内外双层锥面熔体微分静电纺丝实验研究

Experimental study of internal and external cone combinations in double-layer melt differential electrospinning

为了进一步提高单喷头纤维的产量,在熔体微分静电纺丝的基础上,设计开发了一种结合内外锥面的双层熔体微分静电纺丝装置。通过COMSOL Multiphysics数值仿真软件对其电场进行对比分析,得出增加的内层锥面对外层电场有一定的削弱作用。通过实验分析了内层锥面伸出距离对内外层射流的影响,找到了最佳参数,并且在此参数下,验证了不同电压下的纺丝效果,结果表明,随着电压的增加,内外层锥面电场增加程度相同,内外层纤维直径达到了均匀分布。最后分别采用吹风和吸风辅助对纤维进行了细化,为静电纺丝法制备超细纤维的产业化提供参考。

In order to improve the fiber yield in melt differential electrospinning when using a single nozzle,we have designed an internal and external cone combination double-layer melt differential electrospinning apparatus.By means of a comparative analysis using the numerical simulation software COMSOL Multiphysics,the additional internal cone has been shown to have a weakening effect on the electric field on the external cone.The optimum extension distance between the internal cone and the external cone has been found by experimental analysis of the jets on the cone,and the spinning effects of different voltages have been obtained for this extension distance.The results show that as the voltage increases,the electric field on the internal and external cone increases to the same extent,and the fiber diameter of the inner and outer layers are evenly distributed.The average fiber diameter can be reduced by blowing and suction assistance,which lays the foundation for industrial application of this method.