一种基于导体尖端效应的无针式静电纺丝方法

doi:10.7503/cjcu20160851

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (6): 975.doi: 10.7503/cjcu20160851

• 中国第四届静电纺丝大会专题研究论文 • 上一篇下一篇

一种基于导体尖端效应的无针式静电纺丝方法

陈云军, 代红超, 王巍(), 强威

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:2016-11-29 出版日期:2017-06-10 发布日期:2017-05-19
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.

Needleless Electrospinning Method Based on Tip Effect of Conductor

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

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

Received:2016-11-29 Online:2017-06-10 Published:2017-05-19
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：

基于导体的尖端效应原理提出一种静电纺丝法, 将探针阵列有序嵌入并垂直于聚合物溶液槽底部, 保持针头与液面高度相近, 当给溶液施加高电压时, 会在针头附近区域形成峰值电场, 由于流体在电场中具有不稳定性, 射流能够在溶液表面的峰值电场处自发形成, 进而拉伸细化、劈裂成丝, 固化在收集板上. 但有序排列的探针阵列之间也存在电场相互干扰问题. 为了得到最佳的纺丝电场环境, 需对工作电场进行模拟及优化. 利用COMSOL Multiphysics 5.0建立几何模型, 分析嵌入探针的长短、数量、针间距及几何排布方式对溶液表面场强峰值的影响. 当溶液槽中嵌入一排探针时, 凸弧形的几何排布方式能提高中间区域的场强峰值; 对于两排探针, 交错的排布方式有利于改善溶液表面电场的均匀性, 而并列排布和对角线排布对均衡场强的效果不显著.

关键词: 静电纺丝, 尖端效应, 电场强度

Abstract:

An electrospinning method was proposed based on the principle of tip effect of conductor, in which the probe array is inserted in sequence and kept perpendicularly to the bottom of the polymer solution bath, with the tips of probes close to the fluid level. When a high voltage is applied to the solution, a peak electric field will be created in the vicinity of the probes. Due to instability of the fluid in the electric field, the jet can spontaneously form at the electric field peak on the solution surface, and then it is stretched and thinned, splitting into wires and solidifying on the receiving plate. However, there is also mutual interference of the electric field between the ordered probe arrays. Simulation and optimization is needed to obtain the best spinning electric field. The geometric model was established with COMSOL Multiphysics 5.0. The effects of the length, number, spacing and geometric arrangement of the embedded probes on the peak value of the field intensity on the surface of the solution were analyzed. It is found that the convex arc-shaped geometric arrangement can increase the peak value of the field intensity when one row of probes is embedded in the solution bath, the staggered arrangement is helpful to improve the uniformity of the electric field when two rows of probes are embedded, while the effects of parallel arrangement and diagonal arrangement on the equilibrium field intensity are not obvious.

Key words: Electrospinning, Tip effect, Electric field intensity

中图分类号:

O631

TrendMD:

陈云军, 代红超, 王巍, 强威. 一种基于导体尖端效应的无针式静电纺丝方法. 高等学校化学学报, 2017, 38(6): 975.

CHEN Yunjun, DAI Hongchao, WANG Wei, QIANG Wei. Needleless Electrospinning Method Based on Tip Effect of Conductor. Chem. J. Chinese Universities, 2017, 38(6): 975.

图/表 7

Fig.1 Schematic diagram of electrospinning equipment based on tip effect of conductor

Table 1 Parameters of finite element model

Side length of surface without wire/cm	Solution bath/cm	Receiving plate/cm	Receiving distance/cm	Probe diameter/mm
40	18×8×6	30×30×0.5	18	0.5

Fig.2 Graphic view of the complete setup constructed in COMSOL(A) and electric field intensity distribution on the solution surface(B)

Fig.3 Electric field distribution on the solution surface for different probe spacings(A) Probe length is 5 cm; (B) probe length is 4.95 cm.

Fig.4 Distribution of tip electric field intensity when three probes are arranged horizontally

Fig.5 Comparison of electric field peak values on solution surface in horizontal and convex arcs-haped arrangements

Fig.6 Parallel arrangement(A, A'), diagonal arrangement(B, B') and staggered arrangement models(C, C') in COMSOL(A—C) and electric fields on the solution surface corresponding to the three arrangements(A'—C')

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一种基于导体尖端效应的无针式静电纺丝方法

Needleless Electrospinning Method Based on Tip Effect of Conductor

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