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Fiber is a rope used as a component of composite materials into
sheets to make products such as paper.
Fibe...
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Classification of fibers
1. Natural fibers. :
2. Manufactured fibers. :
 Natural fibers are taken from ani...
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Nanofibers are defined as fibers with diameters less than 100
nanometers. or smaller.
(1 nm = 10-9
m)
Gener...
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Electrospinning process
A- polymer solution in syringe
B- metal needle
C- high voltage
D- Nanofibers
E- Nan...
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Electrospinning process
A polymer solution is injected at a constant feed rate though a nozzle or needle
wh...
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Effect of process parameters on fiber diameter
FiberDia.
Collector Distance in cm.
12 20 27
FiberDia.
Flow ...
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Polymers used for Electrospinning
 Polyglycolic acid (PGA)
 Polylactic acid (PLA)
 PGA - PLA
 Polydioxa...
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Tested Polymers
Test Polymer Solvent
Voltage
[kV]
Electrospinning
I
PEO
poly(ethylene
oxide)
40% water 60%
...
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Year Author Achievements
1914 Zeleny The first one observed spinning behavior of conducting polymer
soluti...
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Comparisons
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Comparison between human hair and Nanofibers
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Comparison of red blood cell with Nanofibers
First Nanofibers produced in the Material Science Lab,
IMSP, UPLB
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IMPS - Institute of Mathematical Science...
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Uses of Nanofibers
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Nanofibers use in Cosmetic Application
skin cleansing Brush
skin Healing nanofibers skin Therapy with medi...
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Nanofibers use in Military Protective Cloths
Military Protective Cloths
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Nanofibers use in Life science
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Nanofibers use in Filter Media
Oil Filter Gas Filter
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Nanofibers use in Nano Sensors
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References
http://www.authorstream.com/
http://en.wikipedia.org
www.slideshare.net
www.powershow.com
https...
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Electrospinning process Video
Electrospinning
Technique
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Nano fibers neeraj rotela
of 23

Nano fibers neeraj rotela

Nano Fibers
Published on: Mar 3, 2016
Published in: Engineering      
Source: www.slideshare.net


Transcripts - Nano fibers neeraj rotela

  • 1. SHELLY DALAL 2 Fiber is a rope used as a component of composite materials into sheets to make products such as paper. Fiber Fibers are classified into two categories 1.Natural Fibers 2.Manufactured Fibers.
  • 2. SHELLY DALAL 3 Classification of fibers 1. Natural fibers. : 2. Manufactured fibers. :  Natural fibers are taken from animal, vegetable, or mineral sources.  Manufactured fibers are chemically produced. Like Nanofibers are produced by an electrospinning process. It is manufactured fiber.
  • 3. SHELLY DALAL 4 Nanofibers are defined as fibers with diameters less than 100 nanometers. or smaller. (1 nm = 10-9 m) Generally Nanofibers are produced by an electrospinning process Nanofibers
  • 4. SHELLY DALAL 5 Electrospinning process A- polymer solution in syringe B- metal needle C- high voltage D- Nanofibers E- Nanofibers collection on Rotating collector
  • 5. SHELLY DALAL 6 Electrospinning process A polymer solution is injected at a constant feed rate though a nozzle or needle which is charged to a high voltage (10kv to 30kv). The applied voltage is sufficiently high, the surface of the fluid elongates and a Taylor cone is established. On increasing the applied voltage further, a charged liquid jet is ejected from the Taylor cone and attracted to the earthed collector, which is positioned at a fixed distance from the needle. During this process the solvent evaporates from the polymer solution, leaving dry polymer fibers on the collector.
  • 6. SHELLY DALAL 7 Effect of process parameters on fiber diameter FiberDia. Collector Distance in cm. 12 20 27 FiberDia. Flow Rate in gm/Hour 3 5 7 1. Nanofiber properties depend on distance between needle and collector. 2. At present the production rate of this process is measured in grams per hour.
  • 7. SHELLY DALAL 8 Polymers used for Electrospinning  Polyglycolic acid (PGA)  Polylactic acid (PLA)  PGA - PLA  Polydioxanone (PDO)  Polycaprolactone (PCL)  PGA - PDO  PLA – PCL  PDO - PCL  Polymer solutions or melts  More than 30 polymers, including polyethylene oxide, DNA, polyaramids, and polyaniline, have been electrospun.  These fibers can be made of variety organic (nylon, polyester, acryl) or biological polymers (proteins, collagens).
  • 8. SHELLY DALAL 9 Tested Polymers Test Polymer Solvent Voltage [kV] Electrospinning I PEO poly(ethylene oxide) 40% water 60% ethanol mixture 3 – 12 good and stable process for voltage up to 10kV II DBC dibutyrylo chitin ethanol 6 – 16 fairly good III TAC cellulose triacetate methylo chloride 3 – 30 polymer too viscous 10 – 30 difficult IV PAN polyacrylonitrile dimethyl- formamide (DMF) 5 – 25 very good V Glycerol water 20 – 30 difficult, lack of solidification cause that the liquid jet is separated into small droplets (electrospray)
  • 9. SHELLY DALAL 10 Year Author Achievements 1914 Zeleny The first one observed spinning behavior of conducting polymer solution in electric filed 1934 Formahl The first patent related to the electrospinning process 1981 Larrondo and Manley Investigation of electrospinning using melted polymer 1996 Reneker and Chun The probability of electrospinning using different kind of polymer solutions was proved History of Electrospinning
  • 10. SHELLY DALAL 11 Comparisons
  • 11. SHELLY DALAL 12 Comparison between human hair and Nanofibers
  • 12. SHELLY DALAL 13 Comparison of red blood cell with Nanofibers
  • 13. First Nanofibers produced in the Material Science Lab, IMSP, UPLB SHELLY DALAL 14 IMPS - Institute of Mathematical Sciences and Physics UPLB – University of the Philippines Los Banos
  • 14. SHELLY DALAL 15 Uses of Nanofibers
  • 15. SHELLY DALAL 16 Nanofibers use in Cosmetic Application skin cleansing Brush skin Healing nanofibers skin Therapy with medicines
  • 16. SHELLY DALAL 17 Nanofibers use in Military Protective Cloths Military Protective Cloths
  • 17. SHELLY DALAL 18 Nanofibers use in Life science
  • 18. SHELLY DALAL 19 Nanofibers use in Filter Media Oil Filter Gas Filter
  • 19. SHELLY DALAL 20 Nanofibers use in Nano Sensors
  • 20. SHELLY DALAL 21 References http://www.authorstream.com/ http://en.wikipedia.org www.slideshare.net www.powershow.com https://moodle.fp.tul.cz/nano/mod/ www.fzu.cz/~nanoteam
  • 21. SHELLY DALAL 22 Electrospinning process Video Electrospinning Technique
  • 22. SHELLY DALAL 23

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