光发光的核心-外结构性多孔纤维为基础的元结构,用于有色白天被动辐射冷却
Jinru Liu1, Bolin Ji1, Yi Zhong1
1National Engineering Research Center for Dyeing and Finishing of Textiles, Innovation Center for Textile Science and Technology, College of Chemistry and Chemical Engineering, Donghua University, Shanghai 201620, P.R. China.
ACS nano
|March 6, 2025
概括
彩色光发光辐射冷却 (CPRC) 的元织物为户外工作者提供可持续的热管理. 这些创新的织品实现了有效的冷却,同时保持了鲜的颜色,解决了当前辐射冷却技术的关键局限性.
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:
- 被动辐射冷却为热环境中的热管理提供了一个可持续的解决方案.
- 目前的日间辐射冷却织品由于其白色或镜像的外观而缺乏美学吸引力.
- 将视觉美学与有效的辐射冷却相结合,对于在户外应用中广泛采用至关重要.
研究的目的:
- 设计和开发彩色光发光辐射冷却 (CPRC) 的元织物.
- 为了在户外应用中实现有效的辐射冷却而不损害颜色美学.
- 探索基于碳点的元织物的潜力,用于可穿戴的节能织品.
主要方法:
- 用纳米结构的光散射外和增强的中红外辐射核心制造同轴多孔纤维.
- 利用碳点的光发光特性进行选择性可见光吸附和光子再发射.
- 太阳光反射,红外热辐射和CPRC元织物的冷却性能的表征.
主要成果:
- CPRC元织物显示有选择性的可见光吸附,显示鲜的颜色,具有高光-光子转换效率 (48.3%).
- 实现了最大净冷却功率为69.2Wm-2,平均冷却温度比商业面料低3.7-3.6°C.
- 这些元织物表现出自我感应的健康监测能力和长时间的耐用性.
结论:
- CPRC元织物成功地将色彩美学与有效的白天辐射冷却相结合.
- 这项技术解决了在开发具有视觉吸引力和功能性的冷却织品方面面临的重大挑战.
- 开发的元织物显示出下一代可穿戴节能解决方案的前景,提高了户外工作人员的安全性和热舒适性.
相关概念视频
01:23Photoluminescence: Fluorescence and Phosphorescence
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
01:14Photoluminescence: Applications
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...