| 초록 |
The rapid increase in annual cooling energy demand is having a significant adverse effect upon global warming. To resolve the indiscriminate use of energy, many researchers believe that global energy consumption can be significantly reduced by passive radiative cooling (PRC) without any electricity input. In the present study, the preparation of an eco-friendly polymer structure for effective radiative cooling. The biodegradable polylactic acid (PLA) is environmentally benign with respect to end-of-life disposal. Moreover, the hierarchically porous PLA with major and minor pores exhibits a solar reflectivity of 0.91 and an emissivity of 0.92 within the atmospheric window. In addition, a radiative cooling power of 99.03 W m-2 is achieved under direct sunlight along with passive cooling of as much as 9 °C below the ambient temperature. The present work provides an ideal passive radiative cooling strategy for creating environmentally-friendly cooler with reduced energy consumption. |
