Metal-Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation PerformancesOACSTPCD
Metal-Organic Gel Leading to Customized Magnetic-Coupling Engineering in Carbon Aerogels for Excellent Radar Stealth and Thermal Insulation Performances
Metal-organic gel(MOG)derived composites are promising multi-functional mate-rials due to their alterable composition,identifi-able chemical homogeneity,tunable shape,and porous structure.Herein,stable metal-organic hydrogels are prepared by regulating the com-plexation effect,solution polarity and curing speed.Meanwhile,collagen peptide is used to facilitate the fabrication of a porous aerogel with excellent physical properties as well as the homogeneous dispersion of magnetic particles during calcination.Subsequently,two kinds of heterometallic magnetic coupling systems are obtained through the application of Kirkendall effect.FeCo/nitrogen-doped carbon(NC)aerogel demonstrates an ultra-strong microwave absorption of-85 dB at an ultra-low loading of 5％.After reducing the time taken by atom shifting,a FeCo/Fe3O4/NC aerogel containing virus-shaped particles is obtained,which achieves an ultra-broad absorption of 7.44 GHz at an ultra-thin thickness of 1.59 mm due to the coupling effect offered by dual-soft-magnetic particles.Furthermore,both aerogels show excellent thermal insulation property,and their outstanding radar stealth performances in J-20 aircraft are confirmed by computer simulation technology.The formation mechanism of MOG is also discussed along with the thermal insulation and electromagnetic wave absorption mechanism of the aerogels,which will enable the development and application of novel and lightweight stealth coatings.
Xin Li;Xuliang Nie;Ruizhe Hu;Zhiqiang Xiong;Dan Wang;Zhixia Zhang;Chongbo Liu;Xiaojun Zeng;Dezhi Chen;Renchao Che
Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,Nanchang Hangkong University,Nanchang 330063,People's Republic of China||School of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,People's Republic of ChinaCollege of Chemistry and Materials,Jiangxi Agricultural University,Nanchang 330045,People's Republic of ChinaSchool of Environmental and Chemical Engineering,Nanchang Hangkong University,Nanchang 330063,People's Republic of ChinaSchool of Materials Science and Engineering,Jingdezhen Ceramic University,Jingdezhen 333403,People's Republic of ChinaLaboratory of Advanced Materials,Department of Materials Science and Collaborative Innovation Center of Chemistry for Energy Materials and Collaborative Innovation Center of Chemistry for Energy Materials,Fudan University,Shanghai 200438,People's Republic of China
Metal-organic gelsHeterometallic magnetic couplingRadar stealthThermal insulationComputer simulation technology
《纳微快报（英文）》 2024 (003)
36-52 / 17
This work was supported by the National Natural Science Foundation of China(22265021)and the Aeronau-tical Science Foundation of China(2020Z056056003).The authors would like to thank Shiyanjia Lab(https://www.shiyanjia.com)for XPS analysis and MJEditor(https://www.mjeditor.com)for its lin-guistic assistance during the preparation of this manuscript.
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