高耐用,辐射冷却和隔热的柔性薄膜由生物启发的Dictyophora-like结构实现
Jianlin Zhou1, Canxia Ding1, Xuehui Zhang2
1Department of Materials Science and Advanced Coatings Research Center of Ministry of Education, Fudan University, Shanghai 200438, P. R. China.
ACS applied materials & interfaces
|November 30, 2023
概括
这项研究引入了一种由大自然启发的新型空洞@多孔辐射冷却膜. 该材料在白天实现了显著的冷却,并提高了各种应用的耐用性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 可持续能源 可持续能源
背景情况:
- 辐射冷却材料在高温环境和户外耐用性方面面临限制.
- 现有的材料经常在长时间使用时降解,限制广泛应用.
- 需要先进的材料,以有效的热管理和节能.
研究的目的:
- 开发一种具有提高性能和耐用性的新型辐射冷却膜.
- 为了解决当前辐射冷却技术的局限性.
- 探索生物启发的设计,用于增强的冷却材料.
主要方法:
- 使用空洞微粒和多孔聚合物制造空洞@多孔的辐射冷却膜.
- 一个生物灵感结构的整合,模仿Dictyophora.
- 光学特性 (反射率,发射率) 和热导率的表征.
- 在太阳能强度下的白天冷却性能的实验演示.
主要成果:
- 空洞透膜具有高的阳光反射 (93.7%) 和红外发射率 (89.1%).
- 实现了超低的导热率 (17.56 mW/m·K).
- 在980W/m2太阳能强度下,日间显著降温,降温17.4°C.
- 增强耐用性,具有耐候性和自我清洁性能.
结论:
- 新的空洞@多孔辐射冷却膜提供了卓越的性能和耐用性.
- 生物灵感设计为先进的辐射冷却材料提供了途径.
- 在热管理,节能和各种设备冷却方面的潜在应用.
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