Effect of Receiving Drum Speed on Electrostatic Spinning Polyurethane Nanofibers
In order to investigate the influence of receiving drum rotation speed on the diameter and orientation of electrostatic spun polyurethane(PU)nanofibers,N,N-dimethylformamide(DMF)and tetrahydrofuran(THF)were selected as solvents,and the mass fraction of solute,solvent ratio and injection rate were changed by electrospinning method through orthogonal experiment to determine the appropriate spinning parameters.On this basis,the relationship between the rotation speed of the receiving drum and the diameter and orientation of the fiber is studied.The results showed that the nanofiber membranes prepared with PU mass fraction of 18％,THF/DMF volume ratio of 2∶1,injec-tion rate of 3 mL/h,voltage of 20 kV,receiving drum speed of 200 r/min and receiving distance of 20 cm had good morphology.With the increase of receiving drum speed,the diameter of electrostatic spinning PU nanofibers decreases first and then increases slightly,and the fiber orientation increases first and then decreases.
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