来自生物质的多聚二氧化纳米纤维增强多孔气凝,可在全天候和天气条件下提供持久的被动辐射冷却
Jie Xu1, Kangwei Chen1, Alessandro Maturilli2
1Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.
ACS nano
|October 30, 2025
概括
本研究介绍了一种用于被动辐射冷却 (PRC) 的新型可持续气凝冷却器. 该材料实现了高的阳光反射和热辐射,提供显著的冷却功率和温度降低,而无需能源消耗.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
- 纳米技术纳米技术
背景情况:
- 被动辐射冷却 (PRC) 提供了一种可持续的,无能源的冷却方法,通过反射阳光和发射热量来冷却.
- 高日间太阳辐射对中国的有效表现构成重大挑战.
- 开发先进的材料对于克服局限性和提高中国的效率至关重要.
研究的目的:
- 设计和制造一种新的可持续气凝冷却器,用于高效的被动辐射冷却.
- 为了应对白天冷却应用期间高太阳辐射的挑战.
- 为了评估材料的性能和性能,用于实际的辐射冷却.
主要方法:
- 在微型和纳米多孔生物质衍生气凝中加入一维的多聚二氧化纳米纤维 (1D PSNFs).
- 为增强辐射特性形成一个三维框架.
- 光学特性,冷却性能,热稳定性和表面特征的表征.
主要成果:
- 气凝冷却器实现了>97%的阳光反射和热辐射.
- 在720小时内显示出138.6W m-2的冷却功率,使环境温度降低了9°C.
- 呈现出低热导率 (29.0 mW m-1 K-1),超水性 (接触角~175°),低密度 (44.43 kg/m3) 和大表面积 (137.84 m2/g).
结论:
- 开发的可持续气凝冷却器可以在各种天气条件下有效地实现被动辐射冷却.
- 该材料的独特特性确保了高性能和环境可持续性.
- 这项研究为节能冷却技术提供了一个有前途的解决方案.
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