Automated Electrospinning Equipment| Stretchable ThermoplasticPolyurethane/Boron Nitride NanosheetFabrics with Highly Anisotropic ThermalConductivityforMulti-scenario PassiveRadiative Cooling

Adv. Fiber Mater. (IF 17.2): Stretchable Thermoplastic Polyurethane/Boron Nitride Nanosheet Textile for Multi-Scenario Passive Radiative Cooling

Challenge: Passive radiative cooling textiles with high solar reflectance and mid-infrared emissivity show great promise for personal cooling applications. However, most current designs neglect inherent thermal conductivity, resulting in ineffective heat transfer from human skin to the environment.

Approach: Professor Chun-Tai Liu, Professor Xian-Hu Liu, and Associate Professor Yue-Zhan Feng from Zhengzhou University developed highly anisotropic thermally conductive thermoplastic polyurethane/boron nitride nanosheet (TPU/BNNS) textiles via one-step electrospinning, introducing conductive cooling mechanisms to passive radiative cooling fabrics.

Innovation 1: The high anisotropy enables rapid in-plane heat dissipation while blocking external heat penetration through the thickness direction, achieving effective conductive cooling. Additionally, BNNS incorporation increases solar radiation scattering sites, enhancing the fabric's solar reflectance to 95%.

Innovation 2: Combined with the high emissivity (92.9%) from intrinsic groups of TPU and BNNS, the textile demonstrates superior radiative cooling capability. Through dual passive radiative and conductive cooling effects, the TPU/BNNS fabric achieves 12.4°C sub-ambient cooling and 10.7°C personal cooling.

DOI: https://doi.org/10.1007/s42765-025-00526-9