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Highly Sunlight Reflective and Infrared Semi-Transparent Nanomesh Textiles
ACS Nano ( IF 15.8 ) Pub Date : 2021-10-18 , DOI: 10.1021/acsnano.1c04104 Gunwoo Kim 1 , Kyuin Park 2 , Kyung-Jun Hwang 3 , Sungho Jin 4, 5
ACS Nano ( IF 15.8 ) Pub Date : 2021-10-18 , DOI: 10.1021/acsnano.1c04104 Gunwoo Kim 1 , Kyuin Park 2 , Kyung-Jun Hwang 3 , Sungho Jin 4, 5
Affiliation
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Radiative cooling in textiles is one of the important factors enabling cooling of the human body for thermal comfort. In particular, under an intense sunlight environment such as that experienced with outdoor exercise and sports activities, high near-infrared (NIR) reflectance to block sunlight energy influx along with high IR transmittance in textiles for substantial thermal emission from the human body would be highly desirable. This investigation demonstrates that a nanoscale geometric control of textile structure alone, instead of complicated introduction of specialty polymer materials and composites, can enable such desirable NIR and IR optical properties in textiles. A diameter-dependent Mie scattering event in fibers and associated optical and thermal behavior were simulated in relation to a nonwoven, nanomesh textile. As an example, a nanomesh structure made of PVDF (polyvinylidene fluoride) electrospun fibers with ∼600 nm average diameter was examined, which exhibited a significant radiative cooling performance with over 90% solar and NIR reflectance to profoundly block the sunlight energy influx as well as ∼50% IR transmittance for human body radiative heat dissipation. An extraordinary cooling effect, as much as 12 °C, was obtained on a simulated skin compared to the normal textile fabric materials. Such a powerful radiative cooling performance together with IR transmitting capability by the nanomesh textile offers a way to efficiently manage sunlight radiation energy to make persons, devices, and transport vehicles cooler and help to save energy in an outdoor sunlight environment as well as indoor conditions.
中文翻译：
高度阳光反射和红外线半透明纳米网纺织品
纺织品中的辐射冷却是使人体冷却以获得热舒适度的重要因素之一。特别是，在户外运动和体育活动等强烈阳光环境下，高近红外 (NIR) 反射率可阻挡阳光能量流入，同时纺织品中的高红外透射率可用于人体大量热辐射。可取。这项研究表明，仅对纺织品结构进行纳米级几何控制，而不是复杂地引入特殊聚合物材料和复合材料，就可以在纺织品中实现如此理想的 NIR 和 IR 光学特性。纤维中与直径相关的 Mie 散射事件以及相关的光学和热行为与非织造的纳米网纺织品有关。举个例子，研究了由平均直径约 600 nm 的 PVDF（聚偏二氟乙烯）电纺纤维制成的纳米网结构，该结构表现出显着的辐射冷却性能，具有超过 90% 的太阳光和 NIR 反射率，可有效阻挡太阳光能量的流入以及约 50% 的红外线人体辐射散热的透光率。与普通纺织面料材料相比，在模拟皮肤上获得了高达 12°C 的非凡冷却效果。这种强大的辐射冷却性能以及纳米网织物的红外传输能力提供了一种有效管理阳光辐射能量的方法，使人员、设备和运输车辆更凉爽，并有助于在室外阳光环境和室内条件下节省能源。
更新日期：2021-10-26
中文翻译：
高度阳光反射和红外线半透明纳米网纺织品
纺织品中的辐射冷却是使人体冷却以获得热舒适度的重要因素之一。特别是，在户外运动和体育活动等强烈阳光环境下，高近红外 (NIR) 反射率可阻挡阳光能量流入，同时纺织品中的高红外透射率可用于人体大量热辐射。可取。这项研究表明，仅对纺织品结构进行纳米级几何控制，而不是复杂地引入特殊聚合物材料和复合材料，就可以在纺织品中实现如此理想的 NIR 和 IR 光学特性。纤维中与直径相关的 Mie 散射事件以及相关的光学和热行为与非织造的纳米网纺织品有关。举个例子，研究了由平均直径约 600 nm 的 PVDF（聚偏二氟乙烯）电纺纤维制成的纳米网结构，该结构表现出显着的辐射冷却性能，具有超过 90% 的太阳光和 NIR 反射率，可有效阻挡太阳光能量的流入以及约 50% 的红外线人体辐射散热的透光率。与普通纺织面料材料相比，在模拟皮肤上获得了高达 12°C 的非凡冷却效果。这种强大的辐射冷却性能以及纳米网织物的红外传输能力提供了一种有效管理阳光辐射能量的方法，使人员、设备和运输车辆更凉爽，并有助于在室外阳光环境和室内条件下节省能源。
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