加盐增强纤维膜具有高红外辐射和水友性,用于高效的被动冷却
Yanshan Ju1, Peng Yang1, Jiajun He1
1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China.
ACS applied materials & interfaces
|March 19, 2024
概括
这项研究引入了一种新的盐增强纤维膜,用于被动冷却. 该材料提供了改进的湿度管理和阻燃性,在炎热,潮湿的条件下可以节能冷却.
科学领域:
- 材料科学 材料科学 材料科学
- 织工程 织工程 织工程
- 纳米技术纳米技术
背景情况:
- 辐射冷却面料提供节能舒适性,但受到汗水积累和效率降低的影响.
- 现有的聚合物冷却膜往往在高热管理方面扎,特别是在炎热和潮湿的气候下.
研究的目的:
- 开发一种通用方法,用于制造具有高红外辐射和水友性的 (Ca) 盐增强纤维膜.
- 提高被动冷却性能,并在冷却面料中引入阻燃性和紫外线抵抗性.
- 为了解决当前冷却技术的局限性,例如汗水积累和效率降低.
主要方法:
- 使用各种盐 (CaSiO3,CaSO3,CaHPO4) 修改纤维膜,以增强红外辐射和水友性.
- 作为一个代表性的例子,制造一个CaSiO3@PMMA纤维膜.
- 太阳光谱反射率,大气窗口发射率和超性 (接触角度) 的表征.
- 在直接阳光下对被动冷却性能的评估,以及对阻燃性和抗紫外线的评估.
主要成果:
- 该CaSiO3@PMMA膜实现了高太阳反射率 (~94.5%) 和大气窗口发射率 (~96.7%).
- 通过31°的接触角度证明了超级水友性,这表明它具有出色的水分管理能力.
- 在阳光下观察到显著的温度下降11.7°C,湿度管理的额外8.9°C降温效应.
- 复合膜表现出显著的阻燃性和抗紫外线的性能.
结论:
- 用盐增强的纤维膜为被动冷却提供了有效的解决方案,具有卓越的热管理.
- 开发的材料显示了在热和潮湿的环境中零能耗冷却应用的潜力.
- 这种方法为创建具有集成冷却,阻燃性和紫外线保护的先进织品提供了新的途径.
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