting Wang He Han Huiyang Bian Yanjun Li Zhichao Lou 

机构地区：[1]Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China [2]College of Light Industry and Food Engineering,Nanjing Forestry University,Nanjing 210037,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第3期631-644,共14页矿物冶金与材料学报(英文版)

基　　金：supported by the National Key R&D Program of China(Nos.2023YFE0108300 and 2023YFD2202103);the National Natural Science Foundation of China(No.32371972);the Natural Science Foundation of Jiangsu Province,China(No.BK20221336);Jiangsu Agricultural Science and Technology Independent Innovation Fund,China(No.CX(23)3060);Jiangxi Forestry Bureau Forestry Science and Technology Innovation Special Project,China(No.202240).

摘　　要：The rapid development of 5G communication technology and smart electronic and electrical equipment will inevitably lead to electromagnetic radiation pollution.Enriching heterointerface polarization relaxation through nanostructure design and interface modifica-tion has proven to be an effective strategy to obtain efficient electromagnetic wave absorption.Here,this work implements an innovative method that combines biomimetic honeycomb superstructure to constrain hierarchical porous heterostructure composed of Co/CoO nano-particles to improve the interfacial polarization intensity.The method effectively controlled the absorption efficiency of Co^(2+)through de-lignification modification of bamboo,and combined with the bionic carbon-based natural hierarchical porous structure to achieve uniform dispersion of nanoparticles,which is conducive to the in-depth construction of heterogeneous interfaces.In addition,the multiphase struc-ture brought about by high-temperature pyrolysis provides the best dielectric loss and impedance matching for the material.Therefore,the obtained bamboo-based Co/CoO multiphase composite showed excellent electromagnetic wave absorption performance,achieving excel-lent reflection loss(RL)of-79 dB and effective absorption band width of 4.12 GHz(6.84-10.96 GHz)at low load of 15wt%.Among them,the material’s optimal radar cross-section(RCS)reduction value can reach 31.9 dB·m^(2).This work provides a new approach to the micro-control and comprehensive optimization of macro-design of microwave absorbers,and offers new ideas for the high-value utiliza-tion of biomass materials.

关 键 词：biomass honeycomb porous heterojunction structure interfacial polarization electromagnetic wave absorption 

分 类 号：TB34[一般工业技术—材料科学与工程]