基于分形原理的球形静电纺丝头建模及其电场仿真  

Design of spherical spinneret based on fractal principle and its electric field simulation

作　　者：刘延波 胡楷[1] 郝铭 胡晓东 杨波 LIU Yanbo;HU Kai;HAO Ming;HU Xiaodong;YANG Bo(School of Textile Science and Engineering,Wuhan Textile University,Wuhan 430200,China;School of Textile Science and Engineering,Tiangong University,Tianjin 300387,China)

机构地区：[1]武汉纺织大学纺织科学与工程学院,武汉430200 [2]天津工业大学纺织科学与工程学院,天津300387

出　　处：《天津工业大学学报》2024年第2期43-48,共6页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(51973168);“武汉英才”湖北省武汉市高层次人才项目(武财行[2022]734)。

摘　　要：为了提高球形纺丝头表面场强,精确控制射流的发射位点,基于分数维原理发明了一种球分形静电纺丝头,其结构通过在大球表面多次阵列一定数量小球获得,极大提高了小球表面的电荷密度,增大电场强度,在可控发射纺丝流体的同时有效降低纺丝电压,既节省能源又提高纺丝过程安全性。利用有限元软件COMSOL对球分形纺丝头进行了场强数值模拟分析,研究了小球数量(排列方式)和结构尺寸对电场强度及分布的影响,确定了小球数量和半径。结果表明:当大球半径为60 mm、小球半径为2.0 mm时,大球表面可等间距排列49个小球,该球分形纺丝头的场强比球状纺丝头提高了4倍,可在49个小球表面发射至少49个射流,小球间场强干扰低,射流位置固定,可增加电纺膜的均匀性。In order to improve the surface field intensity of the spherical spinneret and precisely control the jet emission,a spherical fractal electrostatic spinneret was invented based on the fractal dimension principle,whose structure is obtained by repeatedly arraying a certain number of small balls on the surface of a large ball,and the charge density on the surface of the small balls is greatly increased,and the electric field intensity is increased,which effectively reduces the spinning voltage while controlling the emission of the spinning fluid,saving energy and improving the safety of the spinning process.A numerical simulation of the field intensity of the spherical fractal spinneret was carried out using the finite element software COMSOL to study the effect of the number(arrangement),size and structure of spheres on the electric field intensity and distribution,and to determine the number and radius of the spheres.The results show that when the large sphere radius is 60 mm and the small sphere radius is 2.0 mm,the surface of the large sphere can be equally spaced 49 small spheres,the field intensity of this spherical fractal spinneret is 4 times higher than that of the spherical spinneret,and at least 49 jets can be emitted on the surface of the 49 small spheres,with low field interference between the small spheres and fixed jet position,which can increase the uniformity of the electrospun film.

关 键 词：静电纺丝 球分形结构 电场分布 有限元分析 

分 类 号：TS103.7[轻工技术与工程—纺织工程] TQ340.5[轻工技术与工程—纺织科学与工程]