Personal thermal management is emerging as a promising strategy to provide thermal comfort for the human body while conserving energy. By improving control over the heat dissipating from the human body, personal thermal management can provide effective personal cooling and warming. Here, we propose a facile surface modification approach to tailor the thermal conduction and radiation properties based on commercially available fabrics, to realize better management of the whole heat transport pathway from the human body to the ambient. A bifunctional asymmetric fabric (BAF) offering both a cooling and a warming effect is demonstrated. Due to the advantages of roughness asymmetry and surface modification, the BAF demonstrates an effective cooling effect through enhanced heat conduction and radiation in the cooling mode; in the warming mode, heat dissipation along both routes is reduced for personal warming. As a result, a 4.6 °C skin temperature difference is measured between the cooling and warming BAF modes, indicating that the thermal comfort zone of the human body can be enlarged with one piece of BAF clothing. We expect this work to present new insights for the design of personal thermal management textiles as well as a novel solution for the facile modification of available fabrics for both personal cooling and warming.

个人热管理正在成为一种很有前途的策略，可以在为人体提供热舒适的同时节约能源。通过改进对人体散热的控制，个人热管理可以提供有效的个人冷却和加热。在这里，我们提出了一种简便的表面改性方法，以基于商用织物定制热传导和辐射特性，以实现更好地管理从人体到环境的整个热传输路径。展示了一种具有凉爽和温暖效果的双功能不对称织物 (BAF)。由于粗糙度不对称和表面改性的优点，BAF在冷却模式下通过增强的热传导和辐射表现出有效的冷却效果；在加热模式下，减少沿两条路线的散热以供个人取暖。结果，在冷却和加热 BAF 模式之间测量到 4.6°C 的皮肤温差，表明一件 BAF 服装可以扩大人体的热舒适区。我们希望这项工作能够为个人热管理纺织品的设计提供新的见解，以及一种新颖的解决方案，用于轻松修改用于个人冷却和取暖的可用织物。