MOFs衍生的多孔材料Co/C的吸波性能研究  

Study on the wave-absorbing properties of MOFs-derived porous materials Co/C

作　　者：曹雪芳 贾雪菲 贺永亮 郭江 Cao Xuefang;Jia Xuefei;He Yongliang;Guo Jiang(School of Engineering for Safety and Emergency Management,Taiyuan University of Science and Technology,Taiyuan 030024;School of Environmental and Safety Engineering,North University of China,Taiyuan 038507)

机构地区：[1]太原科技大学安全与应急管理工程学院,太原030024 [2]中北大学环境与安全工程学院,太原038507

出　　处：《化工新型材料》2024年第2期130-138,共9页New Chemical Materials

基　　金：山西省青年科学研究资助项目(202203021222205和202203021222184);太原科技大学科研启动基金资助项目(20222113和20222112);来晋优秀博士科研启动基金资助项目(20232040);太原科技大学校级大学生创新创业训练项目资助(XJ2023001);山西省高等学校大学生创新创业训练计划项目(20230661)。

摘　　要：以金属有机配合物[Co(tza)_(2)]n为前驱体,采用防爆反应釜高温煅烧法分别在不同温度下制备得到碳复合材料Co/C,研究了它们的组分、电磁参数和吸波性能。结果表明:Co/C与石蜡以质量比1∶1混合后,450℃下获得的多孔纳米碳复合吸波剂Co/C-450的吸波性能最好,在厚度1.5mm处,有效吸收带宽为4.2GHz。此外,在0~18GHz和1.0~5.5mm的范围内,Co/C-450的总有效吸收带宽为13.3GHz(4.7~18GHz),实现了雷达多频段的有效吸收。复合材料良好的吸波性能是由于磁性Co纳米粒子和碳材料的协同作用,以介电损耗机制为主,实现对电磁波的有效吸收。不仅丰富了MOFs衍生物的吸波性能调控研究和结构设计,还为碳复合材料的轻质宽频研究提供了新思路。Metal-organic framework[Co(tza)_(2)]n was used as the precursor to prepare carbon composite materials Co/C by high-temperature calcination in the explosion-proof reaction kettle at different temperatures.Their composition,electromagnetic parameters,and absorption properties were studied.The results showed that the porous nanocarbon composite absorbent Co/C-450 obtained at 450℃ after mixing with paraffin in a mass ratio of 1∶1 had the best electromagnetic wave absorption performance,with an effective absorption bandwidth of 4.2GHz at a thickness of 1.5mm.In addition,in the ranges of 0~18GHz and 1.0~5.5mm,the total effective absorption bandwidth of the sample Co/C-450 was 13.3GHz(4.7~18GHz),achieving effective absorption of radar multi frequency bands.The good wave absorption performance of the composite was attributed to the synergetic effect of magnetic Co nanoparticles and carbon materials,which was dominated by the dielectric loss mechanism to achieve effective absorption of electromagnetic waves.It not only enriched the research and structural design of the absorption performance regulation of MOFs derivatives,but also provided new ideas for the lightweight and broadband research of carbon composite materials.

关 键 词：金属有机配合物 碳复合物 反射损耗 

分 类 号：TB334[一般工业技术—材料科学与工程]