无针式碟形静电纺丝喷头不同圆周倾角的模拟与试验

摘要

设计一种新型无针式碟形静电纺丝喷头用以制备亚微米纤维.建立不同圆周倾角的碟形喷头几何模型,利用ANSYS Maxwell 3D电磁学分析软件模拟无针式碟形喷头的电压及电场强度分布,探究无针式碟形喷头不同圆周倾角对亚微米纤维直径及产量的影响.结果表明:碟形喷头边缘处的电场强度最大,在施加电压一致时,圆周倾角越大则碟形喷头边缘的电场强度越大;纺丝液与水平面夹角随着圆周倾角的增大而增大;利用不同质量分数的聚丙烯腈(PAN)溶液进行纺丝,随着PAN质量分数的增加,亚微米纤维直径增加;随着碟形喷头圆周倾角的增加,亚微米纤维直径减小,产量增加.%A new needleless electrospinning dish nozzle was designed to produce submicron fibers and the geometric model of the dish nozzle with different circumferential tilt angles was established.The ANSYS Maxwell 3D analysis software was used to simulate the distribution of voltage and electric field intensity of the needleless dish nozzle,and the influences of different circumferential tilt angles on the diameter and the yield of submicron fibers were explored.The results show that the electric field intensity at the edge of the dish is the largest,and the larger the circumferential tilt angle,the bigger the electric field intensity when under the same value of applied voltage.The angle between the spinning solution and the horizontal plane increases with the increase of the circumferential tilt angle.Different mass fractions of polyacrylonitrile (PAN) solution are used for spinning and the diameter of submicron fiber increases with the increase of solution concentration.With the increase of the tilt angle,the diameter of the submicron fiber decreases while the throughput increases.