通过窄带色彩保存方案进行自我分层的彩色辐射冷却涂料
Dudong Feng1, Andrew S Witty1, Fletcher I Birnbaum1
1School of Mechanical Engineering and the Birck Nanotechnology Center, Purdue University, West Lafayette, IN, 47907, USA.
Advanced materials (Deerfield Beach, Fla.)
|August 20, 2025
概括
这项研究引入了一种用于彩色被动日间辐射冷却的新型自层化涂料. 这种涂料实现了鲜的颜色和高效的冷却, 克服了以前的可扩展性挑战.
科学领域:
- 材料科学
- 纳米技术
- 热力学
背景情况:
- 无源日间辐射冷却 (PDRC) 提供了显著的节能潜力.
- 目前的PDRC技术通常依赖于白色或反射表面,限制了美学和功能应用.
- 实现彩色的PDRC表面在加工过程中面临着可扩展性的挑战.
研究的目的:
- 开发一种新的,通用的,可扩展的自我分层方法来创建彩色辐射冷却涂料.
- 证明生产各种颜色具有高效的冷却性能的可行性.
- 解决PDRC材料中的色彩和冷却性能之间的权衡问题.
主要方法:
- 一种使用窄带吸收染料的自我分层涂料配方.
- 单层应用导致自发形成吸收散射双层结构.
- 光学性能 (太阳反射率,发射率),冷却性能和机械性能 (磨损,粘附,接触角度) 的表征.
主要成果:
- 已证明色,红色和黄色涂料可以达到93%的太阳反射率和0.94天窗发射率,用于环境下冷却.
- 开发了一种具有46.3%太阳反射率和25°C温度下降的黑色涂料.
- 紫色涂料展示了CMYK空间中的颜色定制.
- 机械和表面性能与商业产品相匹配或超过.
结论:
- 自分层的涂料方法使得白天的色彩被动辐射冷却具有更好的性能.
- 这种方法克服了可扩展性的局限性,并为各种应用提供了途径.
- 这些发现为开发用于冷却和收集水的先进油漆提供了洞察力.
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