低维镍铁@碳纳米复合材料的设计合成与电磁波吸收特性  

Designed synthesis of low-dimensional nickel-iron@carbon nanocomposites and electromagnetic wave absorption properties

作　　者：胡文倩 李熙瑞 李媛媛 秦永强[1,3] 张勇 吴玉程[1,3] HU Wenqian;LI Xirui;LI Yuanyuan;QIN Yongqiang;ZHANG Yong;WU Yucheng(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,Anhui,China;Anhui Jincheng Composite Materials Co.,Ltd.,Hefei 231131,Anhui,China;Key Laboratory of Advanced Functional Materials and Devices of Anhui Province,Hefei University of Technology,Hefei 230009,Anhui,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]安徽金诚复合材料有限公司,安徽合肥231131 [3]先进功能材料与器件安徽省重点实验室,安徽合肥230009

出　　处：《金属功能材料》2024年第6期129-136,共8页Metallic Functional Materials

基　　金：安徽省科技重大专项项目:面向新型尖端装备的吸波散热结构功能一体化材料研发及应用(202003a05020007)。

摘　　要：5G通讯的蓬勃发展为生活提供了便利的同时也带来了巨大的电磁污染问题。通常单组分吸波材料难以同时实现出色的阻抗匹配特性和优秀的电磁波吸收能力。因此,开发出兼具二者优势的材料成为一项挑战。采用溶剂热法制备了棒状结构的镍铁金属有机框架,利用聚乙烯吡咯烷酮进行表面功能化处理后生长沸石咪唑框架-8形成双金属有机框架异质结构,高温热解后得到镍铁@碳材料。构筑的异质结构具有较大异质界面,增强界面极化,镍铁合金纳米颗粒催化有机配体形成碳纳米管,提高介电损耗。镍铁@碳材料的最低反射损耗达-71.08dB,匹配厚度为2.06mm,在1.97mm时,最大有效吸收带宽为5.72GHz,实现了电磁波的高效吸收,为今后研究多组分吸波材料提供一定的参考。The booming development of 5Gcommunication has brought great convenience to people's lives,but it also brings huge problems of electromagnetic pollution.It is usually difficult for single-component absorbing materials to achieve excellent impedance matching characteristics and excellent electromagnetic wave absorption ability at the same time,so developing materials that can combine the advantages of both has become a challenge.In this paper,the authors used solvothermal synthesis to prepare rod-shaped nickel-iron metal-organic frameworks,and then functionalized the surfaces with polyvinylpyrrolidone to grow zeolitic imidazolate framework-8to form a bimetallic organic framework heterostructure.After high-temperature thermal decomposition,nickel-iron@carbon materials were obtained.The constructed heterostructure has a large heterojunction interface,enhances interfacial polarization,and nickel-iron alloy nanoparticles catalyze organic ligands to form carbon nanotubes,thereby increasing dielectric loss.The minimum reflection loss of nickel-iron@carbon materials is-71.08dB,the matching thickness is 2.06mm,and the maximum effective absorption bandwidth is 5.72GHz at 1.97mm,achieving efficient electromagnetic wave absorption.This provides a certain reference for future research on multi-component absorbing materials.

关 键 词：低维镍铁 金属有机框架 异质结构 吸波性能 

分 类 号：TB3[一般工业技术—材料科学与工程]