Morphology and mechanical property of electrospun polyamide 6 nano-scale fiber filaments

Continuous polyamide 6(PA6) filament constructed of oriented alignment nano-scale fibers were made with a homemade modified electrospinning instrument from PA6/formic acid solution with a mass concentration of 22%.The effects of tip-to-collector distance(SD) and rotation speed(RS) on the morphology,diameter,and mechanical properties of the electrospun nano-scale fiber filaments were discussed.The results indicate that with the increase of SD,the oriented alignment of the fiber was improved,the diameter of the fiber decreased,and the diameter of the filament firstly decreased then increased while the breaking stress firstly increased then decreased.With the increase of RS,the orientation of the fiber obviously enhanced,the diameter of both electrospun PA6 fiber and yarn decreased,meanwhile the stress at break showed an increasing tendency as a whole.The RS played a more important role than SD on the electrospinning of continuous nano-scale PA6 fiber bundles.