钴酸镍/亲水碳布微波吸收复合材料及其热裂解特性研究  

Research on Nickel Cobalt Oxide/Hydrophilic Carbon Cloth Microwave Absorption Composites and Their Thermal Cracking Characteristics

作　　者：田恐虎 杨航 高凯鹏 疏瑞文 王静[1,2] TIAN Konghu;YANG Hang;GAO Kaipeng;SHU Ruiwen;WANG Jing(School of Materials Science and Engineering/The First Affiliated Hospital(Huainan First People's Hospital)/School of Chemical and Blasting Engineering/Analysis and Test Center,Anhui University of Science and Technology,Huainan 232001,China;Pinghu Institute of Advanced Materials,Zhejiang University of Technology,Pinghu 314200,China)

机构地区：[1]安徽理工大学材料科学与工程学院/第一附属医院(淮南市第一人民医院)/化工与爆破学院/分析测试中心,安徽淮南232001 [2]浙江工业大学平湖新材料研究院,浙江平湖314200

出　　处：《材料研究与应用》2025年第1期91-97,共7页Materials Research and Application

基　　金：安徽省高校省级质量工程项目(2023jyxm0307);安徽省高校重点科研项目(2022AH050813);安徽理工大学医学专项培育项目(YZ2023H2A002)。

摘　　要：随着智能电子设备的普及,电磁辐射污染问题愈发严峻,开发新型高性能微波吸收材料已成为当下新材料领域的一大研究热点。由于微波吸收材料的吸波性能在高温条件下会出现不同程度的衰减,因此,针对高温环境下微波吸收材料的吸波性能变化及热裂解特性展开研究。采用简易水热法与高温煅烧相结合的工艺,将钴酸镍(Nickel cobalt oxide,NiCo_(2)O_(4))成功负载于亲水碳布(Hydrophilic carbon cloth,HCC),获得具有优异热稳定性和微波吸收性能的NiCo_(2)O_(4)/HCC复合材料。通过SEM、XRD和XPS对NiCo_(2)O_(4)/HCC复合材料进行了微观结构与材料成分分析,通过VNA和TGA-IR对NiCo_(2)O_(4)/HCC复合材料进行了吸波性能和热裂解特性测试。结果表明,针状NiCo_(2)O_(4)均匀地负载于HCC表面,这为NiCo_(2)O_(4)/HCC复合材料引入了磁损耗。与纯HCC基体相比,针状NiCo_(2)O_(4)与HCC形成的异质界面结构使NiCo_(2)O_(4)/HCC复合材料的微波吸收能力得到显著提升。XRD和XPS分析结果表明,NiCo_(2)O_(4)/HCC复合材料中的NiCo_(2)O_(4)为尖晶石结构。当填充的NiCo_(2)O_(4)质量分数为25%及厚度为4.98 mm时,NiCo_(2)O_(4)/HCC复合材料的反射损耗(RL)高达-50.00 dB。TGA-IR分析结果表明,NiCo_(2)O_(4)/HCC复合材料在25—800℃范围的质量损失率主要源于HCC上功能基团和NiCo_(2)O_(4)的分解。经25—800℃的高温热裂解后,NiCo_(2)O_(4)/HCC复合材料的RL为-48.67 dB,较热裂解前的RL强度损失率小于5%,表明该复合材料在高温环境下依然保持着良好的微波吸收性能。制备的NiCo_(2)O_(4)/HCC复合材料有望成为高温微波吸收材料的潜在选择之一,为指导该材料在高温场景中的实际应用提供一定的理论支撑。With the increasing popularity of smart electronic devices,the problem of electromagnetic radiation pollution caused by them is becoming increasingly severe.Developing new high-performance microwave absorbing materials has become one of the research hotspots in the field of new materials.One of the critical issues in the application of microwave absorbing materials is that their absorption performance often decreases to varying degrees at high-temperature.Therefore,research on the changes in microwave absorbing performance and thermal cracking characteristics of microwave absorbing materials under high-temperature environment can provide a theoretical basis for guiding their practical applications in high-temperature environment.In this paper,nickel cobalt oxide(NiCo_(2)O_(4))was successfully loaded onto hydrophilic carbon cloth(HCC)by combining a facile hydrothermal method with high-temperature calcination,which fully utilizing the advantages of both components to obtain NiCo_(2)O_(4)/HCC composites with excellent thermal stability and microwave absorption properties.The SEM,XRD,and XPS were used to analyze the microstructure and material composition of NiCo_(2)O_(4)/HCC composites.The VNA and TGA-IR were used to test the microwave absorbing performance and thermal cracking characteristics of NiCo_(2)O_(4)/HCC composites.The results indicate that needle-shaped NiCo_(2)O_(4)is uniformly loaded onto HCC,which can introduce magnetic losses into NiCo_(2)O_(4)/HCC composites;Compared with single HCC material,needle-shaped NiCo_(2)O_(4)and its heterogeneous interface structure significantly enhance the microwave absorbing performance of NiCo_(2)O_(4)/HCC composites.The XRD and XPS analysis results indicate that NiCo_(2)O_(4)in the NiCo_(2)O_(4)/HCC composites has a spinel structure.When the filling ratio is 25 wt%and the thickness is 4.98 mm,the reflection loss(RL)of NiCo_(2)O_(4)/HCC composites is as high as-50.00 dB.The TGA-IR analysis results of NiCo_(2)O_(4)/HCC composites in the range of 25—800℃indicate that

关 键 词：钴酸镍 亲水碳布 微波吸收 复合材料 水热法 反射损耗 有效吸收带宽 热裂解 

分 类 号：TB383[一般工业技术—材料科学与工程]