Controllable heterogeneous interfaces and dielectric modulation of biomass-derived nanosheet metal-sulfide complexes for high-performance electromagnetic wave absorption  

作　　者：Zehua Zhou Di Lan Junwen Ren Yuhang Cheng Zirui Jia Guanglei Wu Pengfei Yin 

机构地区：[1]College of Science,Sichuan Agricultural University,Ya’an 625014,China [2]School of Materials Science and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China [3]Institute of Materials for Energy and Environment,State Key Laboratory of Bio-fibers and Eco-textiles,College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China [4]College of Electrical Engineering,Sichuan University,Chengdu 610065,China

出　　处：《Journal of Materials Science & Technology》2024年第18期165-173,共9页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52377026 and 52301192);Natural Science Foundation of Shandong Province(Nos.ZR2019YQ24 and ZR2020QF084);Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057);the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites);Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams).

摘　　要：Constructing new environmentally friendly dielectric coupling models is an effective strategy for design-ing high-performance wave absorbers.However,biomass carbon materials with high potential energy and a lack of magnetic response mechanism do not fulfill the requirements.In this work,the effects of different pyrolysis temperatures and the introduction of different metal sulfides on the microscopic morphology and dielectric-magnetic properties of the composites were investigated.Among them,K el-ement detected in the biomass effectively modulates the conduction loss.The minimum reflection loss(RL_(min))of-62.42 dB at 1.8 mm and the maximum effective absorption bandwidth(EAB_(max))of-62.42 dB at 1.9 mm were obtained due to the non-uniform interfacial-induced polarization of the metal-sulfide nanosheets and the scattering of the electromagnetic waves(EW)by the“island”microstructures.This study provides a powerful reference for the modification and application of biomass materials.

关 键 词：Biomass materials Metal sulfide Electromagnetic wave absorption Oxygen vacancy Interfacial polarization 

分 类 号：TB383.1[一般工业技术—材料科学与工程]