溶剂对电纺聚苯乙烯的可纺性及"珠粒"形貌形成的影响

将聚苯乙烯(PS)分别溶于四氢呋喃(THF)、N,N-二甲基甲酰胺(DMF)、甲苯3种溶剂中,用静电纺丝法制备了直径在亚微米级的纤维.用旋转黏度计测定溶液的黏度,视频光学接触角测定仪测定溶液的表面张力,电导率仪测定溶液的电导率,通过扫描电子显微镜(SEM)对各种PS溶液电纺纤维的形貌进行了表征,分析了各种影响可纺性及纤维形貌的因素.结果发现:溶剂的偶极矩、沸点及所配溶液的电导率是影响静电纺丝可纺性的重要因素.以THF、DMF做溶剂时,可纺性较好,用甲苯做溶剂时可纺性较差;所得纤维中珠粒形态主要取决于溶剂的性质及溶液的黏度.

Effect of Solvents on Electro-spinnability of Polystyrene Solutions and Beaded Appearance of Resulting Electrospun Polystyrene Fibers

Three kinds of solutions were prepared by dissolving polystyrene(PS) in tetrahydrofuran(THF),N,N-dimethyl-formamide(DMF) and toluene respectively,then were electrospun to fibers of sub-micron in diameters.The solutions were characterized for their viscosity,surface tension,and conductivity using rotary viscosimeter,contact-angle system and conductivitymeter,respectively.The morphology of the electrospun fibers was investigated by scanning electron microscopy.Results showed that the important factors determining the electro-spinnability of the PS solutions were boiling point,dipole moment of the solvent and the conductivity of the resulting solutions.The morphology of beads on resulting electrospun PS fibers depended on the solvent and the viscosity of solutions.