多针头静电纺场强分布的研究

Researches on the Field Intensity Distribution of Multi-Needle Electrospinning

在静电纺丝过程中,电场的分布形式及场强大小,会影响射流的稳定性及整个纺丝的效果。为了得到最佳的纺丝电场环境,需对工作电场进行初步的模拟及优化。利用有限元分析软件ANSYS分别对规模化多针头高压静电纺丝机的工作场强进行了建模与仿真。分析研究表明:随着针头数的增加,场强峰值减小;同一排针中,边缘针场强最大,中间的针场强最小,且边缘针场强不是垂直针向下,而是由于受到其他针的库仑力向两侧倾斜。另外对纺丝针距进行优化,得出了多针头静电纺的最佳针间距。

In the process of electrospinning, the distribution of the electric field and the field intensity have impacts on the stability of jet flow and the electrospinning effects. In order to obtain the best spinning electric field environment, it is necessary to stimulate and optimize the electric field. This thesis utilizes the finite element analysis software ANSYS to simulate the electric intensity of the massive multi-needle electrospinning. The simulation results indicate that, with the increase of the number of needles, the peak of the field intensity reduces; In the same row of needles, the minimum of electric field intensity is in the middle, and the maximum electric field intensity is on the edge and is not perpendicular to the needle but is bias to two sides due to the coulomb force of other needles. In addition, this thesis optimizes the needle space and obtains the best needle space of multi-needle electrospinning.