Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA.
E. L. Ginzton Laboratory, Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA.
Science. 2016 Sep 2;353(6303):1019-1023. doi: 10.1126/science.aaf5471.
Thermal management through personal heating and cooling is a strategy by which to expand indoor temperature setpoint range for large energy saving. We show that nanoporous polyethylene (nanoPE) is transparent to mid-infrared human body radiation but opaque to visible light because of the pore size distribution (50 to 1000 nanometers). We processed the material to develop a textile that promotes effective radiative cooling while still having sufficient air permeability, water-wicking rate, and mechanical strength for wearability. We developed a device to simulate skin temperature that shows temperatures 2.7° and 2.0°C lower when covered with nanoPE cloth and with processed nanoPE cloth, respectively, than when covered with cotton. Our processed nanoPE is an effective and scalable textile for personal thermal management.
通过个人加热和冷却进行热管理是一种扩大室内温度设定范围以实现大规模节能的策略。我们发现，由于孔径分布（50 至 1000 纳米），纳米多孔聚乙烯（nanoPE）对中红外人体辐射是透明的，但对可见光却是不透明的。我们对这种材料进行了处理，开发出一种纺织品，在保持足够的透气性、吸水性和机械强度以实现穿着舒适性的同时，促进有效的辐射冷却。我们开发了一种模拟皮肤温度的装置，结果表明，当用 nanoPE 布和处理后的 nanoPE 布覆盖时，分别比用棉覆盖时低 2.7°C 和 2.0°C。我们的处理后的 nanoPE 是一种有效且可扩展的个人热管理纺织品。
