Nanofiber Production Equipment| A hierarchical nanofiber-sheath engineereddaytime radiative cooling metayarn

Professor Xiaohong Qin’s Team, Donghua University, Nano Energy (IF 16.8): A Hierarchical Nanofiber-Sheath Engineered Daytime Radiative Cooling Metayarn

Challenge: Incorporating radiative cooling photonic structures into textiles offers an eco-friendly solution to mitigate the impact of global climate change on human comfort and health. However, traditional fabrics with fiber diameters in the tens of microns range mismatch solar wavelengths, hindering efficient photon interaction for daytime radiative cooling.
Method: Prof. Xiaohong Qin and Researcher Dongxiao Ji from Donghua University report a cooling metayarn using only comfortable and durable fiber materials. By designing a hierarchical nanofiber sheath around natural fiber yarn cores, traditional yarns gain photonic interactivity compatible with existing textile manufacturing systems.
Innovation 1: The resulting fabric exhibits high infrared emissivity (95%) in the atmospheric window and solar reflectivity (94%), achieving a 226 W/m² cooling power increase and 7.0°C skin temperature reduction compared to commercial fabrics under intense solar exposure.
Innovation 2: The metayarn fabric also features excellent wearability, including flexible color design, stable photonic structures, and satisfactory comfort.
Link: https://doi.org/10.1016/j.nanoen.2025.111150