“Change According to the Situation” – Color‐Accommodative Nature‐Skin‐Derived Thermochromic Membrane for Active All‐Season Thermal Management

作者：Long Xie, Xuechuan Wang, Shuang Liang, Xiaoliang Zou, Siwei Sun, Yi Zhou, Chao Wei, Zhongxue Bai, Ouyang Yue, Xinhua Liu · 发表于：Advanced Functional Materials · 年份：2024 · DOI：10.1002/adfm.202405582 · 被引用次数：28 · 研究领域：Thermal Radiation and Cooling Technologies、Urban Heat Island Mitigation、Transition Metal Oxide Nanomaterials

Abstract Energy crisis and worsening greenhouse effects cause unprecedented global environmental and economic‐sustainability challenges. The emerging all‐season thermal regulation technology that can provide comfort to humans without consuming external‐energy demonstrates promising prospects. Inspired by the temperature‐accommodative skin of the color‐changing rain‐frog, a biodegradable nature‐skin‐derived thermochromic membrane (PCTM‐H) is nano‐engineered for active all‐season thermal management using the integrative interfacially wet‐casting film‐forming and spraying strategy of nature‐skin to incorporate polyvinyl alcohol and thermochromic microcapsules. Its outstanding thermochromic origins allow it to switch adaptively between cooling and heating modes without additional energy input. PCTM‐H has a light color with high reflectivity in hot summer and a dark‐color that absorbs solar radiation in cold winter, with an overall visible light modulation of ≈53.5%, solar modulation of ≈32.2%, and a remarkable emissivity in mid‐infrared band (≈86.7%). PCTM‐H has exceptional adaptive thermal management capabilities for multitudinous outdoor‐applications. Simulation results show that PCTM‐H has prominent energy‐saving efficiency in cities with different climate zones when utilized as roof‐protection membranes. Additionally, the distinguished mechanical features, weatherability, and bio‐degradability of PCTM‐H substantially increase its potential applications. This study provides a ...