Designing and manufacturing compatible multi-band stealth materials remains a great challenge. In this work, a silver-metalized polyimide photochromic composite foam is successfully fabricated by self-activating electroless silver-plating on the surface of the polyimide skeleton and followed by applying a photochromic coating on the upper surface. The effective loading of silver nanoparticles facilitates the rational construction of a conductive network in foam, improving the efficient dissipation of incident electromagnetic waves. In addition, the interconnected conductive network successfully endows it with an excellent Joule heating capability, which can be employed to effectively remove ice and/or mitigate the impact of water vapor on radar stealth performance in cold and wet weather. Besides, the low emissivity silver plating combined with superior thermal insulation of foam enables the material with excellent infrared stealth performance. Moreover, the modulation of self-adaptive photochromic coating brings a prominent visual stealth performance under different sunlight backgrounds. As a result, such excellent radar and infrared stealth performance combined with the adaptive color-switching capability provides the foam with great potential for preparing compatible multi-band materials.

中文翻译：

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基于聚酰亚胺的分层复合泡沫，可实现兼容的多频段隐身


设计和制造兼容的多频段隐形材料仍然是一项巨大的挑战。在这项工作中，通过在聚酰亚胺骨架表面进行自激活化学镀银，然后在上表面涂上光致变色涂层，成功制造了银金属化聚酰亚胺光致变色复合泡沫。纳米银粒子的有效负载有助于在泡沫中合理构建导电网络，提高入射电磁波的高效耗散。此外，互连的导电网络成功地赋予了它出色的焦耳热能力，可用于在寒冷和潮湿天气下有效去除冰和/或减轻水蒸气对雷达隐身性能的影响。此外，低辐射率镀银与泡沫的卓越隔热性相结合，使该材料具有出色的红外隐身性能。此外，自适应光致变色涂层的调制在不同阳光背景下带来了突出的视觉隐身性能。因此，如此出色的雷达和红外隐身性能与自适应颜色切换功能相结合，为泡沫提供了制备兼容的多波段材料的巨大潜力。