The water transport in hydrogel has been proven to be critical for water evaporation, water treatment and moisture-wicking. However, confined with the regulation of pore structure, challenges remain in constructing fast water transport channels especially in harsh water environment. Herein, we demonstrate a simple strategy for fabrication of fast water transport carbon nanotube/poly (vinyl alcohol) (CNT/PVA) hydrogels via efficiently interior infiltration and decoration of CNT cellular structures with PVA. The CNT/PVA double-network structures favor the generation of hierarchical micro/nanochannels and strong capillary forces, leading to water transport throughout the hydrogel up to ~15.8 g g⁻¹s⁻¹, recorded highest among reported hydrogels. The as-formed elastic hybrid hydrogels present a reversible absorbing/shrinking behavior, an excellent capacity in water absorption (216 g g⁻¹), and high adaptability in salty water, acid and alkaline solutions as well as boiling water. Moreover, a multifunctional sport headband has been designed based on fast water transport and conductive framework, which can perform fantabulous moisture-wicking and health monitor. This work proposes a new route for developing fast water transport hydrogels towards versatile flexible electronic devices and multifunctional sport management systems.

水凝胶中的水传输已被证明对于水的蒸发，水处理和吸湿排汗至关重要。然而，受限于孔结构的调节，特别是在恶劣的水环境中，构造快速的水输送通道仍然存在挑战。在这里，我们演示了通过有效的内部渗透和PVA对CNT细胞结构的装饰来制造快速水传输碳纳米管/聚乙烯醇（CNT / PVA）水凝胶的简单策略。CNT / PVA双网络结构有利于产生分层的微/纳米通道和强大的毛细管力，从而导致水在整个水凝胶中的传输量高达〜15.8 g g ^-1 s ^-1，在报道的水凝胶中记录最高。形成的弹性杂化水凝胶表现出可逆的吸收/收缩行为，极佳的吸水能力（216 g g ^-1），并且在咸水，酸和碱溶液以及沸水中具有很高的适应性。此外，基于快速水传输和导电框架设计了多功能运动头带，可以执行奇特的吸湿排汗和健康监测。这项工作提出了一条开发快速水传输水凝胶的新途径，以朝着多功能柔性电子设备和多功能运动管理系统发展。