双模式天然丝纳米纤维气凝具有多孔层结构,用于高度稳定的辐射冷却和加热
Huiyu Yang1, Rong Chen2, Xiaohua Cheng3
1School of Chemistry and Materials Science, Hubei Engineering University, Xiaogan 43200, China; Key Laboratory for New Textile Materials and Applications of Hubei Province, Wuhan Textile University, Wuhan 430200, China.
International journal of biological macromolecules
|January 25, 2025
概括
这项研究引入了一种新的双模式丝纳米纤维气凝膜,用于被动辐射冷却和加热. 该材料提供高效的温度调节,具有自清洁特性,可实现可持续的热管理.
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:
- 被动辐射冷却和加热是节能热管理策略.
- 阳光吸收和不良绝缘限制了当前材料的性能.
- 开发先进的材料对于增强被动辐射传热至关重要.
研究的目的:
- 开发一个多孔的等级双模式丝纳米纤维气凝 (SNF) 膜.
- 为了实现辐射冷却和加热应用的高机械性和稳定性.
- 通过疏水性修饰和自我清洁性能来提高性能.
主要方法:
- 使用丝纳米纤维和石墨烯氧化物 (GO) 制造SNF薄膜.
- 双模式气凝膜的结构和性能特征.
- 使用FOTS进行疏水改造,用于自清洁和耐久性测试.
主要成果:
- 冷却侧显示低导热率 (0.034 W·m−1·K−1) 和高发射率 (92.7%),实现了9.6°C的环境下冷却.
- 加热侧显示高太阳吸收率 (93.8%) 和低排放率 (11.4%),使空气温度提高了25.5°C.
- 两个月在各种pH溶液中使用后,片保持了出色的性能,证明了耐用性和自我清洁能力.
结论:
- 开发的双模式SNF薄膜提供了高效和可持续的被动辐射冷却和加热.
- 该材料的强度和自我清洁性能使其适合长期户外应用.
- 这项技术在各种环境中具有广泛的辐射热管理的巨大潜力.
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