具有核心外架构的超坚固无otropic生物元结构,用于可持续的辐射冷却
Hongtao Liu1,2, Yining Wang2, Wei Sun2
1School of Transportation Science and Engineering, Beihang University (BUAA), Beijing, 100191, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|June 25, 2025
概括
研究人员开发了一种强大,灵活的辐射冷却元织物,其灵感来源于大自然. 这种材料提供了高效的被动冷却,并为可持续的应用提供了出色的耐用性.
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:
- 可扩展的辐射冷却材料对于解决全球过热而无需能源消耗至关重要.
- 目前的材料在应用范围,冷却效率和机械强度方面面临限制,这阻碍了可持续的使用.
研究的目的:
- 开发一种灵活,坚固和坚固的高效辐射冷却元结构 (STRCM).
- 通过模仿自然结构来克服现有的辐射冷却技术的局限性.
主要方法:
- 受白翅膀和蜘蛛丝的启发,设计了一种独特的纤维微结构,具有异性质和核心外结构.
- 评估了机械性能 (抗拉强度,性,冲击能量吸收) 和辐射冷却性能.
- 进行了长期间歇性测试以评估耐用性.
主要成果:
- 该STRCM表现出了显著的机械性能:2.55 MPa的抗拉强度,破裂时726.94%的延长,以及31 MJ m-3的冲击能量吸收.
- 在≈6.7°C的温度下降和≈978 W m-2太阳能强度下的79.0 W m-2冷却功率下,实现了显著的辐射冷却.
- 在长期间歇性测试后,冷却效应没有明显下降.
结论:
- 多层结构设计为提高机械性能和辐射冷却性能提供了有效的策略.
- 开发的STRCM为可持续的,长期的被动冷却应用提供了一个有希望的解决方案.
- 这项工作为设计先进的功能性织品提供了一种新的方法.
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