基于水运输和汗流的适应性热保护皮肤,用于极速冷却应用
Yumeng Dai1, Zhao Xu2, Yiyao Liu1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
ACS applied materials & interfaces
|February 28, 2025
概括
这项研究介绍了一种灵感来自人类汗腺的适应性热保护皮肤. 这种新型系统提供了高可变形性和快速冷却,在极端高温环境中提高了安全性.
科学领域:
- 材料科学 材料科学 材料科学
- 生物模拟学是一种生物模拟学.
- 热力工程是热力工程中的一个.
背景情况:
- 灵活的热保护系统对于人类和航天器的安全至关重要,但在极端高温下实现高可变形性和快速冷却仍然是一个挑战.
- 现有的系统与强烈的化学火灾或空气动力加热作斗争,需要创新的解决方案.
研究的目的:
- 开发一种适应性的双层热保护皮肤,灵感来自人类汗腺.
- 为了实现高可变形性和快速冷却能力,以防止极端高温.
主要方法:
- 开发了一种两层系统:内部空洞的多孔热塑性聚氨/聚乙烯 (TPU/PVC) 纤维用于水运输,外部聚乙烯四甲 (PET) 间隔面料用于储水和透气.
- 优化TPU/PVC空心纤维的超性,高孔性 (79%) 和可变性 (303%).
- 适应性热保护皮肤在高热流下对双轴变形性 (150%) 和冷却性能 (420 kW/m2) 的评估.
- 使用有限元模拟来确定最佳的间隔布厚 (9毫米) 以快速降低温度.
主要成果:
- 开发的适应性热保护皮肤 (厚度5毫米) 显示出优异的双轴变形性 (150%),在420千瓦/平方米的热流下,在1秒内达到舒适的温度 (46°C).
- 优化的TPU/PVC空心纤维呈现出高孔度 (79%) 和显著的可变性 (303%).
- 有限元模拟表明,9毫米厚的间隔面料可以在0.7秒内将1000°C的表面温度降低到20°C.
结论:
- 灵感来自生物系统的新型适应性热保护皮肤,为快速冷却和保护提供了有前途的解决方案.
- 该系统的高可变形性和高效散热使其适用于涉及人体,机器人和太空船在极端热环境中的应用.
- 这项研究为在苛刻条件下先进的热管理解决方案铺平了道路.
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