prezentace aplikace powerpoint · special collectors - pattering 1 rotating cylinder the simplest...
Post on 27-Aug-2020
4 Views
Preview:
TRANSCRIPT
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/
top related