Polysaccharides-based ultra-thin membrane with high haze, conductivity, and recyclability

The development of a natural polysaccharide-based nanofiber membrane to satisfy the requirements of slight, tenuous, and multi-performance is of great significance but still challenging. Herein, we exemplified a simple yet general strategy combining electrospinning to engineer conventional nanofiber membrane containing poly(vinyl alcohol), plant polysaccharide, and glycerol, scaling up visibility and keeping haze by soaking in deep eutectic solvent (DES) in the wake of noticeable variation of fiber morphology. The high optical haze (up to 92% at 550 nm) membrane with a great tensile stress of 2.5 MPa is a degradable and recyclable green material. The ultrathin membrane (0.1 mm) achieved health monitoring with a rapid response time of 2 s due to the conductivity of DES (choline chloride and urea). In addition, the DES fully expresses that not only the degradation of nanofiber membrane belongs to nature, but also urea could be utilized as fertilizer for heterogeneous soils and crops.