多喷头纺丝装置的仿真与设计  

Simulation and design of multi-nozzle spinning device

作　　者：张佃平[1] 王昊 林文峰 王振秋 ZHANG Dianping;WANG Hao;LIN Wenfeng;WANG Zhenqiu(School of Mechanical Engineering,Ningxia University,Yinchuan,Ningxia 750021,China)

机构地区：[1]宁夏大学机械工程学院,宁夏银川750021

出　　处：《纺织学报》2024年第10期200-207,共8页Journal of Textile Research

基　　金：银川市科技创新项目(2023NYHZC01)。

摘　　要：针对静电纺丝多喷头间电场强度分布不均匀所导致的纺丝液射流运动轨迹不稳定、纺丝纤维分布较为分散等边缘效应问题,采用COMSOL Multiphysics软件,通过深入研究多喷头静电纺丝的纺丝电压、喷头间的横向间距和纵向间距对多喷头电场强度分布均匀性的影响程度,给出削弱多喷头边缘效应的喷头最优空间位置关系。结果表明:在三喷头仿真实验中,增大喷头间的横向间距,3个喷头的电场强度随着纵向间距的减小而逐渐趋于一致;当横向间距为5.0 cm、纵向间距为0.5 cm时,边缘效应能够得到有效缓解,且该间距更有利于多喷头的结构设计;五喷头、九喷头静电纺丝装置在保持横向间距为5.0 cm不变的情况下,纵向间距为0.5 cm时的电场强度分布相对于零点位置更加均匀,且九喷头的效果最好。通过实验验证,九喷头结构具有纺丝面积大、效率高和纺丝过程稳定等优点,研究结果可为纺丝装置的多喷头结构研究与设计提供借鉴。Objective Nanofibres have been widely used in many scientific fields due to their excellent characteristics such as large specific surface area and high porosity.Currenly,the electrospinning efficiency of the traditional electrospinning equipment is low,failing to meet the requirement for practical applications.Researchers worked to improve the electrospinning efficiency by increasing the number of nozzles,but there is an"edge effect"problem in multi-nozzle electrospinning.The"edge effect"is generally manifested in the uneven distribution of electric field strength at the nozzle,which leads to electrospinning instability.This study aims to solve the"edge effect"problem through electric field intensity simulation analysis and to design a corresponding multi-nozzle device.Method Three nozzles were used as the basis for simulation.By changing longitudinal spacing and transverse spacing of nozzles,COMSOL Multiphysics software was employed to analyze the change of the electric field intensity.Following the three-nozzle space electric field intensity simulation analysis,five-nozzle and nine-nozzle simulation analysis of electric field intensity distribution were carried out,the results of which were used for designing multi-nozzle devices.Results In the three nozzles space electric field intensity simulation,the electric field intensity values of the three nozzles appeared to be the same when increasing transverse spacing,where the transverse spacing was kept to 9.45 cm.However,excessive transverse spacing was found not conducive to the structural design of the multi-nozzle device.The effect of increasing the voltage of the middle nozzle on the electric field intensity was much smaller than the effect of changing the transverse spacing on the electric field intensity.Among them,when the transverse spacing was 5.0 cm,the electric field intensity value was only 2170 kV/m,which is not conducive to spinning experiments,and the additional high-voltage power required for smaller transverse spacing would cause resource waste

关 键 词：静电纺丝 纳米纤维 多喷头 纺丝装置仿真 电场分布 多喷头纺丝技术 

分 类 号：TB383[一般工业技术—材料科学与工程]