基于不同纺丝参数下取向纳米纤维的制备及取向度分析

Preparation and orientation degree analysis of oriented nanofibers based on different electrospinning parameters

为了探讨溶液性能及纺丝参数对静电纺取向纳米纤维形态的影响,制备不同质量分数的聚丙烯腈(PAN)溶液和加入不同质量分数LiCl的PAN溶液,对溶液黏度和电导率进行测试,并利用旋转的滚筒制备了不同的取向纳米纤维。研究表明:PAN溶液黏度和电导率都随着溶液质量分数的增加而增加,且黏度呈指数增加;而随着LiCl质量分数的增加,PAN溶液的黏度略有下降,而电导率显著增加。相同滚筒转速(2000 r/min)下,PAN纳米纤维的取向排列程度随着溶液质量分数的增加先提高后降低,12%的PAN纳米纤维的取向排列程度最好;而随着LiCl质量分数的增加,PAN纳米纤维的取向排列程度增加。当滚筒转速从1500 r/min增加到2500 r/min,纳米纤维的取向排列程度也增加了。

In order to study the effects of solution performance and electrospinning parameters on the morphology of oriented nanofibers,polyacrylonitrile(PAN) solution with different concentration and different content of LiCl was prepared,and the viscosity and conductivity of PAN solution were measured. Different oriented PAN naofibers were prepared by using the rotating cylinder. The results showed that with the increase of solution concentration,the solution viscosity increased exponentially. With the rise of LiCl content,solution conductivity increased slightly,while the solution conductivity increased significantly. At the same rotating speed of cylinder,theorientation alignment degree of PAN nanofibers increased firstly,and then decreased with the increase of solution viscosity. The orientation alignment degree of PAN nanofibers with 12% concentration is the best. In addition,the orientation alignment degree of PAN nanofibers increased with the increase of LiCl content. When the rotating speed of cylinder increased to 2 500 r/min from 1 500 r/min,the nanofibers have the best orientation alignment degree.