Electrospinning –

modifications

Direct current - DC

Alignment of electrospun

nanofibers - patterning

Special collectors

Rotating roller Vibrating plate

Sharp edged rotating disc frame

Special collectors

Wire drum

Point collectorfork

Special collectors - pattering

1Rotating cylinder

The simplest set up

High rotation speed – thousands rotations per

minute

The orientation of fibers in one direction is equal

deposition rate of fibers, and the rotational speed

of the cylinder. The smaller cylinder speed =

random fiber orientation, greater speed cylinder,

the fibers can be broken.

http://www.cosmobio.co.jp/export_e/products/cell_tissue_cultur

e/products_hks_20090105.asp?entry_id=1643

Special collectors - pattering

Wire drum

2

Wire drum

The rotation speed significantly lower

approximatly 1rpm

Special collectors - pattering

Sharp rotating disk

3

http://www.mecc.co.jp/en/html/products/sd-series.html

Special collectors - pattering

High rotation speed – thousands

rotations per minute

frame

4

Special collectors - pattering

5

Special collectors - pattering

fork

PatterningPrinted circuit

Hybrid yarns

Hybrid yarns

http://www.ros.hw.ac.uk/bitstream/10399/2245/1/BazbouzMB_0509_std.pdf

Hybrid yarns by Nanospider TM

Jirsák, O., Sanetrník, F., Chaloupek, J.: Nanofiber-covered yarns, Chemical

Fibers International 2/2011

Jirsák, O., Sanetrník, F., Chaloupek, J.: Nanofiber-covered yarns, Chemical

Fibers International 2/2011

Hybrid yarns by Nanospider TM

Jirsák, O., Sanetrník, F., Chaloupek, J.: Nanofiber-covered yarns, Chemical

Fibers International 2/2011

Hybrid yarns by Nanospider TM

Manufacture of thread

through electrospinning

Spinning from the liquid surface

Manufacture of thread

through electrospinningSpinning from the liquid surface

Manufacture of thread through

electrospinning

Two opposite jets

Manufacture of thread through

electrospinning

twisting

Manufacture of thread through

electrospinning

Twisting

průtah

zákrut

Manufacture of thread through

electrospinning

Schematic illustration of the setup for electro-spun fibers having core/sheath structure. (a) The spinneret was manufactured from two coaxial capillaries, through

which healing agent (core) and polymer solution(sheath) were simultaneously ejected to form a continuous coaxial jet. Two different SEM images of healing

agent encapsulated fibrous structures; (b) beads on string and (c) smooth tube, respectively. Inset figure of Fig. (b) and (c) is schematic of corresponding

core/sheath structures, respectively. http://braungroup.beckman.illinois.edu/JeongHoPark.html

Production of bicomponent

fibers – core-sheath by

electrospinning

Alternativa – výroba dutých vláken

Production of bicomponent

fibers – core-sheath by

electrospinning

http://www.hillsinc.net/images/meltblownfig1.jpg

http://www.mecc.co.jp/en/html/products/

spinneret/ultra_co-axial.html

Production of bicomponent

fibers – core-sheath by

electrospinning

Production of bicomponent

fibers – side-by-side by

electrospinning

The scanning electron microscopy (SEM) image of the electrospun HSPET/PTT

nanofibers shown in the graphic indicates that the as-spun fibers have curly and

helically crimped fiber morphologies. The average fiber diameter of the HSPET/PTT

nanofiber is 800 nm, and the diameter of helix is about 1–1.5 μm, simultaneously the

thread pitch of the helical structure is only about 1.5 μm that the whole fiber present a

morphology of tight spring.

Production of bicomponent

fibers – side-by-side by

electrospinning

Porous nanofibers

Nanoporous electrospun PLA nanofibers from a

dichloromethane solution.

http://what-when-how.com/nanoscience-and-nanotechnology/polymer-nanofibers-prepared-by-electrospinning-nanotechnology/