On the measured current in electrospinning

被引：47

作者：

Bhattacharjee, P. K. ^{[1
]}

Schneider, T. M. ^{[2
]}

Brenner, M. P. ^{[2
]}

McKinley, G. H. ^{[1
,3
]}

Rutledge, G. C. ^{[1
,4
]}

机构：

[1] MIT, Inst Soldier Nanotechnol, Cambridge, MA 02139 USA

[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02139 USA

[3] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[4] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 04期

基金：

美国国家科学基金会;

关键词：

electric field effects; electrical conductivity; electrospinning; polymer solutions; solvent effects; ELECTRICALLY FORCED JETS; POLYMER; NANOFIBERS; FIBERS;

D O I：

10.1063/1.3277018

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The origin and scaling of the current measured during steady electrospinning of polymer solutions in organic solvents are considered. For a specified electric field strength E, flow rate Q, and conductivity K, the total measured current is shown empirically to scale as I-total similar to EQ(0.5)K(0.4), for a wide variety of polymer solutions with different electrical conductivities. It is also shown that I-total is composed of two distinct components: one that varies linearly with E, and another that is independent of E, but varies with the conductivity K of the fluid and the flow rate Q. The experimental evidence suggests that the latter component arises due to a secondary electrospray emanating from the surface of the jet. The consequence of this secondary electrospray mechanism on the final fiber size achieved during the electrospinning process is also discussed.

引用

页数：7

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