College of Materials Science and Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, PR China; School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710129, PR China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture & Technology, Xi'an, Shaanxi 710055, PR China.
J Colloid Interface Sci. 2022 Mar;609:330-340. doi: 10.1016/j.jcis.2021.12.012. Epub 2021 Dec 4.
Multiband-compatible stealth materials play an increasingly crucial role in the field of modern military defence because they can enable the targeted objects to dodge advance detection technologies. In this study, chain-like FeO@poly(ethyleneglycol dimethacrylate-co-methacrylic acid) nanocomposites were constructed as precursors through the magnetic field-induced distillation precipitation polymerisation. Then, the liquid-phase seed-mediated growth method, together with subsequent calcination, was applied to introduce SnO shells and remove poly(ethyleneglycol dimethacrylate-co-methacrylic acid) shells, which led to the successful preparation of innovative core-shell FeO@SnO nanochains. The unique microstructure and appropriate components endowed nanochains with multiple functional applications. The minimum reflection loss value was approximately -39.4 dB (5.67 GHz), exhibiting excellent microwave absorption performance. The possible microwave absorption mechanisms involve interfacial polarisation, space charge polarisation, natural resonance, and multiple reflections and scatterings. The optimal infrared reflectivity reached 0.64, 0.51, and 0.37 in three atmospheric windows, indicating outstanding infrared stealth performance, which was attributed to the intense infrared reflection of SnO shells. Furthermore, three nanochains showed different colours (dark green, brick red, and bright orange), revealing selection absorption for visible light. This can be attributed to the combined effect of visible responses of SnO shells along with Bragg diffraction from the periodic arrangement of FeO particles in a single nanochain. Thus, core-shell FeO@SnO nanochains can be considered as promising radar-infrared-visible compatible stealth materials. This discovery opens a new means to exploit multiband-compatible stealth materials.
多频兼容隐身材料在现代军事防御领域发挥着越来越重要的作用，因为它们可以使目标物体躲避先进的探测技术。在本研究中，通过磁场诱导蒸馏沉淀聚合，构建了链状 FeO@聚（乙二醇二甲基丙烯酸酯-共-甲基丙烯酸）纳米复合材料作为前驱体。然后，采用液相种子介导生长法，并随后进行煅烧，引入了 SnO 壳并去除了聚（乙二醇二甲基丙烯酸酯-共-甲基丙烯酸）壳，成功制备了创新的核壳 FeO@SnO 纳米链。独特的微观结构和适当的组成赋予了纳米链多种功能应用。最小反射损耗值约为-39.4 dB（5.67 GHz），表现出优异的微波吸收性能。可能的微波吸收机制包括界面极化、空间电荷极化、自然共振以及多次反射和散射。在三个大气窗口中，最佳的红外反射率达到 0.64、0.51 和 0.37，表现出优异的红外隐身性能，这归因于 SnO 壳的强烈红外反射。此外，三条纳米链呈现出不同的颜色（深绿色、砖红色和亮橙色），显示出对可见光的选择吸收。这可以归因于 SnO 壳的可见光响应与单个纳米链中 FeO 颗粒的周期性排列的布拉格衍射的综合效应。因此，核壳 FeO@SnO 纳米链可以被认为是一种有前途的雷达-红外-可见光兼容隐身材料。这一发现为开发多频兼容隐身材料开辟了新途径。
