三级结构诱导高效的被动辐射冷却,结合强大的抗冷凝
Zehong Zhao1, Chengning Tang1, Enming Cui1
1State Key Laboratory of High-performance Precision Manufacturing, Dalian University of Technology, Dalian 116024, PR China.
ACS nano
|May 15, 2025
概括
这项研究提出了一种用于被动辐射冷却的新型三级结构,即使在高湿度下,也能达到显著的下环境温度. 该设计提高了冷却效率,并防止了冷凝,提供了持久的热管理解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 热力学是一种热力学.
- 光学是什么?光学是什么?
背景情况:
- 通过向空间发射热辐射,被动辐射冷却提供了无能量下环境冷却.
- 现有方法面临的挑战是抗凝结,限制在潮湿条件下使用.
研究的目的:
- 开发一种具有强大的抗凝结性能的被动辐射冷却设计.
- 研究三级结构对冷却效率和耐用性的影响.
主要方法:
- 使用微尺度聚合物颗粒,亚微米间隙和纳米尺度毛孔制造三重尺度结构.
- 在不同湿度下,光学性能 (反射率,发射率) 和热性能的表征.
- 对抗凝结性能 (滴滴脱落,覆盖) 和材料耐用性的评估.
主要成果:
- 在40%的相对湿度下达到10.9°C的环境下冷却,具有高的阳光反射率 (0.98) 和中红外辐射率 (0.91).
- 在70%的相对湿度下显示显著的冷却 (~4°C),性能优于传统材料.
- 展现出强大的反凝结,有效的滴滴散射和由于三级结构减少了覆盖范围.
结论:
- 三级结构有效地提高了被动辐射冷却和抗凝结性能.
- 这种设计显示了在多样化和极端环境中可靠的热管理的潜力.
- 该材料具有出色的耐用性,包括自我清洁,耐热和抗UV.
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