热绝缘纤维素/木用于被动辐射冷却
Peipei Wang1, Luxin Fang2, Shihao Wang2
1School of Material Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
International journal of biological macromolecules
|January 5, 2025
概括
研究人员开发了一种可持续的纤维素/木片复合泡 (CWF),用于高效的被动冷却. 这种环保材料具有很高的反射率和排放性,减少了建筑物的能源消耗和二氧化碳排放.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续工程 可持续工程
- 热管理 热管理
背景情况:
- 被动冷却对于节能建筑和减少碳足迹至关重要.
- 传统的冷却方法是能源密集型的,有助于温室气体排放.
- 开发用于被动冷却的可持续材料是关键的研究领域.
研究的目的:
- 创建一种新的纤维素/木片复合泡 (CWF),用于高效的被动冷却应用.
- 研究开发的CWF的光学和热性质.
- 评估CWF作为可持续建筑材料的潜力.
主要方法:
- 采用结造策略,以准备具有异型多孔结构的CWF.
- 通过UV到NIR和大气透明窗户测量了光学性能 (反射率和发射率).
- 理论冷却功率是根据材料的性能计算出来的.
- 应用了疏水涂层,以提高防潮性和反射性.
主要成果:
- 在UV到NIR范围内 (0.2-2.5μm),CWF显示出高的平均反射率 (95.2%).
- 在大气透明窗口 (8-13μm) 中,CWF显示出高平均发射率 (94.8%).
- 理论冷却功率达到了大约130W/m2,表明了显著的被动冷却潜力.
- 疏水涂层提高了防潮性,并进一步提高了反射性.
结论:
- 开发的纤维素/木片复合泡 (CWF) 是一种高效和可持续的被动冷却材料.
- 它的特性使其适用于建筑材料,有助于接近零的能源消耗和减少二氧化碳排放.
- 使用天然聚合物和森林废物为被动冷却技术提供了低成本和环保的解决方案.
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