自分层的光子辐射冷却复合材料具有不对称的导热率
Yi Zhou1, Canhui Lu1, Wanlin Wu1
1State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, 610065, China. rui.xiong@scu.edu.cn.
研究人员开发了一种用于被动白天辐射冷却 (PDRC) 的新型复合材料. 这种先进的材料为电子产品提供了高效的热管理,具有结构色彩和增强的冷却性能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 热力工程是热力工程中的一个.
背景情况:
- 高功率的户外电子设备需要高效的热管理解决方案.
- 无源日间辐射冷却 (PDRC) 是一项有前途的技术,但在导热性和色彩方面面临着挑战.
- 现有的PDRC材料经常遭受性能降低和有限的美学选择.
研究的目的:
- 为下一代电子热管理开发高性能,美观多功能PDRC材料.
- 解决当前PDRC技术的局限性,包括低导热率和与颜色相关的性能问题.
- 为先进的辐射冷却复合材料创建一个可扩展的制造方法.
主要方法:
- 使用自我分层工艺制造具有层次结构的非对称双层复合材料.
- 纤维素纳米晶 (CNC) 光子网格与化 (BN) 纳米板框架的集成.
- 光学特性 (结构颜色,太阳反射率) 和热特性 (发射率,导热率) 的表征.
主要成果:
- 该复合材料实现了高中红外发射率 (91.5%) 和太阳反射率 (96.9%).
- 测量了8.9W m-1 K-1 的增强通过平面导热率.
- 在现实的条件下,在压制寄生虫热量增长的情况下,可以达到高达17.8°C的显著温度下降.
结论:
- 开发的复合材料展示了高性能被动白天辐射冷却.
- 通过丝网印刷进行可扩展的结构色彩图案是可行的,而不会影响冷却效率.
- 这项工作提出了一个可行的策略,用于创建耐用,可定制和高性能辐射冷却材料,用于电子热管理.
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