Abstract：
Directional sweat-wicking by Janus fabrics has gained substantial attention in promoting personal wet-thermal management for optimal human comfort. During intense physical exercise, excessive sweating can cause the flooding of fabrics and weaken their wicking capabilities once the inner capillary channels are saturated. To address this issue, we develop a photothermal Janus fabric through a facile polydopamine (PDA) deposition followed by single-sided spray-coating of hydrophobic polydimethylsiloxane (PDMS). Such innovative fabrics enable directional sweat-wicking through a Janus structure and persistent removal of excessive sweat by solar-powered evaporation. Under sunlight, our photothermal Janus fabrics exhibit an enhanced evaporation rate, approximately twice compared with that of conventional Janus fabrics (∼1.143 ± 0.027 kg m-2h-1), making them suitable for high sweating rates during vigorous exercise. Furthermore, these fabrics help to maintain the skin temperature within the normal range, preventing hypothermia caused by profuse sweating. In addition, our photothermal Janus fabrics exhibit excellent washing durability even after multiple washing cycles, ensuring prolonged performance and safety.
摘要：
Janus织物的定向排汗在促进个人湿热管理以实现最佳人体舒适度方面获得了极大的关注。在激烈的体育锻炼中，一旦内部毛细管通道饱和，过多的出汗会导致织物泛滥并削弱其芯吸能力。为了解决这个问题，我们通过简单的聚多巴胺（PDA）沉积，然后单面喷涂疏水性聚二甲基硅氧烷（PDMS）来开发光热Janus织物。这种创新的织物能够通过Janus结构定向排汗，并通过太阳能蒸发持续去除过多的汗水。在阳光下，我们的光热Janus织物表现出增强的蒸发率，与常规Janus织物相比约为两倍（〜1.143±0.027kgm-2h-1），使它们适合在剧烈运动时出汗率高。此外，这些织物有助于保持皮肤温度在正常范围内，防止大量出汗引起的体温过低。此外,我们的光热Janus织物即使在多个洗涤周期后也表现出优异的洗涤耐久性，确保长期的性能和安全。
