正负极同电场静电纺丝电场性质及其机理

Mechanism and Electric Field Properties of the Dual Electrode Mode Electrospining

利用高压直流正负极同电场静电纺丝方法，制备了聚（3-羟基丁酸-co-4-羟基丁酸酯）共聚物的超细纤维，实验发现，正负极同时工作，形成的宏观纤维形貌与单极相比截然不同，纤维形态呈现出“蜘蛛网”的变化趋势．用电磁学理论建立了数学模型．电压控制在8．0kV，溶液质量分数为20％，电导率控制在0．002～46．7μS／cm时，正负极同电场工作时纺丝速率比单极高十几倍；纤维拉伸取向好于单极纺丝，该方法为静电纺丝产业化提供了新的思路．

A novel, high speed electrospinning process, dual electrode mode electrospinning was developed. With coexistence of both positively and negatively charged nozzles, the electrospun fibers interact between nozzles, interconnect with each other, and are stretched on a movable collecting roll. By electrospinning the biodegradable polymer via the dual electrode mode process, a highly intertwined, mathematics mode was obtained. Moreover, the productivity was increased more than 10 times＇ in comparison to that by using the conventional single electrode mode process, which is essential for commercialization of the electrospinning process.