一种环保的双梯度Janus织物用于个人热水管理
Jingna Zhang1, Yangzhe Hou1,2, Chuntai Liu1
1National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.
ACS applied materials & interfaces
|November 14, 2025
概括
这项研究开发了一种由聚乳酸 (PLA) 制成的环保冷却面料,可提供个人热管理. 创新的Janus织物 (JF) 提供辐射冷却和高效的吸汗,在极端天气中提供更好的舒适性.
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
- 可持续的高分子.
背景情况:
- 极端天气事件需要先进的个人热管理解决方案.
- 开发能够有效处理人类汗水的制冷织品是一个重大挑战.
- 聚乳酸 (PLA) 为先进材料制造提供了一种绿色和可生物降解的替代品.
研究的目的:
- 使用PLA制造一个高性能不对称的Janus辐射冷却面料.
- 整合辐射冷却,定向吸汗和单向导热在一个单一的织品.
- 为了评估面料在冷却,汗水管理和佩戴者的舒适性方面的性能.
主要方法:
- 利用连续线过程,从PLA制成一个不对称的Janus织物 (JF).
- 设计了JF,其上层为性水体 (JF-T) 和底层为性水体 (JF-A).
- 标志着织物的太阳反射率,中红外线 (MIR) 发射率,冷却性能和水蒸发率.
主要成果:
- 实现了高太阳反射率 (91.02%) 和MIR发射率 (95.34%) 以有效的辐射冷却.
- 在阳光直射下,其最大环境下降温为7.2°C.
- 呈现出高水蒸发率 (651.88 g m-2 h-1),具有出色的透气性和液体扩散,可快速去除汗水.
结论:
- 开发的 Janus 织物 (JF) 为个人热管理提供了一个可扩展和环保的解决方案.
- 织物的独特结构通过提供高效的冷却和快速吸汗来提高佩戴者的舒适性.
- 这项技术对下一代可穿戴应用在户外热舒适性方面显示出重大前景.
相关概念视频
01:26Thermoregulation
2.2K
The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
2.2K
01:09Thermal Stress
3.2K
If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
3.2K
01:19Mechanism of heat transfer
1.8K
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...
1.8K
01:43Thermosensation
33.6K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
33.6K
01:21Masonry in Cold and Hot Weather Conditions
324
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
Other key practices include keeping masonry units...
324
01:57Adaptations that Reduce Water Loss
27.9K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.9K