Hierarchically Patterned Self-Cleaning Polymer Composites for Daytime Radiative Cooling

• DOI: 10.1021/acs.nanolett.2c04069
• Publication Date: 2023-04-20T19:08:18Z
• Authors: Kai Zhou; Xiao Yan; Seung J. Oh; Gabriela Padilla-...; Hyunjung A. Kim; Donald M. Cropek; Nenad Miljkovic; Lili Cai
• Keywords: Nanoporous; Microscale chemistry; Radiative Cooling; Molding (decorative)

Passive daytime radiative cooling (PDRC) has the potential to reduce energy demand and mitigate global warming. However, surface contamination from dust bacterial buildup limits practical PDRC applications. Here, we develop a hierarchically patterned nanoporous composite (HPNC) using facile template-molding fabrication method integrate materials with self-cleaning antibacterial functions. The HPNC design decouples multifunctional control into different characteristic length scales that can be optimized simultaneously. polymer matrix embedded tunable fillers enables 7.8 4.4 °C temperature reduction for outdoor personal building cooling, respectively, under intense solar irradiance. Meanwhile, microscale pillar array pattern integrated superhydrophobicity antisoiling functions contamination. Moreover, coating of photocatalytic agents generate photoinduced effects. scalable capabilities our offer promising solution applications minimal maintenance needs.