一种双模式的自清洁膜,用于持久的被动辐射冷却和太阳能加热
Tingni Wu1, Kai Yin1,2,3, Yuchun He1
1Hunan Key Laboratory of Nanophotonics and Devices, School of Physics, Central South University, Changsha 410083, China. kaiyin@csu.edu.cn.
Materials horizons
|August 15, 2025
概括
一种新的双模式热管理膜提供太阳能加热和辐射冷却. 这种创新材料为能源效率提供了被动温度调节,克服了单模式设备的局限性.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续能源 可持续能源
背景情况:
- 传统的太阳能加热和辐射冷却技术由于单模式运行和污染,其性能受到限制.
- 开发先进的材料对于有效的被动温度调节和减少对化石燃料的依赖至关重要.
研究的目的:
- 开发一种超疏水,双模式的热管理膜,能够同时进行加热和冷却.
- 研究材料在不同环境条件下的性能及其对能源效率的潜力.
主要方法:
- 使用五秒激光的一步方法制造双模式膜,以创建微纳米结构.
- 可见光反射率和红外发射率的冷却侧 (CS) 的表征.
- 在太阳辐射下评估加热侧 (HS) 的太阳吸收和温度升高.
主要成果:
- 冷却侧实现了5.9°C的冷却效果,可见光反射率为87%,红外辐射率为95%.
- 加热侧显示了98%的太阳吸收,导致一个太阳强度下温度上升40°C.
- 该膜表现出优异的超性 (接触角度>155°),自清洁性能和化学稳定性.
结论:
- 开发的双模式热管理膜为被动温度调节提供了一个有前途的解决方案.
- 它的联合加热和冷却能力以及自清洁特性为节能建筑和设备提供了巨大的潜力.
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