无针式静电纺丝喷头几何形状对电场分布规律的影响机理

doi:10.7503/cjcu20160849

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (6): 982.doi: 10.7503/cjcu20160849

• 中国第四届静电纺丝大会专题研究论文 • 上一篇下一篇

无针式静电纺丝喷头几何形状对电场分布规律的影响机理

王巍(), 强威, 代红超

天津工业大学电气工程与自动化学院, 天津市电工电能新技术重点实验室, 天津 300387

收稿日期:2016-11-28 出版日期:2017-06-10 发布日期:2017-05-23
作者简介:联系人简介: 王巍, 男, 博士, 教授, 博士生导师, 主要从事机电磁一体化理论及应用、汽车电子及测控、信号传输与处理研究. E-mail: wangweibit@tjpu.edu.cn
基金资助:
国家科技支撑计划项目(批准号: 2014BAH03F01)资助.

Impact Mechanism of Needleless Electrospinning Spinneret Geometry on Electric Field Distribution Regularities

WANG Wei^*(), QIANG Wei, DAI Hongchao

School of Electrical Engineering and Automation,Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy,Tianjin Polytechnic University, Tianjin 300387, China

Received:2016-11-28 Online:2017-06-10 Published:2017-05-23
Contact: WANG Wei E-mail:wangweibit@tjpu.edu.cn
Supported by:
This paper is supported by the National Key Technology R & D Program of China(No.2014BAH03F01).

摘要/Abstract

摘要：

根据射流的质量守恒、电荷守恒和动量守恒分析稳态射流的运动过程, 建立了控制方程组; 应用有限元分析软件COMSOL Multiphysics 5.0建立3种无针式喷头模型, 分析其外部电场的分布规律. 研究发现, 在由典型圆柱体喷头到增加辅助电极的阶梯轴喷头的几何形状变化过程中, 电场强度分布受两侧添加的辅助电极角度和增加回转体数量及回转体直径的影响, 通过设计, 电场被逐步优化. 对无针式静电纺丝装置的生产效率及纤维质量的提高具有重要意义.

关键词: 静电纺丝, 喷头, 电场强度

Abstract:

In the needleless electrospinning technology, the distribution and the value of electric field at spinneret are the key factors that influence the electrospinning process and the formation of nanofibers. Different geometries of the spinneret directly affect the distribution of the external electric field. Therefore, it is of practical significance for the design and optimization of needleless electrospinning spinneret through the research on the distribution of electric field from the geometry. In this paper, governing equations had been set up to analyze movement process of steady-state jet from three aspects: mass conservation, charge conservation and momentum conservation. The finite element analysis(FEA) software COMSOL Multiphysics 5.0 is used to model three needleless electrospinning spinnerets and analyze the distribution of external electric field. It is found that during the evolution from the typical cylindrical spinneret to the stepped shaft one with the added auxiliary electrodes, the distribution of electric field is influenced by the angle of the auxiliary electrodes added on both sides, plus of the number and diameters of rotary parts. The electric field is optimized step by step through a series of designs. The research is very important to the improvement of production efficiency and nanofiber quality of the needleless electrospinning equipment.

Key words: Electrospinning, Spinneret, Electric field intensity

中图分类号:

O631
O441.4

TrendMD:

王巍, 强威, 代红超. 无针式静电纺丝喷头几何形状对电场分布规律的影响机理. 高等学校化学学报, 2017, 38(6): 982.

WANG Wei, QIANG Wei, DAI Hongchao. Impact Mechanism of Needleless Electrospinning Spinneret Geometry on Electric Field Distribution Regularities. Chem. J. Chinese Universities, 2017, 38(6): 982.

图/表 11

Fig.1 Schematic diagram of fluid mass conservation

Fig.2 Scheme diagram of electrospinning process

Fig.3 Schematic analysis of micro element visco-us resistance

Fig.4 Schematic diagram of needleless electrosp-inning model

Fig.5 Surface arrow diagram of the electric field distribution of the cylinder spinneret

Fig.6 Distribution of the field intensity on the surface of the cylinder head at different heights in the x-axis directionHeight/mm:a. 0; b. 1; c. 2; d. 3; e. 4.

Fig.7 Schematic diagram of polymer solution bath with the auxiliary electrodes

Fig.8 Electric field intensity distribution in the x-axis direction at 1 mm on the upper surface of the cylinder spinneretθ/(°): a. 0; b. 30; c. 45; d. 60; e. 90.

Fig.9 Evolution schematic diagram of the spinneret from typical cylinder to stepped shaft

Fig.10 Electric field intensity distribution in the x-axis direction at 1 mm on the upper surface of the stepped shaftθ/(°): a. 0; b. 30; c. 45; d. 60; e. 90.

Fig.11 Electric field intensity distribution in the x-axis direction at 1 mm on the upper surface of the stepped shaft(θ=30°)Length/cm: a. 2.4; b. 2.8; c. 3.2.

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无针式静电纺丝喷头几何形状对电场分布规律的影响机理

Impact Mechanism of Needleless Electrospinning Spinneret Geometry on Electric Field Distribution Regularities

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