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Electrospray ing & Electospinning. Nils André REINKE, Universitat Duisburg, BRD Seminar: Self-organized and artificial nanostructures, applied physics, summer-term 2002. Overview: I. Various kinds of spraying II. Outflow of a liquid from a capillary III. Rayleigh instability

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electrospray ing electospinning
Electrospraying & Electospinning

Nils André REINKE, Universitat Duisburg, BRD

Seminar: Self-organized and artificial nanostructures, applied physics, summer-term 2002.

Overview:

I. Various kinds of spraying

II. Outflow of a liquid from a capillary

III. Rayleigh instability

IV. The future development and application

i various kinds of spraying
I. Various kinds of spraying

Bernoulli effect

sprayer

Liquid suction

slide3

Spraying caused by a spinning disc:

Drop-mode

V ...circumferential velocity

Centrifugal acceleration

Ligament-mode

Sheet-mode

slide4

Ultrasound spraying

Ultrasound builder

slide5

Electrospraying:

+

Charged droplets

Nano proportions

Nanoparticles & nanofibres

Charged particles interact with external el.stat. Field,

their flow can be driven by the field.

Applications: DeskJet printers, lacquering, painting,

Fuel- charger - power - cell for car engines.

-

More expensive

ii outflow of a liquid from a capillary
II. Outflow of a liquid from a capillary

Without an external field:

Influences by the external el stat. Field:

Equal flows

slide8

Rayleigh instability caused by charged jet

L

nanofibre

Length charge density