Thermal and Moisture Managing E‐Textiles Enabled by Janus Hierarchical Gradient Honeycombs

Abstract Moisture and thermal comfort are critical for long‐term wear. In recent years, there has been rapidly growing attention on the importance of the comfortability in wearable electronic textiles (e‐textiles), particularly in fields such as health monitoring, sports training, medical diagnosis and treatment, where long‐term comfort is crucial. Nonetheless, simultaneously regulating thermal and moisture comfort for the human body without compromising electronic performance remains a significant challenge to date. Herein, a thermal and moisture managing e‐textile (TMME‐textile) that integrates unidirectional water transport and daytime radiative cooling properties with highly sensitive sensing performance is developed. The TMME‐textile is made by patterning sensing electrodes on rationally designed Janus hierarchical gradient honeycombs that offer wetting gradient and optical management. The TMME‐textile can unidirectionally pump excessive sweat, providing a dry and comfortable microenvironment for users. Moreover, it possesses high solar reflectivity (98.3%) and mid‐infrared emissivity (89.2%), which reduce skin temperature by ≈7.0 °C under a solar intensity of 1 kW m −2 . The TMME‐textile‐based strain sensor displays high sensitivity (0.1749 kPa −1 ) and rapid response rate (170 ms), effectively enabling smooth long‐term monitoring, especially during high‐intensity outdoor sports where thermal and moisture stresses are prominent challenges to conventional e‐textiles.