材料科学
热舒适性
辐射冷却
水分
被动冷却
润湿
杰纳斯
发射率
蒸发
复合材料
热的
环境科学
纳米技术
光学
气象学
物理
作者
Chonghui Fan,Yuxin Zhang,Zhiwen Long,Alfred Mensah,Qingqing Wang,Pengfei Lv,Qufu Wei
标识
DOI:10.1002/adfm.202300794
摘要
Abstract Incorporating zero‐energy‐input cooling technology into personal thermal management (PTM) systems is a promising solution for preventing heat‐related illnesses while reducing energy consumption. Although concepts for passive radiative cooling materials are proposed, achieving subambient cooling performance while providing good wearing comfort remains a challenge. Here, a moisture‐wicking nonwoven metafabric is reported that assembles radiative cooling and evaporative heat dissipation to achieve high‐performance thermal and moisture comfort management. This metafabric demonstrates excellent spectral‐selectivity (sunlight reflection of ≈92%, atmospheric window thermal emissivity of ≈97%) and Janus wettability through large‐scale electrospinning and hierarchical design, and also inherits superior elasticity, air/moisture permeability of nonwoven fabric. Subambient temperature drops of ≈6.5 °C (≈750 W m −2 solar intensity) for stand‐alone metafabric are observed. Thanks to the moisture‐wicking effect (water evaporation rate of 0.31 g h −1 and water transport index of 1220%) of metafabric that enables fast evaporation of sweat, a maximum generation of 1 mL h −1 of sweat can cool the skin, thus reducing the excessive sweating risk after intense exercise. Additionally, the cooling performance of metafabric can be regulated by applying various strains (0–100%). The cost‐efficiency and good wearability of metafabric provide an innovative way to sustainable energy, smart textiles, and thermal wet comfort applications.
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