一种分层的纳米纤维自清洁织品,用于在极端炎热和寒冷环境中有效的个人热管理
Bin Gu1, Qihao Xu1, Hongkui Wang1
1School of Energy and Environment, Southeast University, Nanjing, Jiangsu 210096, China.
ACS nano
|September 13, 2023
概括
一种新的层次纳米纤维 (HNF) 织品提供了无能源的个人热管理. 这种先进的织物在炎热时提供显著的冷却,在寒冷时提供温暖,在极端温度下应对挑战.
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
- 环境科学 环境科学
背景情况:
- 气候变化推动了对户外活动个人热管理解决方案的需求.
- 目前的织品在极端的高温和低温条件下,在没有能源投入的情况下,难以提供有效的温度调节.
- 开发用于被动热控制的先进材料对于人类的舒适和安全至关重要.
研究的目的:
- 制造一个层次的纳米纤维 (HNF) 织品,以在极高的温度下有效地进行个人热管理.
- 将辐射冷却,隔热和辐射加热功能整合到一个织品中.
- 为了评估织品在炎热和寒冷的户外环境中的性能.
主要方法:
- 多层HNF织品的制造,其中包括一个辐射冷却层,一个林氏纤维素气凝膜 (LCAM) 绝缘层和一个辐射加热层.
- 用聚二甲基 (PDMS) 修改辐射冷却层,以提高热发射率和自我清洁性能.
- 将碳纳米管 (CNT) 纳入聚烯二中,用于辐射加热层,以提高太阳吸收率.
- 在户外测试以量化与传统织物相比的温度差异.
主要成果:
- 该LCAM中间层具有较低的导热率 (0.0366W·m-1·K-1),提供了有效的绝缘.
- 经PDMS修改的冷却层在大气窗口内实现了高热发射率 (90.4%).
- 采用CNT增强的加热层显示了显著增加的太阳吸收率 (80.1%).
- 户外测试显示,与对照面料相比,在炎热条件下温度下降7.2°C,在寒冷条件下升温12.2°C.
- 这种HNF织品表现出了出色的水分透性,透气性和定向汗流能力.
结论:
- 开发的HNF织品通过集成的辐射和绝缘功能,在极端炎热和寒冷的环境中有效地控制个人温度.
- 织品为极端气候中个人热管理提供了一个有希望的,节能的解决方案.
- 它的先进特性,包括自清洁和出色的透气性,提高其适合户外应用.
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