<scp>UV</scp> ‐Resistant and Antierosion <scp>TPU</scp> Nanocomposite Films for Wind Turbine Blade Protection in Desert Environments

ABSTRACT Thermoplastic polyurethane (TPU), with high strength and elasticity, is widely used in wind turbine blade protection. However, it struggles to resist particle erosion and UV aging in desert environments. In this study, UV‐327 (A), UV‐531 (B), and HALS622 (M) were combined to prepare UV‐resistant UV‐TPU/NW (ABM) film. The three anti‐UV agents cover the main wavelengths, forming a three‐dimensional protective network of “UV absorption, free radical scavenging, and cyclic regeneration.” ABM film shows tensile strength 39.71 MPa and elongation 935.48%, comparable to pure TPU (39.52 MPa, 939.58%). After 10 days of UV aging, the color difference (ΔE) and yellowness index (ΔYI) of ABM are 12.88 and 24.25, respectively, significantly lower than those of pure TPU (ΔE = 24.74, ΔYI = 47.69). After 20 days of UV aging, ABM film only has a few fine cracks on the surface, and the tensile strength and elongation at break remain at 31.50 MPa and 868.35%, respectively, much higher than those of pure TPU (17.66 MPa, 706.53%), with a low erosion rate of 1.52% (pure TPU 2.67%). Meanwhile, UV‐TPU/(NW@G/C 1.0 ) electrothermal film based on ABM maintains a steady‐state temperature of 81.16°C under 11 V after 20 days of aging. This demonstrates its potential for anti‐icing applications on wind turbine blades.