磁性石墨烯气凝胶复合材料的制备及其性能研究  

Preparation and properties of magnetic graphene aerogel composites

作　　者：罗祖云[1] 张嘉冰 蔡雨晴 刘昕悦 吕燕根[1] LUO Zu-yun;ZHANG Jia-bing;CAI Yu-qing;LIU Xin-yue;LV Yan-gen(Zhicheng College,Fuzhou University,Fuzhou 350002,China)

机构地区：[1]福州大学至诚学院,福建福州350002

出　　处：《现代化工》2024年第7期175-179,共5页Modern Chemical Industry

基　　金：福建省科技计划项目引导性项目(2023Y0008);福建省中青年教师教育科研项目(JAT210645);国家级大学生创新创业训练计划项目(202313470004);省级一流本科专业项目(ZJ2248);校级科教创新群体培育项目(ZCKC23002)。

摘　　要：针对石墨烯材料在吸波领域存在介电常数较大、阻抗匹配差等缺点,采用水热法调控石墨烯与Fe_(3)O_(4)的比例,制备一种兼具宽频带、轻质、高吸波性能的磁性石墨烯气凝胶复合材料(Fe_(3)O_(4)/GA)。对复合材料的形貌、结构及吸波性能进行表征和分析,结果表明,该复合材料呈三维多孔结构,Fe_(3)O_(4)纳米颗粒均匀负载在石墨烯表面;复合材料在较宽的频带上均表现出优异的吸波性能,且随着Fe质量的增加复合材料的吸波性能逐渐增强;当FeCl_(3)·6H_(2)O添加质量为0.42 g时,复合材料Fe_(3)O_(4)/GA-0.42的RLmin在15.6 GHz处达到-49.75 dB,厚度为3 mm时的有效吸收频带宽为7.12 GHz,具有良好的吸波性能。In view of the shortcomings of graphene in the field of wave absorption,such as large dielectric constant and poor impedance matching,a kind of magnetic graphene aerogel composites(Fe_(3)O_(4)/GA)with wide band,light weight and high microwave absorption performance are prepared through using hydrothermal method to regulate the ratio of graphene to ferrosoferric oxide.The morphology,structure and microwave absorption property of the composites are characterized and analyzed.It is indicated by the results that the composites have a three-dimensional porous structure,and ferrosoferric oxide nanoparticles are uniformly loaded on the graphene surface.The composites exhibit excellent microwave absorbing property over a wide frequency band,and their microwave absorbing property increase gradually with the increasing Fe content.As the addition amount of FeCl_(3)·6H_(2)O is 0.42 g,the RLmin of Fe_(3)O_(4)/GA-0.42 composites reaches-49.75 dB at 15.6 GHz,and the effective absorption bandwidth of the composites are 7.12 GHz when the thickness is 3 mm,showing a good microwave absorption performance.

关 键 词：氧化石墨烯 气凝胶 复合材料 吸波性能 

分 类 号：TB430[一般工业技术]