Yu Shixiong, Zhang Quan, Liu Lili, Ma Rujun
School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tongyan Road 38, Tianjin 300350, China.
ACS Nano. 2023 Oct 24;17(20):20299-20307. doi: 10.1021/acsnano.3c06289. Epub 2023 Oct 13.
Thermal management textiles provide an energy-efficient strategy for personal thermal comfort by regulating heat flow between the human body and the environment. However, textiles with a single heating or cooling mode cannot realize temperature regulation under dynamic weather. Furthermore, monocolor textiles do not satisfy aesthetic requirements in a garment. Here, we develop a thermochromic (TC) conductive fiber with a coaxial structure composed of a conductive core and thermochromic shell. The TC conductive fiber-woven fabric has the ability of low-energy dynamic thermal management by combining Joule heating and modulation of solar absorption. Compared with commercial white fabrics, TC conductive fabrics exhibit a maximum temperature drop of 2.5 K, while the temperature of colored commercial fabrics is 7.5-16 K higher than that of commercial white fabrics in the hot. In the cold, the combination of Joule heating and the photothermal effect can provide desired thermal comfort for humans. Meanwhile, heat obtained from solar absorption brings the temperature of a fabric to a predetermined level, which saves energy of 625 W/m compared to a conductive-fiber-based textile. In addition, TC conductive fabrics with trichromatic evolution provide a sensitive and instant temperature visualization capable of identification of invisible and intense infrared radiation. These results provide another path to expand potential applications of wearable, flexible electronics.
热管理纺织品通过调节人体与环境之间的热流，为个人热舒适性提供了一种节能策略。然而，具有单一加热或冷却模式的纺织品在动态天气下无法实现温度调节。此外，单色纺织品不能满足服装的美学要求。在此，我们开发了一种具有同轴结构的热致变色（TC）导电纤维，其由导电芯和热致变色壳组成。TC导电纤维织物通过结合焦耳热和太阳能吸收调制，具有低能量动态热管理能力。与商用白色织物相比，TC导电织物的最大温度降幅为2.5K，而在炎热环境中，有色商用织物的温度比商用白色织物高7.5 - 16K。在寒冷环境中，焦耳热和光热效应的结合可为人体提供所需的热舒适性。同时，从太阳能吸收获得的热量将织物温度提升至预定水平，与基于导电纤维的纺织品相比，可节省625W/m的能量。此外，具有三色演变的TC导电织物提供了一种灵敏且即时的温度可视化功能，能够识别不可见的强红外辐射。这些结果为扩展可穿戴、柔性电子产品的潜在应用提供了另一条途径。
