一种实心针静电纺丝装置的场强模拟及优化

doi:10.7503/cjcu20160852

高等学校化学学报 ›› 2017, Vol. 38 ›› Issue (6): 1011.doi: 10.7503/cjcu20160852

• 中国第四届静电纺丝大会专题研究论文 • 上一篇下一篇

一种实心针静电纺丝装置的场强模拟及优化

刘健¹(), 刘延波^2,^3,⁴(), BUKHARI Samman hassan², 任倩², 韦春华³, 蒋秀明¹

1. 天津工业大学天津市现代机电装备技术重点实验室, 天津 300387
2. 武汉纺织大学纺织学院, 武汉 430200
3. 天津工业大学纺织学院, 天津 300387
4. 天津工业大学先进纺织复合材料教育部重点实验室, 天津 300387

收稿日期:2016-11-29 出版日期:2017-06-10 发布日期:2017-05-22
作者简介:联系人简介: 刘延波, 女, 博士, 教授, 主要从事超细纤维材料的开发技术研究. E-mail: yanboliu@gmail.com ; 刘健, 男, 讲师, 主要从事CAD/CAM一体化技术、新型纺织机械设计及理论研究. E-mail: liujian3286@126.com
基金资助:
国家自然科学基金(批准号: 51373121)资助.

Electric Field Simulation and Optimization on Solid-core Needles of Electrospinning Device

LIU Jian^1,^*(), LIU Yanbo^2,^3,^4,^*(), BUKHARI Samman hassan², REN Qian², WEI Chunhua³, JIANG Xiuming¹

1. Tianjin Key Laboratory of Modern Technology & Equipment, Tianjin Polytechnic University, Tianjin 300387, China;
2. School of Textiles, Wuhan Textile University, Wuhan 430200, China
3. School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
4. Key Laboratory of Advanced Textile Composites, Ministry of Education,Tianjin Polytechnic University, Tianjin 300387, China

Received:2016-11-29 Online:2017-06-10 Published:2017-05-22
Contact: LIU Jian,LIU Yanbo E-mail:liujian3286@126.com;yanboliu@gmail.com
Supported by:
This paper is supported by the National Natural Science Foundation of China(No.51373121).

摘要/Abstract

摘要：

提出一种实心针静电纺丝方法, 采用实心针作为静电发射极, 并将其置于由绝缘材料制成的导液棒轴心, 导液棒处于储液盒底部的圆锥沉头通孔内部并可以做升降运动以控制供液量, 需要时还可以起到通流的作用, 有效地解决了多针头静电纺丝堵塞和无针头静电纺丝开放式供液的问题. 利用COMSOL有限元分析软件对影响场强大小及分布的各参数进行场强模拟, 研究增大场强并减小边缘效应的改进方法, 并采用研发的不完全齿轮横动机构纺丝头做往复横动进行纺丝实验, 验证了实心针静电纺丝装置有效降低了能耗和边缘效应, 避免了针头堵塞及溶剂挥发问题.

关键词: 静电纺丝, 实心针, COMSOL, 电场模拟

Abstract:

Electrospinning is a widely used technique for nanofiber preparation at large scale that is mainly divided into two categories, namely, multi-needle and needleless categories. However, both categories have some drawbacks. For example, the capillary channels of the former can easily get jammed, while the solvent in the polymer solution storage box of the latter is liable to volatilize. A new type of solid-core needle electrospinning method was proposed and investigated to overcome the shortcomings of the current electrospinning technology. In this method, the solid-core needles with no capillary channels were used as the emitting electrodes and placed on the axis of the solution guiding rods made of insulating materials. The solution guiding rods were in close connection with the taper holes at the bottom of the solution storage box and could be moved up and down to control the solution flow. Moreover, the reciprocating up-and-down movement of the solution guiding rods can clean up the liquid feeding channels, thereby preventing the solution from coagulating and blocking the channels. Thus, the problems existing in the current electrospinning technologies, such as the needle capillary blockage in the needle electrospinning method and the rapid solvent volatilization in the solution box in the needleless electrospinning method, can be efficiently avoided. Electric field intensity simulations of the newly established electrospinning models were also performed to find the optimum structure parameters by increasing the field intensity and reducing the end effect with the help of the finite element analysis software, COMSOL. Lastly, electrospinning experiments were conducted on the newly invented electrospinning device based on the solid-core needle and non-circular gear traverse mechanism. The results indicate that this new electrospinning method could solve the complications of polymer clogging and solvent volatilization and obtain a uniform electrospinning effect.

Key words: Electrospinning, Solid-core needle, COMSOL, Electric field simulation

中图分类号:

O631

TrendMD:

刘健, 刘延波, BUKHARI Samman hassan, 任倩, 韦春华, 蒋秀明. 一种实心针静电纺丝装置的场强模拟及优化. 高等学校化学学报, 2017, 38(6): 1011.

LIU Jian, LIU Yanbo, BUKHARI Samman hassan, REN Qian, WEI Chunhua, JIANG Xiuming. Electric Field Simulation and Optimization on Solid-core Needles of Electrospinning Device. Chem. J. Chinese Universities, 2017, 38(6): 1011.

图/表 14

Fig.1 Electrospinning emitting electrode using solid-core needles (A) Main view; (B) local enlarged view.

Fig.2 Schematic diagram of the electrospinning device using solid-core needles

Table 1 Basic model parameters

Voltage/kV	Diameter of needles/mm	Distance between two needles/mm	Receiving distance/mm	Length of needles/mm	Size of receiving plate/mm³
30	1	28	150	24	150×60×2

Fig.3 Field intensity map of five conventional needles in a linear array

Fig.4 Average electric field intensity of five conventional needles in a linear array

Fig.5 Field intensity map of the solid-core needles wrapped with an insulating material

Fig.6 Average electric field intensity of the solid-core needles wrapped with an insulating material

Fig.7 Field intensity maps after changing the length of the solid-core needlesLength of needles/mm: (A) 12; (B) 6; (C) 3.

Fig.8 Peak value of the electric field intensity after changing the length of the solid-core needles

Fig.9 Average electric field intensity after changing the length of the solid-core needles

Fig.10 Field intensity maps after increasing the diameter Diameter of solution guiding rods/mm: (A) 11; (B) 12.

Fig.11 Field intensity map of the solid-core needles with conical tips

Fig.12 Electrospinning device with solid-core needles

Fig.13 SEM image of nanofibers

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一种实心针静电纺丝装置的场强模拟及优化

Electric Field Simulation and Optimization on Solid-core Needles of Electrospinning Device

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