Sui Jiayi, Jiang Shoukun, Peng Jinhao, Kang Zhanxiao, Fan Jintu
School of Fashion and Textiles, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, China.
Research Centre of Textiles for Future Fashion, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, 999077, China.
Adv Sci (Weinh). 2025 Feb;12(8):e2412448. doi: 10.1002/advs.202412448. Epub 2025 Jan 7.
Acting as the interface between the human body and its environment, clothing is indispensable in human thermoregulation and even survival under extreme environmental conditions. Development of clothing textiles with prolonged passive temperature-adaptive thermoregulation without external energy consumption is much needed for protection from thermal stress and energy saving, but very challenging. Here, a temperature-adaptive thermoregulation filament (TATF) consisting of thermoresponsive vacuum cavities formed by the temperature-responsive volume change of the material confined in the cellular cores of the filament is proposed. Using a droplet-based microfluidic system, the cellular core/sheath filament using octadecane (OD) as a temperature-responsive volume-changing material to form droplet cellular cores within the thermoplastic polyurethane (TPU) sheath is fabricated. It is found that the fabric made of TATF has a remarkable temperature adaptive thermal conductivity, which increases by 83% as the mean fabric temperature increases from 20 °C to 35 °C, due to the volume change of vacuum cavities in the cellular cores of the filament in response to temperature. TATF fabrics have no problem associated with undesirable appearance changes or leakage of encapsulated molten materials as some existing thermoregulatory textiles do, and can therefore have wide applications in functional clothing for prolonged passive personal thermal management.
作为人体与其环境之间的界面，衣物在人体体温调节中不可或缺，甚至在极端环境条件下对生存也至关重要。开发无需外部能量消耗即可实现长时间被动温度自适应调节的服装纺织品，对于抵御热应激和节能而言十分必要，但极具挑战性。在此，我们提出了一种温度自适应调节长丝（TATF），它由热响应性真空腔构成，这些真空腔是由限制在长丝细胞芯中的材料的温度响应性体积变化形成的。利用基于液滴的微流控系统，制备了以十八烷（OD）作为温度响应性体积变化材料的细胞芯/鞘长丝，使其在热塑性聚氨酯（TPU）鞘内形成液滴状细胞芯。研究发现，由TATF制成的织物具有显著的温度自适应热导率，当织物平均温度从20℃升高到35℃时，热导率增加83%，这是由于长丝细胞芯中的真空腔因温度变化而发生体积变化所致。与一些现有的温度调节纺织品不同，TATF织物不存在外观变化不良或封装的熔融材料泄漏等问题，因此可广泛应用于功能性服装，实现长时间的被动个人热管理。
