摘要
为了使静电纺丝过程高效稳定,明确多射流喷头电场分布规律与控制策略,开展结构优化、减少电场抑制,提出了一种新的静电纺丝多射流喷头——错列喷头。从理论分析了多射流存在边缘现象的原因,开展单列、双列、错列喷头的电场仿真分析。结果表明,无论何种结构,随着喷头中的针头间距由15 mm增加到30 mm,边缘效应减弱而电场强度增加,但针头间距的增加必然导致射流密度降低;和单列喷头相比,双列喷头有增加射流密度的优势,是批量生产的最普遍方法,但其电场强度均低于单列喷头且边缘效应有所加强;错列喷头因针头间距的互补而在提高射流密度方面有一定的优势,电场强度和边缘效应均优于针头间距15 mm双列喷头而劣于针头间距30 mm喷头。总之,错列喷头在保证一定的射流密度条件下,可获得相对较高的电场强度。这为多射流静电纺丝过程的稳定和持续提供了技术保障,为后续多针头喷头规模化生产的设备制造提供了研究基础。
In order to obtain efficient and stable process of electrostatic spinning,clarify electric field distribution law and control strategy of multiple jet nozzle,carry out structure optimization and reduce electric field suppression,a new electrostatic spinning multiple jet nozzle–staggered jet nozzle was proposed.The reason of edge phenomenon existed in multiple jets was analyzed theoretically,and the electric field simulation analysis of single-row,double-row and staggered jet nozzle was carried out.The results show that edge effect decreases and electric field intensity increases with the increase of spacing of needles in nozzle from 15 mm to 30 mm in any structure,but the increase of spacing of needles must lead to the decrease of jet density.Compared with single-row jet nozzle,double-row jet nozzle has the advantage of increasing jet density,which is the most common method for mass production.However,its electric field intensity is lower than single-row jet nozzle and the edge effect is enhanced.Due to the complementary jet density of the spacing of needles,the staggered jet nozzle has certain advantages,the electric field intensity and edge effect are better than those of the double-row jet nozzle with spacing of needles of 15 mm but worse than those of the double-row jet nozzle with 30 mm.In short,for the the staggered jet nozzle,a relatively high electric field intensity can be obtained under the condition of ensuring a certain jet density.This provides a technical guarantee for the stable and continuous process of multi-jet electrostatic spinning,and provides a research basis for the subsequent equipment manufacturing of multi-jet nozzle large-scale production.
作者
卓丽云
朱自明
郑高峰
Zhuo Liyun;Zhu Ziming;Zheng Gaofeng(College of Mechanical and Manufacturing Engineering,Xiamen University of Technology,Xiamen 361021,China;Mechanical engineering college,Guangdong University of Technology,Guangzhou 510006,China;Department of Instruments and Electricity,Xiamen University,Xiamen 361102,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第10期59-64,共6页
Engineering Plastics Application
基金
福建省高等学校学科带头人培养计划项目
福建省中青年教师教育科研项目(JAT190941)
厦门工学院科研项目(KYT2019002)。
关键词
静电纺丝
边缘效应
错列喷头
电场强度
electrostatic spinning
edge effect
staggered jet nozzle
electric field intensity
