Bending instability in electrospinning of nanofibers

被引:794
作者
Yarin, AL [1 ]
Koombhongse, S
Reneker, DH
机构
[1] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel
[2] Univ Akron, Dept Polymer Sci, Maurice Morton Inst Polymer Sci, Akron, OH 44325 USA
关键词
D O I
10.1063/1.1333035
中图分类号
O59 [应用物理学];
学科分类号
摘要
A localized approximation was developed to calculate the bending electric force acting on an electrified polymer jet, which is a key element of the electrospinning process for manufacturing of nanofibers. Using this force, a far reaching analogy between the electrically driven bending instability and the aerodynamically driven instability was established. Continuous, quasi-one-dimensional, partial differential equations were derived and used to predict the growth rate of small electrically driven bending perturbations of a liquid column. A discretized form of these equations, that accounts for solvent evaporation and polymer solidification, was used to calculate the jet paths during the course of nonlinear bending instability leading to formation of large loops and resulting in nanofibers. The results of the calculations are compared to the experimental data acquired in the present work. Agreement of theory and experiment is discussed. (C) 2001 American Institute of Physics.
引用
收藏
页码:3018 / 3026
页数:9
相关论文
共 13 条
[1]  
[Anonymous], 1993, FREE LIQUID JETS FIL
[2]  
[Anonymous], 1997, Introduction to Theoretical and Computational Fluid Dynamics
[3]   DYNAMICS OF A VORTEX FILAMENT IN A SHEAR-FLOW [J].
AREF, H ;
FLINCHEM, EP .
JOURNAL OF FLUID MECHANICS, 1984, 148 (NOV) :477-497
[4]   LOCALIZED-INDUCTION CONCEPT ON A CURVED VORTEX AND MOTION OF AN ELLIPTIC VORTEX RING [J].
ARMS, RJ ;
HAMA, FR .
PHYSICS OF FLUIDS, 1965, 8 (04) :553-&
[5]  
Batchelor G.K, 1967, An Introduction to Fluid Dynamics
[6]   THE DYNAMICS OF THIN LIQUID JETS IN AIR [J].
ENTOV, VM ;
YARIN, AL .
JOURNAL OF FLUID MECHANICS, 1984, 140 (MAR) :91-111
[7]   Bending instability of electrically charged liquid jets of polymer solutions in electrospinning [J].
Reneker, DH ;
Yarin, AL ;
Fong, H ;
Koombhongse, S .
JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :4531-4547
[8]   Nanometre diameter fibres of polymer, produced by electrospinning [J].
Reneker, DH ;
Chun, I .
NANOTECHNOLOGY, 1996, 7 (03) :216-223
[9]   ACOUSTIC LEVITATION IN A FREE-JET WIND-TUNNEL [J].
SEAVER, M ;
GALLOWAY, A ;
MANUCCIA, TJ .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1989, 60 (11) :3452-3459
[10]   Validation and application of a novel elongational device for polymer solutions [J].
Stelter, M ;
Brenn, G .
JOURNAL OF RHEOLOGY, 2000, 44 (03) :595-616