Multimodal Super‐Cooling Porous Textiles With Anisotropic Light Scattering for the Dynamic Hygrothermal Comfort Management in Sports Scenarios

Abstract

ABSTRACT Amidst the nationwide fitness craze, people are increasingly concerned about comfort during exercise. Although existing textiles can achieve functions such as moisture management and cooling, it remains challenging to integrate radiation cooling, directional water transport, lightweight design, and sufficient mechanical strength into a single shoe upper. Herein, we proposed a large‐scale preparation strategy for a supercritical reinforced foamed fiber with an enhanced structure and formed a tridimensional textile (RFTT) using tridimensional knitting technology. Based on experimental and simulation results, we reveal the influence of pore morphology, distribution, and interface effects on scattering phenomena, explaining the role of anisotropic scattering mechanisms in radiative cooling capacity. By using multiple nucleation foaming methods to form a hierarchical porous structure that enhances scattering, RFTT achieves a reflectivity of up to 99.4% and a mid‐infrared emissivity of 98.9%. Additionally, RFTT exhibits a net radiative cooling power of 153.2 W m − 2 during daylight hours and 174.5 W m − 2 at night, with an average cooling temperature 7.6°C lower than cotton textiles and 6.3°C lower than PET textiles. Together with its moisture‐transport, cushioning, and durability‐related performance, RFTT provides an upper‐relevant textile architecture for combining radiative cooling and hygrothermal management under dynamic use conditions.