| Abstrakt: |
Traditional hygroscopic materials used in solution dehumidification technology are prone to causing corrosion and deformation of the packing tower due to long-term contact with the packing. The hygroscopic nanofiber membrane, with a large specific surface area, high hygroscopic performance, and good breathability, demonstrates excellent application potential in this field. This article successfully prepared polyacrylonitrile (PAN)/urea (Urea) composite nanofiber membranes through the electrospinning method. Urea significantly enhanced the moisture absorption ability of the nanofiber membrane due to its unique moisture absorption performance. The microstructure and morphology of nanofiber membranes were characterized using techniques such as scanning electron microscopy (SEM), specific surface area measurement (BET), and infrared spectroscopy (FT-IR). The influence of different lithium chloride (LiCl) impregnation concentrations, impregnation times, and the mass ratio of PAN and Urea on the dehumidification effect of nanofiber membranes was explored using a high and low temperature experimental chamber. The results showed that with a mass ratio of PAN to urea of 1: 1 and an impregnation mass fraction of LiCl at 35wt%, after 48 hours of impregnation, the nanofiber membrane achieved a moisture absorption of 4. 48 g/g. This was tested in a high and low-temperature experimental chamber at 25 T and 95% RH for 5 hours. This composite material exhibits excellent moisture absorption performance, providing new ideas for the design and development of nanofiber-type moisture-absorbing materials. [ABSTRACT FROM AUTHOR] |
