Surface-engineered PVDF-HFP/BNNS micro-nano fibers enable high-performance radiative cooling through synergistic photon scattering

solar irradiation. Remarkably, the PHB fabric maintains 92% reflectivity after extended ultraviolet exposure (60 days) and repeated laundering (100 cycles), outperforming conventional cooling textiles. The inherent hydrophobicity of PVDF-HFP further endows PHB-4% with antifouling capabilities and contamination resistance. Besides, the evaluation of basic properties confirms preserved flexibility, adequate breathability, and sufficient mechanical durability for wearable applications. This multifunctional cooling textile platform establishes new possibilities for sustainable personal thermal regulation and energy-efficient outdoor thermal management systems.