用于电磁波宽频吸收的1D/2D亚纳米基元复合气凝胶材料的制备
白宝强 , 张涛 , 陈佳 , 付蕊 , 赛华征
现代化工 ›› 2026, Vol. 46 ›› Issue (11) : 102 -106.
用于电磁波宽频吸收的1D/2D亚纳米基元复合气凝胶材料的制备
Fabrication of 1D/2D sub-nanometer unit composite aerogel materials for broadband electromagnetic wave absorption
为解决电磁波污染问题,以1D GdOOH亚纳米线与2D CuO-PMA亚纳米片为前驱体,按不同质量比(1∶1、2∶1和 3∶1)进行机械混合,并结合冷冻铸造、真空干燥及后续热处理工艺,成功制备出1D/2D复合亚纳米片气凝胶。通过扫描电镜(SEM)、X射线衍射(XRD)及矢量网络分析仪等手段,系统表征了材料的微观结构与电磁波吸收性能。结果表明,所得气凝胶呈现典型的蜂窝状多孔结构,经热处理后密度为90 mg/cm3。在电磁波吸收性能方面,该材料最小反射损耗可达-68.1 dB,最大有效吸收带宽为8.4 GHz。本研究为开发具备“薄、轻、宽、强”特性的微波吸收材料提供了可行的材料设计思路与制备途径。
To address the issue of electromagnetic wave pollution,this study utilized 1D GdOOH sub-nanowires and 2D CuO-PMA sub-nanosheets as precursors.These were mechanically mixed at different mass ratios (1∶1,2∶1,and 3∶1) and processed through freeze-casting,vacuum drying,and subsequent heat treatment to successfully fabricate 1D/2D composite sub-nanosheet aerogels.The microstructure and electromagnetic wave absorption properties of the materials were systematically characterized using scanning electron microscopy (SEM),X-ray diffraction (XRD) and a vector network analyzer.The result illustrates that the prepared aerogel exhibits a typical honeycomb-like porous structure,with a density of 90 mg/cm3 after heat treatment.In terms of electromagnetic wave absorption performance,the minimum reflection loss (RLmin) reaches -68.1 dB,and the maximum effective absorption bandwidth (EABmax) is 8.4 GHz.This study provides a feasible material design strategy and preparation route for developing microwave absorbing materials with the characteristics of being “thin,light,wide,and strong.”
sub-nanowires / sub-nanosheets / freeze-casting / microwave absorption
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| [6] |
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| [7] |
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| [8] |
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| [9] |
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| [10] |
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| [11] |
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| [12] |
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| [13] |
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| [14] |
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国家自然科学基金地区项目(22466028)
国家自然科学基金地区项目(52164013)
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