石墨烯增强Fe_(3)O_(4)/乙基纤维素复合微球吸波性能  

Graphene-enhanced Fe_(3)O_(4)/ethylcellulose composite microspheres with wave absorption properties

作　　者：叶永盛 丁迪 吴海华[1,2] 何恩义 殷诗浩[2] 胡正浪 杨超 YE Yongsheng;DING Di;WU Haihua;HE Enyi;YIN Shihao;HU Zhenglang;YANG Chao(Graphite Additive Manufacturing Technology and Equipment Hubei Engineering Research Center,China Three Gorges University,Yichang 443002,China;School of Machinery and Power,China Three Gorges University,Yichang 443002,China)

机构地区：[1]三峡大学石墨增材制造技术与装备湖北省工程研究中心,宜昌443002 [2]三峡大学机械与动力学院,宜昌443002

出　　处：《航空学报》2023年第11期296-310,共15页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(51575313);石墨增材制造技术与装备湖北省工程研究中心开放基金(HRCGAM202106);石墨增材制造宜昌市重点实验室开放基金(YKLGAM202005)。

摘　　要：多元复合材料有利于实现高效、轻质、宽频的吸波效果,在航空航天领域具有重要的研究与应用价值。通过乳化反应制备了以乙基纤维素(Ec)为骨架的还原氧化石墨烯(rGO)-Fe_(3)O_(4)/Ec复合微球,采用X射线衍射仪(XRD)、拉曼光谱(Raman)、扫描电子显微镜(SEM)和矢量网络分析仪(VNA)对复合微球的物相结构、微观形貌和电磁性能进行表征与分析。结果显示复合微球内部通过Ec与rGO、Fe_(3)O_(4)有序组合,Ec形成丰富的多孔结构,增强了微波多重反射和散射。当rGO含量为6.6wt%、厚度为1.8 mm时,在14.32 GHz处达到最小反射损耗(−30.35 dB),有效吸收频宽为4.88 GHz(12.24~17.12 GHz)。Multi-component composite materials are conducive to the realization of high-efficiency,light-weight and broadband absorbing effects,and have important research and application value in the aerospace field.Reduced Gra⁃phene Oxide(rGO)-Fe_(3)O_(4)/Ethyl Cellulose(Ec)composite microspheres with Ec as the skeleton were prepared by emulsification reaction,and the physical structure,microscopic morphology and electromagnetic properties of the composite microspheres were characterized and analyzed by X-Ray Diffractometer(XRD),Raman Spectroscopy(Raman),Scanning Electron Microscopy(SEM)and Vector Network Analyzer(VNA).The results show that the composite microspheres are ordered internally by the combination of Ec with rGO and Fe_(3)O_(4),and Ec forms a rich po⁃rous structure,which enhances multiple reflection and scattering of microwaves.When the graphene content is 6.6wt%and the thickness is 1.8 mm,the minimum reflection loss(–30.35 dB)is achieved at 14.32 GHz,and the ef⁃fective absorption bandwidth is 4.88 GHz(12.24–17.12 GHz).

关 键 词：石墨烯 复合材料 吸波机理 阻抗匹配 Fe_(3)O_(4) 

分 类 号：V257[一般工业技术—材料科学与工程]