Yu Jeehoon, Kwon Daeyul, Jeon Heegyeom, Yoo Youngjae
Department of Advanced Materials Engineering, Chung-Ang University, Anseong 17546, Republic of Korea.
Polymers (Basel). 2024 Jun 9;16(12):1636. doi: 10.3390/polym16121636.
This study presents significant advancements in passive radiative cooling (PRC), achieved using assembled hollow yttrium oxide spherical particles (AHYOSPs). We developed PRC films with enhanced optical properties by synthesizing micro-sized hollow YO particles and integrating them into a polydimethylsiloxane (PDMS) matrix. The findings revealed that AHYOSPs achieved a remarkable solar reflectance of 73.72% and an emissivity of 91.75%, significantly outperforming nano-sized yttrium oxide (NYO) and baseline PDMS. Field tests demonstrated that the AHYOSPs maintained their lowest temperature during daylight, confirming their superior cooling efficiency. Additionally, theoretical calculations using MATLAB indicated that the cooling capacity of AHYOSPs reached 103.77 W/m, representing a substantial improvement over NYO and robustly validating the proposed nanoparticle assembly strategy. These results highlight the potential of structurally controlled particles to revolutionize PRC technologies, thereby offering a path toward more energy-efficient and environmentally friendly cooling solutions.
本研究展示了利用组装的空心氧化钇球形颗粒（AHYOSP）在被动辐射冷却（PRC）方面取得的重大进展。我们通过合成微米尺寸的空心YO颗粒并将其整合到聚二甲基硅氧烷（PDMS）基质中，开发出了具有增强光学性能的PRC薄膜。研究结果表明，AHYOSP实现了73.72%的显著太阳反射率和91.75%的发射率，明显优于纳米尺寸的氧化钇（NYO）和基线PDMS。现场测试表明，AHYOSP在白天保持最低温度，证实了其卓越的冷却效率。此外，使用MATLAB进行的理论计算表明，AHYOSP的冷却能力达到103.77 W/m，相较于NYO有显著提高，并有力地验证了所提出的纳米颗粒组装策略。这些结果凸显了结构可控颗粒在革新PRC技术方面的潜力，从而为实现更节能、更环保的冷却解决方案提供了一条途径。
