标题： 水分捕获水凝胶中的内在水分传输 显示英文标题

标题： Intrinsic water transport in moisture-capturing hydrogels

摘要： 吸湿性水凝胶作为一种能够将环境湿度转化为液态水的有吸引力的吸附材料已经出现。最近的研究已经证明了水凝胶卓越的吸水能力，同时也在探索不同的策略以加速水的捕获和释放。然而，在材料层面，目前缺乏对吸湿性水凝胶固有传输特性的理解，这阻碍了它们的合理设计。在本工作中，我们将宏观水凝胶样品在纯蒸汽中的吸收和解吸实验与水凝胶中水扩散的模型相结合，展示了水凝胶-盐复合材料中固有水扩散系数的首次测量。基于这些见解，我们通过微孔图案化水凝胶，分别将所需的吸收和解吸时间减少了19%和72%，而仅将水凝胶的总水容量减少了4%。从而，我们提供了一种有效的水凝胶材料优化策略，尤其在纯蒸汽环境中具有重要意义。 显示英文摘要

摘要： Moisture-capturing hydrogels have emerged as attractive sorbent materials capable of converting ambient humidity into liquid water. Recent works have demonstrated exceptional water capture capabilities of hydrogels, while simultaneously, exploring different strategies to accelerate water capture and release. However, on the material level, an understanding of the intrinsic transport properties of moisture-capturing hydrogels is currently missing, which hinders their rational design. In this work, we combine absorption and desorption experiments of macroscopic hydrogel samples in pure-vapor with models of water diffusion in the hydrogels to demonstrate the first measurements of the intrinsic water diffusion coefficient in hydrogel-salt composites. Based on these insights, we pattern hydrogels with micropores to significantly decrease the required absorption and desorption time by 19% and 72%, respectively, while reducing the total water capacity of the hydrogel by only 4%. Thereby, we provide an effective strategy towards hydrogel material optimization, with a particular significance in pure-vapor environments.