溶液参数对静电纺丝PAN@PS复合纳米纤维形貌及结构的影响

Polyacrylonitrile(PAN) and polystyrene(PS) composite nanofibers(PAN@PS) were fabricated via coaxial electrospinning technology with PAN solution as core and PS solution as shell. The effect of the concentration of the spinning solutions and properties of the solvents on the morphology and structure of PAN@PS composite nanofibers were investigated. The results reveal that the composite fibers of PAN@PS/tetrahydrofuran(THF) with PS/THF as the shell solution exhibit the coaxial structure with distinct phase interface. With the increase of the shell solution concentration,the diameters of these fibers increase first then fall,but overall appear a trend of increasing. The diameter of the fibers with smooth surface reaches about 693 nm when the mass fraction of PS/THF is 20%. Whereas the fibers of PAN@PS/dimethylformamide(DMF) with the mass fraction of PS/DMF of 20% present a two-phase continuous structure with uneven surface morphology,and the diameter of the fibers is larger than that of PAN@PS/THF. Therefore,the morphology and structure of the composite fibers can be controlled by varying the electrospinning solution parameters.