Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage,Advanced Functional Materials

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Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-07-10 , DOI: 10.1002/adfm.202201432
Ho Kun Woo ₁ , Kai Zhou ₁ , Su‐Kyung Kim ₂ , Adrian Manjarrez ₁ , Muhammad Jahidul Hoque ₁ , Tae‐Yeon Seong ₂ , Lili Cai ₁

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Tailoring thermal radiation using low-infrared-emissivity materials has drawn significant attention for diverse applications, such as passive radiative heating and thermal camouflage. However, the previously reported low-infrared-emissivity materials have the bottleneck of lacking independent control over visible optical properties. Here, a novel visibly transparent and infrared reflective (VTIR) coating by exploiting a nano-mesh patterning strategy with an oxide–metal–oxide tri-layer structure is reported. The VTIR coating shows simultaneously high transmittance in the visible region (>80% at 550 nm) and low emissivity in the mid-infrared region (< 20% in 7–14 µm). The VTIR coating not only achieves a radiative heating effect of 6.6 °C for indoor conditions but also enables a synergetic effect with photothermal materials to keep human body warm at freezing temperatures for outdoor conditions, which is 10–15 °C warmer than normal cotton and Mylar film. Moreover, it demonstrates an excellent thermal camouflage effect at various temperatures (34–250 °C) and good compatibility with visible camouflage on the same object, making it ideal for both daytime and nighttime cloaking. With its unique and versatile spectral features, this novel VTIR design has great potential to make a significant impact on personal heat management and counter-surveillance applications.

中文翻译：

用于个人热管理和热伪装的可见透明和红外反射涂层

使用低红外发射率材料定制热辐射已经引起了各种应用的极大关注，例如被动辐射加热和热伪装。然而，先前报道的低红外发射率材料的瓶颈是缺乏对可见光学特性的独立控制。在这里，报道了一种新颖的可见透明和红外反射（VTIR）涂层，该涂层采用具有氧化物-金属-氧化物三层结构的纳米网格图案化策略。VTIR 涂层同时在可见光区域显示出高透射率（在 550 nm 处 > 80%）和在中红外区域的低发射率（在 7–14 µm 处 < 20%）。VTIR涂层不仅达到了6的辐射加热效果。室内条件下温度为 6°C，但也能与光热材料产生协同效应，使人体在室外条件下的冰点温度下保持温暖，比普通棉和聚酯薄膜高 10-15°C。此外，它在各种温度（34-250°C）下均表现出出色的热伪装效果，并且与同一物体上的可见伪装具有良好的相容性，使其成为白天和夜间隐身的理想选择。这种新颖的 VTIR 设计凭借其独特且多功能的光谱特征，具有对个人热量管理和反监视应用产生重大影响的巨大潜力。它在各种温度（34-250°C）下都表现出出色的热伪装效果，并且与同一物体上的可见伪装具有良好的兼容性，使其成为白天和夜间隐身的理想选择。这种新颖的 VTIR 设计凭借其独特且多功能的光谱特征，具有对个人热量管理和反监视应用产生重大影响的巨大潜力。它在各种温度（34-250°C）下都表现出出色的热伪装效果，并且与同一物体上的可见伪装具有良好的兼容性，使其成为白天和夜间隐身的理想选择。这种新颖的 VTIR 设计凭借其独特且多功能的光谱特征，具有对个人热量管理和反监视应用产生重大影响的巨大潜力。

更新日期：2022-07-10

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