熔体近场直写轴向压弯模型构建与仿真分析

Model Construction and Simulation Analysis of Rope Coiling Effect in Melt Near-field Electrospinning

蜿蜒纤维具有超弹性、高延展、各向异性等特点,为方便蜿蜒纤维的制造提出熔体近场直写结合轴向压弯效应制备蜿蜒结构的新方法。采用COMSOL Multiphysics多物理场耦合对近场直写的电场大小、分布趋势进行模拟分析,以此为基础通过静电和固体力学耦合模拟电场对射流的轴向压弯效果,仿真结果显示电场对射流的蜿蜒屈曲起积极作用。最后通过双因素三水平实验获得不同形貌的蜿蜒沉积,证明该种方法可行。

The meander fiber has the characteristics of super elasticity,high elongation and anisotropy.In order to facilitate the manufacture of the fiber,a new method was proposed:“melt near-field electrospinning combined with axial bending effect”.COMSOL multiphysicscoupling function was used to simulate and analyze the magnitude and distribution trend of electric potential and electric field in the process of spinning.Based on this,the electrostatic and solid mechanics interfaces were coupled to simulate the effect of electric field force on the jet s axial bending.The results showed that the electric field force had a positive effect on the jet s meandering buckling.The meandering deposits with different morphologies were verified by two-factor three-level experiments,which proved that this method was feasible.