Pian Sijie, Wang Zhuning, Lu Chengtao, Wu Peixuan, Chen Qikai, Liu Xu, Ma Yaoguang
State Key Laboratory for Extreme Photonics and Instrumentation, College of Optical Science and Engineering, Intelligent Optics and Photonics Research Center, Jiaxing Research Institute, International Research Center for Advanced Photonics, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China.
iScience. 2024 Sep 13;27(10):110948. doi: 10.1016/j.isci.2024.110948. eCollection 2024 Oct 18.
The art of passive thermal management lies in effectively mitigating heat stress by manipulating the optical spectra of target objects. However, a significant obstacle remains in finding a structure that can seamlessly adapt to diverse thermal environments. In response to this challenge, we posit that Janus fabrics have unique advantages for multi-scene applications when carefully engineered. A Janus fabric with an upper side exhibiting a 92% solar reflectivity and a 94% emissivity, along with a lower side possessing an infrared emissivity below 30% could enable energy savings at a large scale. It outperforms commercial products in terms of energy-saving efficiency under different climate conditions. Furthermore, the scalable manufacturing compatibility and outstanding performance make the Janus structure a promising avenue for diverse passive thermal management scenarios.
被动热管理的技术在于通过操控目标物体的光谱来有效减轻热应激。然而，在寻找一种能够无缝适应各种热环境的结构方面，仍然存在重大障碍。针对这一挑战，我们认为，经过精心设计的双面织物在多场景应用中具有独特优势。一种上表面具有92%的太阳反射率和94%的发射率，而下表面的红外发射率低于30%的双面织物，能够实现大规模的节能。在不同气候条件下，其节能效率优于商业产品。此外，可扩展的制造兼容性和出色的性能使双面结构成为各种被动热管理场景的一条有前景的途径。
