多功能冷却织品,通过一阶段分离进行增强的辐射和湿度管理
Xiaorong Yang1, Wenjie Qu2, Wangshu Tong1,3
1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, China.
ACS applied materials & interfaces
|May 14, 2025
概括
研究人员开发了一种新型的冷却织品,具有辐射冷却和单向的湿度传递. 这种面料提供了显著的个人热管理,在阳光下降8.7°C的体温.
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:
- 全球变暖需要先进的个人热管理解决方案.
- 开发具有辐射冷却和湿度传输的织品是一项挑战.
- 高温条件需要在织品中有效调节热量和湿度.
研究的目的:
- 开发一个辐射冷却和单向吸湿的织品 (RCUM-织品).
- 通过简单的,单步相隔制造方法来实现这一目标.
- 整合辐射冷却和有效的汗水蒸发,以提高热舒适度.
主要方法:
- 使用蒸发诱导的相分离 (EIPS) 和非溶剂诱导的相分离 (NIPS).
- 创建了一个三层结构,其中有一个疏水性SiO2 / PVDF-HFP上层和一个疏水性棉花下层.
- 应用SiO2 / PVDF-HFP溶液作为棉花加工剂,以简化功能化.
主要成果:
- 实现了高太阳反射率 (89.7%) 和中红外辐射率 (94.9%).
- 在直接阳光下显示出8.7°C的显著冷却效应.
- 观察到增强的汗水蒸发率 (0.029 g·m−2·s−1) 和减少的蒸发度 (2084 J/g).
结论:
- 在RCUM-织品提供有效的辐射冷却和高效的湿度管理.
- 一步制造方法具有成本效益,并简化了织品的功能化.
- 开发的织品在个人冷却,可穿戴电子产品和工业系统中具有潜在的应用.
相关概念视频
01:19Mechanism of heat transfer
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...
01:20Mechanisms of Heat Transfer II
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...
01:14Mechanisms of Heat Transfer
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 heat.
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 heat.