线型静电纺丝泰勒锥自组织成形影响分析

Influence Analysis of Self-organization Forming of Taylor Cone in Linear Electrospinning

采用一种自制线型自由液面静电纺丝装置考察聚合物溶液浓度、工作电压、喷头转速及电极丝直径4个工艺参数对聚合物泰勒锥成形及其线密度的影响,应用响应面法设计实验方案,同时建立工艺参数与聚合物泰勒锥尺寸间的数学模型,量化响应与输入间的关系。实验中泰勒锥平均尺寸为0.327~0.797 mm,相对标准偏差为8.19%~14.31%,平均线密度为0.583~0.237 pcs/mm。研究结果表明:一定条件下PVDF泰勒锥平均直径随着聚合物溶液浓度、工作电压的增加而减小,随着电极丝直径的增加而增大,受喷头转速影响较小;并得出上述4个因素对泰勒锥平均直径的影响由大到小依次排序为:电极丝直径、溶液浓度、工作电压、喷头转速。

A self-made linear free liquid surface electrospinning device was used to investigate the effects of four process parameters:polymer solution concentration,operating voltage,nozzle speed and electrode wire diameter on the forming of polymer Taylor cones and their linear density.The experimental scheme was designed by the response surface methodology,and the mathematical model between the process parameters and the size of the polymer Taylor cone was established,and the relationship between the response and the input was quantified.In the experiment,the average diameter of Taylor cone was 0.327~0.797 mm,the relative standard deviation was 8.19%~14.3%,and the average linear density was 0.583~0.237 pcs/mm.The research results show that under certain conditions,the average diameter of PVDF Taylor cone decreases with the increase of polymer solution concentration and operating voltage,and increases with the increase of electrode wire diameter,which is less affected by the rotation speed of the nozzle.And it is concluded that the influence of the above four factors on the average diameter of the Taylor cone is ranked in descending order:electrode wire diameter,solution concentration,operating voltage,and nozzle speed.