对聚合物涂层的操纵性孔形成的研究,以在被动白天辐射冷却和加热之间赋予可切换性属性
Pengcheng Cui1, Yi Yan1, Hao Wei1
1Department of Materials Science and Engineering, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.
ACS applied materials & interfaces
|August 9, 2024
概括
一种新的方法创造了成本高效的微孔聚合物涂层,用于被动白天辐射冷却 (PDRC). 这些材料提供可调节的太阳反射率和显著的冷却功率,而无需能源消耗.
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:
- 无源日间辐射冷却 (PDRC) 提供无能源的冷却解决方案.
- 开发具有成本效益的PDRC材料对于广泛采用至关重要.
研究的目的:
- 为PDRC聚合物材料开发一个成本高效的制造方法.
- 为了实现可调节的光学性能和增强的冷却性能.
主要方法:
- 采用了一种新的"逆乳液" - "呼吸图形" (Ie-BF) 方法用于微孔涂层制造.
- 使用水滴作为模板操纵毛孔形成.
- 调整透度和厚度以控制太阳反射率和红外辐射率.
主要成果:
- 实现了可调节的太阳反射率 (21-91%) 和高红外辐射率 (96.3%).
- 证明了125微米的涂层,具有85.4%的太阳反射率,实现6.7°C的环境下冷却.
- 开发了一种可在冷却和加热模式之间切换的复合膜.
结论:
- Ie-BF方法为制造PDRC涂层提供了一种灵活且成本效益高的策略.
- 开发的材料显示了被动冷却应用的巨大潜力.
- 可调节的特性和可切换的功能增强了PDRC技术的多功能性.
相关概念视频
01:19Mechanism of heat transfer
2.3K
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...
2.3K
01:14Mechanisms of Heat Transfer I
5.8K
Just as interesting as the effects of heat transfer on a system are the methods by which the heat transfer occur. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, such as through a cooking pan, or slowly, such as through the walls of a picnic ice box. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet, every heat transfer takes place by only three methods: conduction, convection, and radiation.
5.8K
01:20Mechanisms of Heat Transfer II
4.5K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
4.5K
01:14Mechanisms of Heat Transfer
1.9K
Heat transfer between the human body and its environment occurs through four main mechanisms: conduction, convection, radiation, and evaporation.
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
Conduction, accounting for approximately 3% of body heat loss at rest, is the process of exchanging heat between molecules of two materials in direct contact. This can result in both heat loss and gain. For instance, when the body is submerged in water, which conducts heat 20 times more effectively than air, it can either lose or gain significant...
1.9K