自适应和可调 MXene/还原氧化石墨烯混合气凝胶复合材料与相变材料和热致变色涂层相结合，用于同步可见光/红外伪装,ACS Nano

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自适应和可调 MXene/还原氧化石墨烯混合气凝胶复合材料与相变材料和热致变色涂层相结合，用于同步可见光/红外伪装
ACS Nano ( IF 15.8 ) Pub Date : 2023-03-30 , DOI: 10.1021/acsnano.3c00573
Bai-Xue Li _{1,

2} , Zhuo Luo ₁ , Wei-Guang Yang ₂ , Hao Sun ₂ , Yun Ding ₁ , Zhong-Zhen Yu _{2,

3} , Dongzhi Yang ₁

Affiliation

尽管红外/可见波段下的单一功能伪装取得了长足的进步，但伪装材料仍难以应对跨越可见光和红外光谱的协同探测，适应复杂多变的场景。在此，通过将各向异性 MXene/还原氧化石墨烯混合气凝胶与其底部的正十八烷相变材料相结合，制造了一种集隔热、吸热、太阳能/电热转换和热致变色于一体的三层复合材料，用于可见光和红外线双重伪装以及其上表面的热致变色涂层。受益于多孔气凝胶层的隔热和正十八烷相变层的吸热所产生的协同传热抑制，该复合材料在白天的丛林和夜间的所有场景中都可以充当斗篷，从周围环境的红外图像中隐藏目标特征，并且可以凭借其绿色外观帮助目标逃避视觉监视。对于沙漠场景，复合材料可以通过太阳能热能转换自发地提高其表面温度，将目标的红外图像融合到高温环境中；同时，它可以将表面颜色从原来的绿色变为黄色，使目标在视觉上从周围的沙地和山丘中消失。这项工作为设计自适应和可调节的集成伪装材料以应对复杂环境中的多波段监视提供了一种有前途的策略。

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Adaptive and Adjustable MXene/Reduced Graphene Oxide Hybrid Aerogel Composites Integrated with Phase-Change Material and Thermochromic Coating for Synchronous Visible/Infrared Camouflages

Although single-function camouflage under infrared/visible bands has made great advances, it is still difficult for camouflage materials to cope with the synergy detection spanning both visible and infrared spectra and adapt to complex and variable scenarios. Herein, a trilayer composite integrating thermal insulation, heat absorption, solar/electro-thermal conversions, and thermochromism is fabricated for visible and infrared dual camouflages by combining anisotropic MXene/reduced graphene oxide hybrid aerogel with the n-octadecane phase change material in its bottom and a thermochromic coating on its upper surface. Benefiting from the synergetic heat-transfer suppression derived from the thermal insulation of the porous aerogel layer and the heat absorption of the n-octadecane phase-change layer, the composite can serve as a cloak to hide the target signatures from the infrared images of its ambient surroundings during the day in the jungle and at night in all scenes and can assist the target in escaping visual surveillance by virtue of its green appearance. For desert scenarios, the composite can spontaneously increase its surface temperature via its solar-thermal energy conversion, merging infrared images of the targets into the high-temperature surroundings; meanwhile, it can vary the surface color from the original green to yellow, enabling the target to visually disappear from ambient sands and hills. This work provides a promising strategy for designing adaptive and adjustable integrated camouflage materials to counter multiband surveillance in complicated environments.

更新日期：2023-03-30

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