Jahid Md Anwar, Hu Jinlian, Thakur Suman
Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China.
ACS Omega. 2020 Feb 17;5(8):3899-3907. doi: 10.1021/acsomega.9b03268. eCollection 2020 Mar 3.
The human body releases heat via four mechanisms: conduction, convection, evaporation, and radiation. The normal core temperature of the human body is around 37 °C, and metabolism may be negatively affected and enzymes/proteins may be destroyed if the core temperature rises above 45 °C. To prevent such overheating, we developed an evaporative-radiative-convective fabric which can control the personal microclimate of the human body through a cooling mechanism (evaporation of perspiration, air convection, and emission of heat radiation directly into the environment). In this work, we fabricated a thermo-moisture sensitive polyurethane/silica aerogel composite membrane which showed super evaporative and radiative effects and which can facilitate the convection process in the human body. We also fabricated a sensitive membrane-based textile which can cool down the human body by releasing body heat. The developed material possessed robust mechanical properties for the longevity of the material, high water-evaporative ability, and air permeability to provide comfort to the wearer. Microclimate-controlled clothing can release most of our body heat to the environment.
传导、对流、蒸发和辐射。人体正常核心温度约为37°C，如果核心温度升至45°C以上，新陈代谢可能会受到负面影响，酶/蛋白质可能会被破坏。为防止此类过热情况，我们开发了一种蒸发-辐射-对流织物，它可以通过冷却机制（汗液蒸发、空气对流以及直接向环境发射热辐射）来控制人体的微气候。在这项工作中，我们制备了一种对热湿敏感的聚氨酯/二氧化硅气凝胶复合膜，它具有超强的蒸发和辐射效果，并且能够促进人体的对流过程。我们还制备了一种基于敏感膜的纺织品，它可以通过散发人体热量来为人体降温。所开发的材料具有强健的机械性能以保证材料的耐用性、高水蒸发能力和透气性，从而为穿着者提供舒适感。微气候可控服装能够将我们身体的大部分热量散发到环境中。
