Scalable fabrication of PVDF/SiO2-PTFE fiber membrane for effective daytime radiative cooling

Passive radiative cooling technology could effectively reduce global energy consumption and maintain the global ecological balance. It plays an important role in human thermal management. Here, we proposed a facile, low-cost, and scalable approach for fabricating a hierarchical-morphology fiber membrane with excellent radiative cooling performance. The multilayer fiber membrane was comprised of Polyvinylidene fluoride/Silica (PVDF/SiO2) fiber membrane and Polytetrafluoroethylene (PTFE) clothing film. We demonstrated that the 30% PVDF/SiO2-PTFE fiber membrane (PFM) can achieve radiative cooling up to 9.2 °C lower than that of the bare simulated human skin under a clear sky. The hierarchical-morphology fiber membrane is effective for energy-saving personal thermal management by combining sky radiative cooling and paves a sustainable way for passive radiative cooling textiles, smart clothing and intelligent fabrics.