生物灵感可切换的被动白天辐射冷却涂层
Tiancheng Wang1, Yuzhe Xiao2,3, Jonathan L King2
1Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.
ACS applied materials & interfaces
|October 9, 2023
概括
研究人员开发了一种新的生物灵感涂层,用于被动白天辐射冷却 (PDRC). 这种薄而坚固的材料模仿自然,反射阳光并发出热量,为空调提供了一个环保的替代方案.
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:
- 被动日间辐射冷却 (PDRC) 为传统电气空调 (AC) 提供了一个环保的替代方案.
- 优化PDRC涂层需要平衡实践应用的多个性能方面.
- 大自然为先进的材料功能提供了生物灵感模型.
研究的目的:
- 开发一种以自然结构为灵感的高性能PDRC涂层.
- 在薄涂层中实现出色的太阳反射率,LWIR发射率和机械强度.
- 展示生物灵感设计对可扩展和可调节的冷却解决方案的潜力.
主要方法:
- 使用双连续的间接塞乳液凝 (bijels) 作为模板制造PDRC涂层.
- 涂层的光学特性 (太阳反射率和LWIR发射率) 的表征.
- 评估涂层在直接阳光下的热性能,并评估其机械性能.
主要成果:
- 生物启发的比杰尔PDRC涂层实现了高太阳反射率 (0.97) 和LWIR发射率 (0.93).
- 一种薄薄的涂层 (130微米) 在直接阳光下显示出 ~5.6°C的显著下降.
- 该PDRC涂层表现出可切换的冷却能力和机械强度,灵感来自甲虫外骨和海绵状骨.
结论:
- 生物灵感的PDRC涂层基于bijels提供了一个有希望的,高性能解决方案,用于可持续的冷却.
- 开发的材料表现出优良的光学和热性能,以及理想的机械特性.
- 这种方法强调了仿生技术在创造先进,可扩展的辐射冷却技术方面的潜力.
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