Cool White Polymer Coatings based on Glass Bubbles for Buildings
Cool White Polymer Coatings based on Glass Bubbles for Buildings
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DOI：
10.1038/s41598-020-63027-2
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发表时间：
2020-04-20
影响因子：
4.6
通讯作者：
Lee, Jaeho
中科院分区：
文献类型：
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作者：
Nie, Xiao;Yoo, Youngjae;Lee, Jaeho
虽然大多数选择性发射体材料不足以或不适合建筑应用，但在这里，我们通过将玻璃泡集成在聚合物膜内来提出一种技术经济上可行的光学涂层。从0到70%的受控玻璃泡体积浓度导致选择性太阳反射率从0.06增加到0.92，而中红外发射率保持在0.85以上。室外测量表明，当传导和对流受到限制时，混凝土表面上的聚合物涂层可以在白天提供高达25摄氏度的温度降低，并且净冷却功率大于78 W/m（2），成本低于0.005美元/W。聚合物涂层对普通建筑物的影响估计为潜在的年节能2-12 MJ/m2和CO2减排0.3-1.5kg/m2。预计表面积与体积比更高的建筑物将节省更多的费用，聚合物涂层也有望解决没有空调的旧建筑物的冷却问题。
While most selective emitter materials are inadequate or inappropriate for building applications, here we present a techno-economically viable optical coating by integrating glass bubbles within a polymer film. A controlled glass bubble volume concentration from 0 to 70% leads to a selective solar reflectivity increase from 0.06 to 0.92 while the mid-infrared emissivity remains above 0.85. Outdoor measurements show the polymer coating on a concrete surface can provide a temperature reduction up to 25 degrees C during the day when conduction and convection are limited and a net cooling power greater than 78W/m(2) at a cost less than $0.005/W. The impact of polymer coating on common buildings is estimated as potential annual energy savings of 2-12 MJ/m(2) and CO2 emission savings of 0.3-1.5kg/m(2). More savings are expected for higher surface-area-to-volume-ratio buildings, and the polymer coating is also expected to resolve cooling issues for old buildings with no air conditioning.