A Passive Sweat-Responsive Thermoregulatory Textile with the Largest Thermal Comfort Zone

作者：Xueyang Wang, Xiran Du, Duo Xu, Tianqi Wei, Qian Zhang, Zipeng Chen, Desheng Kong, Kai Wei, Lin Zhou, Bin Zhu, Weilin Xu, Jia Zhu · 发表于：ACS Nano · 年份：2025 · DOI：10.1021/acsnano.5c03236 · 被引用次数：23 · 研究领域：Thermal Radiation and Cooling Technologies、Urban Heat Island Mitigation、Building Energy and Comfort Optimization

Maintaining the human body temperature within the thermally comfortable range under volatile temperatures and environments is critical from both the perspectives of human health and energy saving. Therefore, developing thermoregulatory textiles that have a large comfort zone in response to complex environmental temperature changes has been persistently pursued. Here, we demonstrate that a passive sweat-responsive thermoregulatory (PSRT) textile, composed of a unidirectional liquid-transported polycaprolactam (PA6)/metal bilayer, can tune mid-infrared (MIR) radiation and sweat evaporation simultaneously, thus achieving a substantial expansion of the thermal comfort zone in response to dynamic conditions. Specifically, for heating mode, the metalized bilayer PSRT textile intrinsically possesses low emissivity (ε MIR ∼0.233) for excellent radiative heating. As the environmental temperature increases or during heavy exercise, sweat secretion by the skin increases rapidly, which triggers the autonomous switch to the cooling mode. Sweat rapidly transports to the top PA6 layer, facilitating rapid evaporation through the unidirectional liquid transport design; meanwhile, the PSRT textile automatically switches from low emissivity to high emissivity (ε MIR ∼0.955) for radiative cooling. As a result, this PSRT textile expands the thermal comfort zone by 24.7 °C (8.3–33.0 °C), setting a performance record among passive thermoregulatory textiles. It is expected that the further advanceme...