Relationship between morphology of electrospun thick/thin composed fibers and performance and structure of membranes

PSU nanofiber membranes were produced by dissolving PSU particles in a mixed solution of DMF and acetone through electrospinning.PSU nanofibers with different diameters were fabricated by adjusting the concentration of spinning solution to investigate their influence on pore structure,permeability,and filtration performance.As a result,in terms of the permeability,mechanical property,pore structure and porosity,the coarse/fine composed nanofiber membranes were between PSU-18 and PSU-22.Furthermore,PSU-18 has the high filtration efficiency and big pressure drop,PSU-22 has low filtration efficiency,and thick/thin composed nanofiber membrane has a filtration efficiency of over 99% and lower pressure drop.The composed nanofiber membranes produced with the mass concentration of 18%,22%,and 22% in three nozzles respectively have the best capability in filtration due to the denser arrangement of the fibers when compared with other membranes with different morphologies.