石墨烯-羰基铁粉线材的制备及其吸波性能分析  

Preparation of graphene-carbonyl iron powder wire and analysis of its wave absorption performance

作　　者：叶喜葱[1,2] 欧阳宾 杨超 胡正浪 何恩义 吴海华[1,2] YE Xicong;OUYANG Bin;YANG Chao;HU Zhenglang;HE Enyi;WU Haihua(Graphite Additive Manufacturing Technology and Equipment Hubei Engineering Research Center,China Three Gorges University,Yichang 443002,China;Institute 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：《复合材料学报》2022年第7期3292-3302,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51575313);宜昌市石墨-石墨烯增材制造重点实验室(YKLGAM202001)。

摘　　要：为了提高单一磁性吸波材料的吸波性能,以聚乳酸(PLA)作为基体材料,将磁性材料羰基铁粉(CIP)与石墨烯(RGO)进行复合,制备RGO-CIP/PLA复合材料。通过TG、XRD等多种测试手段对复合材料的结构、形貌等进行表征。同时使用矢量网络分析仪对复合材料的电磁参数进行测试,计算出不同厚度的吸波性能,研究了RGO的添加量对RGO-CIP/PLA复合材料的吸波性能影响。结果表明:当RGO质量分数为4wt%,CIP质量分数为20wt%时,RGO-CIP/PLA复合材料吸波性能最优;吸收厚度为3 mm时,达到了-27.25 dB最小的R值,同时其吸收带宽为2.922 GHz (7.227~10.149 GHz)。同时,随着其吸收厚度的增加,有效吸收带宽(R_(L)<-10 dB)会移动至较低的频带。In order to improve the microwave absorbing properties of single magnetic absorbing material, polylactic acid(PLA) was used as the matrix material, and the magnetic material carbonyl iron powder(CIP) as well as reduced graphene oxide(RGO) were compounded to prepare RGO and CIP/PLA composites. The structure and morphology of the composites were characterized by TG, XRD and other testing methods. Meanwhile, the electromagnetic parameters of the composites were measured by vector network analyzer, and the microwave absorbing properties of different thickness were calculated. The influence of RGO addition on the microwave absorbing properties of RGO and CIP/PLA composites was studied. The results show that when the graphene content is 4wt% and the carbonyl iron powder content is 20wt%, the RGO-CIP/PLA composite has the best absorbing performance. When the absorption thickness is 3 mm, the minimum Rvalue of-27.25 dB is reached, and at the same time its absorption bandwidth is 2.922 GHz(7.227-10.149 GHz). At the same time, as its absorption thickness increases, the effective absorption bandwidth(R_(L)<-10 dB) can move to a lower frequency band.

关 键 词：复合材料 石墨烯 羰基铁粉 吸波性能 电磁参数 

分 类 号：TB333[一般工业技术—材料科学与工程]