Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China.
Beijing Graphene Institute (BGI), Beijing, 100095, China.
Adv Mater. 2023 May;35(18):e2209897. doi: 10.1002/adma.202209897. Epub 2023 Mar 18.
Solar heating and radiative cooling techniques have been proposed for passive space thermal management to reduce the global energy burden. However, the currently used single-function envelope/coating materials can only achieve static temperature regulation, presenting limited energy savings and poor adaption to dynamic environments. In this study, a sandwich-structured fabric, composed of vertical graphene, graphene glass fiber fabric, and polyacrylonitrile nanofibers is developed, with heating and cooling functions integrated through multiband, synergistic, (solar spectrum and mid-infrared ranges) and asymmetric optical modulations on two sides of the fabric. The dual-function fabric demonstrates high adaption to the dynamic environment and superior performance in a zero-energy-input temperature regulation. Furthermore, it demonstrates ≈15.5 and ≈31.1 MJ m y higher annual energy savings compared to those of their cooling-only and heating-only counterparts, corresponding to ≈173.7 MT reduction in the global CO emission. The fabric exhibits high scalability for batch manufacturing with commercially abundant raw materials and facile technologies, providing a favorable guarantee of its mass production and use.
太阳能加热和辐射冷却技术已被提议用于被动空间热管理，以减少全球能源负担。然而，目前使用的单功能外壳/涂层材料只能实现静态温度调节，节能效果有限，对动态环境的适应性也较差。在这项研究中，开发了一种由垂直石墨烯、石墨烯玻璃纤维织物和聚丙烯腈纳米纤维组成的夹层结构织物，通过在织物两侧进行多波段、协同的（太阳光谱和中红外范围）和不对称的光学调制，实现了加热和冷却功能。这种双功能织物对动态环境具有很高的适应性，在零能量输入的温度调节方面表现出卓越的性能。此外，与仅冷却或仅加热的对应物相比，它每年可节省约 15.5 和 31.1 MJ m y 的能量，相当于全球 CO 排放量减少了约 173.7 百万吨。该织物具有商业上丰富的原材料和简单技术的大规模批量制造的高可扩展性，为其大规模生产和使用提供了有利的保证。
