Loading...

Experimental Study of Various Parameters of Electrospinning on the Morphology of Micro and Nano Fibers

Abdollahzadeh, Iman | 2011

352 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42104 (04)
  4. University: Sharif University of Technology
  5. Department: Physics
  6. Advisor(s): Iraji zad, Azam
  7. Abstract:
  8. Electrospinning is a method for producing of micro and nanometer polymeric fibers. Nowadays, electrospun fibers have been demanded a lot because of various applications of fibers in optical industries, tissue engineering, and chemical and biological sensors. Producing of more complicated shape of fibers by using two new methods called Electrical Bending and Mechanical Buckling are interested in this field. The aim of this thesis is to prepare such fibers and study the effective parameters on the shapes of them. Fibers are collected on the aluminum and Fluorine-doped tin oxide (FTO) glass. Then they were observed by optical microscope. In the Electrical Bending method, we used PEO: PAMPS and PEO: Ag polymeric solutions in which one part of them is electrical conductor. Results obtained by varying parameters such as electrical conductivity, applied voltage, and concentration of polymeric solution have showed that in this method by increasing of the density of electrical charges, pitch of helical fibers decrease, and these changes are related to charging of polymeric jet near the surface of collector. Our results confirm that the Electrical Bending’s models are suitable to describe our data. In Mechanical Buckling method, the polymeric solution was PS in DMF. By changing the parameters, we have not observed any changes in the morphology of the heliacal fibers. So we suggest the morphology depend to other parameters
  9. Keywords:
  10. Morphology ; Electrospinning ; Electrical Bending ; Mechanical Buckling ; Helical Fibers

 Digital Object List

 Bookmark

No TOC