Super hygroscopic nanofibrous membrane-based moisture pump for solar-driven indoor dehumidification

摘要

– Natural wood obtained from a tree trunk contains special structures with horizontal hierarchical cellular networks and vertical interconnected channels that help pump and transport water up from the ground through transpiration. The macro morphology of biomimetic PAN/MIL NFM with a wood-like cellular network structure. The inset shows a high-magnification SEM image of a single cell in the PAN/MIL NFM. Schematic illustration of the fabrication of biomimetic bilayer PML-PC NFM. The PAN/CB nanofibers were directly electrospun on the multilayer wood-like cellular network substrate of the PAN/MIL@LiCl nanofibers. The middle inset shows the developed bilayer NFM. Schematic structures of the moisture-permeable bilayer NFM and proposed moisture transport path under sunlight illumination. The absorbed water molecules are transported outdoors by passing through the desiccant layer and photothermal layer.