明胶水溶液的静电纺丝成形

Electrostatic Spinning of Aqueous Gelatin Solution

以水为溶剂制备明胶溶液进行静电纺丝，在60～65℃纺得明胶超细纤维，探讨了明胶用量、静电电压及纤网收集距离等因素对明胶水溶液静电纺丝成形的影响．结果表明：在60～65℃范围内，明胶溶液的黏度随明胶用量的增加而大幅上升，呈2次指数关系；随明胶用量的降低（从25％降到15％），所得纤维平均直径减小（从266．5nm降为167．7nm）；随静电纺丝电压的升高，纤维直径下降，当电压大于17kV后其变化趋于平缓；静电纺丝收集距离在11～21cm之间变化时，所得的纤维直径在165～210nm之间，变化幅度不大．

Uhrafine fibers of gelatin were spun from aqueous gelatin solution via an electrostatic spinning process at 60 - 65 ℃, and the effects of the gelatin dosage, the electrostatic voltage and the spinning distance on the spinning process were investigated. The results indicate that, at 60 - 65 ℃, the viscosity of gelatin/water system greatly increases with the dosage of gelatin in a secondary exponential relationship, that the average diameter of fibers decreases from 266.5nm to 167.7nm corresponding to the gelatin dosage decreasing from 25% to 15% , that the fiber diameter decreases with the increase of spinning voltage to a constant at a voltage of more than 17 kV, and that the diameter slightly changes from 165 to 210 nm when the spinning distance varies form 11 to 21 cm.